Power supplies / Compare

Seasonic CORE GX-650 (2024) vs Seasonic CORE GX-850 (2024)

A

Product A: Seasonic

CORE GX-650 (2024)

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B

Product B: Seasonic

CORE GX-850 (2024)

56 of 66 known

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Only differences

ASeasonic CORE GX-650 (2024)

BSeasonic CORE GX-850 (2024)

General

3 of 12 differ

Series

CORE GX2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026The release calls the family the CORE GX ATX 3 series, in four outputs from 1000 W to 650 W.

CORE GX2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026The release calls the family the CORE GX ATX 3 series, in four outputs from 1000 W to 650 W.

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

SRP-CGX651-A5A32SF, SRP-CGX651-A5A32SF-W4Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026Part number SRP-CGX651-A5A32SF, listed as CORE GX-650 V2, black.5Retailer pageldlc.com/en/product/PB00677582.htmlRead 14 October 2026Model SRP-CGX651-A5A32SF-W for the white CORE GX ATX 3 (2024) 650 W.

SRP-CGX851-A5A32SF, SRP-CGX851-A5A32SF-W3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Article number SRP-CGX851-A5A32SF, the black unit.8Retailer pageldlc.com/en/product/PB00657446.htmlRead 15 October 2026Model SRP-CGX851-A5A32SF for the black Seasonic CORE GX ATX 3 (2024) 850 W. The page says the product was referenced on December 5, 2024.10Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-white-850-w/21750146/productRead 15 October 2026Product number manufacturer SRP-CGX851-A5A32SF-W for the white unit.

GTIN / EAN

47111738784524Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026EAN-13 4711173878452 for the black SRP-CGX651-A5A32SF, listed by an EU retailer. The check digit is valid.

4711173878476, 47111738787283Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026EAN 4711173878476 for SRP-CGX851-A5A32SF (black). The check digit is valid.9Retailer pagemultitronic.fi/en/products/4589683/seasonic-core-gx-850w--virtalahde--80-plus-goldRead 15 October 2026EAN 4711173878728, product colour white. The check digit is valid.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

6 December 20242Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026Press release dated December 6, 2024.

6 December 20242Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026Press release dated December 6, 2024.

Status

Available4Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026Listing shows the black unit available in October 2026.

Available3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026The page lists the black unit in stock with 2 pieces.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

From $89.992Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 20264Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 20265Retailer pageldlc.com/en/product/PB00677582.htmlRead 14 October 2026

From $129.992Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 20269Retailer pagemultitronic.fi/en/products/4589683/seasonic-core-gx-850w--virtalahde--80-plus-goldRead 15 October 202610Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-white-850-w/21750146/productRead 15 October 2026

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

From €105.92Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 20264Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 20265Retailer pageldlc.com/en/product/PB00677582.htmlRead 14 October 2026

From €129.92Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 20269Retailer pagemultitronic.fi/en/products/4589683/seasonic-core-gx-850w--virtalahde--80-plus-goldRead 15 October 202610Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-white-850-w/21750146/productRead 15 October 2026

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

US, EU2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026The release lists a USA price and an EU price for the black CORE ATX 3 GX-650, and a rest of the world price that names no country. Only US and EU are stored.

US, EU2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026The release lists a USA price and an EU price for the black unit and a rest of the world price that names no country. Only US and EU are stored.

ColoursiThe maker's own colour names

Black, White2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026Available in black and white. The white version is built to order in the USA and ships in late February 2025 in Europe.

Black, White2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026Available in black and white.

Form factoriThe physical size standard that decides what fits in the case. An ATX unit is 150 × 86 mm at the back. An SFX unit is 125 × 63.5 mm.

ATX3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page, copied from Seasonic's table: form factor ATX/EPS, 140 x 150 x 86 mm, an ATX body.

ATX3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026The page copies Seasonic's spec table. Form Factor ATX/EPS, 140 x 150 x 86 mm, which is the ATX back face of 150 x 86 mm.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Type ATX12V.

ATX versioniThe ATX12V design guide revision the maker claims compliance with. A 16-pin GPU cable alone does not establish ATX 3.x. A Cybenetics report that withholds its ATX badge does not change the maker's claim. It goes in the source note.

ATX 3.12Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026The units comply with the latest ATX 3.1 and PCIe Gen 5.1 standards.7Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/SEA%20SONIC%20ELECTRONICS%20CO.%20LTD._SRP-CGX651-A5A32SF_650W_SOCE%207566_Report_0.pdfRead 14 October 2026The certificate lists the type as ATX 3.1.

ATX 3.12Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026The units comply with the latest ATX 3.1 and PCIe Gen 5.1 standards.7Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/SEA%20SONIC%20ELECTRONICS%20CO.%20LTD._SRP-CGX851-A5A32SF_850W_SOCE%207565_Report_0.pdfRead 15 October 2026The list names the form factor ATX 3.1.

PCIe CEM versioniThe PCI Express card power revision the maker claims, as printed next to the ATX version. It sets the GPU power connector rules. It is not a slot speed. A reviewer's statement is not enough.

PCIe 5.12Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026The units comply with PCIe Gen 5.1.

PCIe 5.12Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026The units comply with PCIe Gen 5.1.

Modular cablesiFull means every cable detaches. Semi means some cables are fixed, usually the 24-pin and CPU cables.

Fully modular2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 202680 Plus Gold certified units with a fully modular design and color-matching cables with a braided pattern.

Fully modular2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 202680 Plus Gold certified units with a fully modular design and color-matching cables with a braided pattern.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Cable Design Fully Modular.

Built by (OEM)iThe company that designed and built the unit for the brand, such as CWT or FSP. As named by the maker, a teardown review or a Cybenetics report.

Not available

Seasonic6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026DUT Information: OEM/ODM Seasonic. Parts Description: Manufacturer (OEM) Seasonic.

Power

4 of 9 differ

Rated continuous poweriThe continuous DC output the maker rates the unit for, such as 850. Peak or power excursion figures are not stored here.

650W3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: total continuous power 650 W.

850W3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Total continuous power 850 W.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Manufacturer-provided information: Rated Power 850 W.

Full power rated up toiThe ambient temperature up to which the maker rates full continuous power, such as 50 °C. A review table that prints 0-50 °C with no maker source is not enough. An operating temperature range that does not say full power is not enough. A maker table with load steps gives the full-load row, such as 40 °C at full load next to 50 °C at 80 percent load. A temperature that a Cybenetics report marks as manufacturer-provided counts as a maker statement.

40°C3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page, operating temperature: 0-50 C, with derating from 100% to 80% linearly from 40 C to 50 C. Full power is therefore rated up to 40 C.

40°C3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Operating Temperature 0 - 50 C, with derating from 100 % to 80 % linearly from 40 C to 50 C. Full power is therefore rated up to 40 C.4Retailer pageinside-tech.co.uk/power-supplies-2/seasonic-core-gx-v4-850w-80-plus-gold-atx-3-1-modular-psu-with-120mm-fdb-fan-braided-cables-7-year-warranty-blackRead 15 October 2026Operating Temperature 0 - 50 C (derating from 100 % to 80 % from 40 C to 50 C linearly).

12V rail designiHow the maker splits +12V over-current protection. Switchable means the user picks single or multi rail with a switch or in software.

Single rail3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Page 1 says the label shows a single rail (monorail) design. A retail listing also says single +12V rail.

Single rail6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Power Specifications: one +12V column with 70 A and 840 W, and one 12V OCP result.

+12V max currentiHighest combined current on +12V from the maker's power table. For a multi-rail unit this is the combined total, not one rail.

54A3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page, DC output: +3.3V 20A, +5V 20A, +12V 54A, -12V 0.3A, +5VSB 3A.

70A3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026DC output: +3.3 V 20 A, +5 V 20 A, +12 V 70 A, -12 V 0.3 A, +5 VSB 3 A.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 3: the +12V rail can deliver 70 A and the +3.3V and +5V 20 A, for a total of 850 W.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Power Specifications table: +12V 70 A.

+12V max poweriHighest combined power on +12V from the maker's power table.

648W3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: +12V 648 W.6Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-650-w/21660874/productRead 14 October 2026Combined power +12V 648 W, max output current +12V 54 A.

840W4Retailer pageinside-tech.co.uk/power-supplies-2/seasonic-core-gx-v4-850w-80-plus-gold-atx-3-1-modular-psu-with-120mm-fdb-fan-braided-cables-7-year-warranty-blackRead 15 October 2026The page copies Seasonic's spec table. DC output maximum power: +12 V 840 W, with 100 W, 3.6 W and 15 W for the other rows. The listing text names the white version.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Power Specifications table: +12V 840 W.

+3.3V and +5V combined poweriThe combined limit for the +3.3V and +5V rails from the maker's power table. A table that prints the same figure under both rails, as be quiet! does, shows one shared limit, so the figure is stored once and not added.

100W3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: 100 W shared by the +3.3V and +5V rails.

100W4Retailer pageinside-tech.co.uk/power-supplies-2/seasonic-core-gx-v4-850w-80-plus-gold-atx-3-1-modular-psu-with-120mm-fdb-fan-braided-cables-7-year-warranty-blackRead 15 October 2026Power output row prints 100 W once for the +3.3 V and +5 V rails, so it is one shared limit.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Power Specifications table: one merged 100 W cell for 3.3V and 5V, 20 A each.

+5V standby currentiHighest current on the +5VSB standby rail. It powers USB charging and wake functions while the PC is off.

3A3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: +5VSB 3A, 15 W.

3A3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026DC output: +5 VSB 3 A.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Power Specifications table: 5VSB 3 A, 15 W.

AC input voltageiThe rated AC input range, such as 100 to 240 V.

Lowest100Highest240V3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: AC input 100 V - 240 V, 50-60 Hz, full range.

Lowest100Highest240V3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026AC input 100 V - 240 V, 11 - 5.5 A, 50 Hz - 60 Hz.4Retailer pageinside-tech.co.uk/power-supplies-2/seasonic-core-gx-v4-850w-80-plus-gold-atx-3-1-modular-psu-with-120mm-fdb-fan-braided-cables-7-year-warranty-blackRead 15 October 2026AC input 100 V - 240 V, 11 - 5.5 A, 50 Hz - 60 Hz.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Manufacturer-provided information: 100-240 Vrms, 5.5-11 A, 50-60 Hz.

Alternative low power mode (ALPM)iThe maker or a Cybenetics report states support for the ATX alternative low power mode used by Modern Standby.

Not available

Yes6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Temperature and Compliance Info: ALPM compatible, checked.

Certifications

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80 PLUS ratingiThe 80 PLUS level. When the 80 PLUS listing or certificate and the maker claim differ, store the listing level and put the claim and test voltage in the source note. When a model has several 80 PLUS entries, such as a newer test at a higher level, use the newest entry that matches the current maker documents.

80 PLUS Gold2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 202680 Plus Gold certified, as printed in the release. The 80 PLUS list agrees.7Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/SEA%20SONIC%20ELECTRONICS%20CO.%20LTD._SRP-CGX651-A5A32SF_650W_SOCE%207566_Report_0.pdfRead 14 October 202680 PLUS list entry ID 7566, model SRP-CGX651-A5A32SF, 650W, 80 PLUS Gold, tested 9/24/24 at 115V nominal and 60 Hz (typical efficiency at 50% load 91.33%).

80 PLUS Gold7Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/SEA%20SONIC%20ELECTRONICS%20CO.%20LTD._SRP-CGX851-A5A32SF_850W_SOCE%207565_Report_0.pdfRead 15 October 202680 PLUS ID 7565, model SRP-CGX851-A5A32SF, 850 W, Gold at 115V, certified 09/24/2024, 91.43 percent at 50 percent load. The list has no sample serial, so the match is by model code and wattage.

Cybenetics efficiency at 115ViThe Cybenetics ETA level from the 115V test. The Cybenetics report wins over the maker's claim.

Not available

Cybenetics Platinum6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Report issued Mar 6, 2025, lab ID SS85002750. The database name is Core GX-850 ATX3 and the report has no sample serial. The database lists ETA Platinum at 115V. The sample has the fan, capacitors and cable set of the CORE GX-850 that KitGuru reviewed.

Cybenetics efficiency at 230ViThe Cybenetics ETA level from the 230V test. The 230V thresholds are higher, so the level can differ from the 115V level. The Cybenetics report wins over the maker's claim.

Not available

Cybenetics Platinum6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026The database lists ETA Platinum at 230V.

Cybenetics noise at 115ViThe Cybenetics LAMBDA level from the 115V test. A++ is the quietest. The Cybenetics report wins over the maker's claim.

Not available

A-6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026The database lists LAMBDA A- at 115V. Seasonic's spec table said TBA at launch.

Cybenetics noise at 230ViThe Cybenetics LAMBDA level from the 230V test. The Cybenetics report wins over the maker's claim.

Not available

A-6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026The database lists LAMBDA A- at 230V.

Measured

10 of 10 differ

Average efficiency at 115V (measured)iAverage efficiency over the whole load range at 115V input, from more than 1450 load combinations in the Cybenetics method. It is not the peak efficiency or the efficiency at 50% load.

Not available

89.073%6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Average over more than 1450 load combinations at 115V. Sample received Feb 11, 2025, tested Feb 20, 2025, ambient 28-32 C.

Average efficiency at 230V (measured)iThe same average efficiency at 230V input.

Not available

91.095%6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Average over more than 1450 load combinations at 230V.

Light-load efficiency at 115V (measured)iEfficiency at a 10 W load for units up to 500 W, or at a 2% load for larger units, at 115V input. This is the ATX light-load test.

Not available

71.934%6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Efficiency at 2% load (more than 500 W unit) at 115V.

Average power factor at 115V (measured)iAverage power factor over the whole load range at 115V input. 1 is the best possible value.

Not available

0.9776Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Average over more than 1450 load combinations at 115V. At 230V it is 0.943.

Average noise at 115V (measured)iAverage noise over the whole load range at 115V input in the Cybenetics method, at about 30 °C ambient. It is not the noise at full load.

Not available

28.17dB(A)6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Average over more than 1450 load combinations at 115V, ambient 28-32 C, Bruel and Kjaer 2270 G4 sound analyzer. The 230V average is 28.19 dBA.

Noise at full load at 115V (measured)iNoise at 100% load at 115V input in the Cybenetics typical load tests. That row often runs at about 45 °C intake. The intake temperature and the fan speed go in the source note. Lower is better.

Not available

43.7dB(A)6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Typical load tests at 115V, 100% load row: 43.7 dB(A) at 1729 rpm fan speed, 45.73 C intake temperature.

Standby power with no load at 115V (measured)iPower the unit draws from the wall with the PC off and nothing drawn from +5VSB, at 115V input.

Not available

0.0665W6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Standby power consumption at 115V with no load on +5VSB: 0.0665 W. At 230V it is 0.1740 W.

Hold-up time (measured)iHow long the outputs stay in regulation after AC power is lost, at maximum continuous load, as printed in the Cybenetics report. The report names no input voltage. The AC loss to PWR_OK time goes in the source note. Higher is better.

Not available

18ms6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 18.0 ms, AC loss to PWR_OK 14.7 ms.

12V ripple at full load (measured)iPeak-to-peak ripple on the +12V rail at full load and 115V input. Lower is better.

Not available

28.89mV6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 29.48 mV.

12V load regulation (measured)iHow far the +12V voltage moves between light and full load at 115V input. Lower is better.

Not available

1.14%6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 1.13%.

Cables and connectors

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CablesiOne row per kind of cable that runs from the PSU to a device. Connector is the plug at the device end. Count is the number of those plugs over all cables in the row. Length runs from the PSU end to the first plug. Adapters that plug into other cables are left out. Use 16-pin PCIe when the maker names a 16-pin GPU cable without saying 12V-2x6 or 12VHPWR. A cable from a 12V-2x6 socket on the PSU to 8-pin plugs is a cable, not an adapter, and counts as PCIe 8-pin. When the maker's documents name one GPU cable both 12VHPWR and 12V-2x6, use 16-pin PCIe and name both in the source note. Cables of one connector kind with different lengths or wire gauges get one row each.

ASeasonic CORE GX-650 (2024)

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge
ATX 24-pin (20+4)	1	1	610	Not available
CPU 8-pin (EPS, 4+4)	2	2	750	16AWG
PCIe 8-pin (6+2)	2	1	700	16AWG
12V-2x6	1	1	700	16AWG
SATA power	6	2	Not available	Not available
4-pin Molex	3	1	Not available	Not available

Source3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Page 1 cable list with counts and lengths: ATX 24-pin 1 x 610 mm, ATX12V/EPS 4+4-pin 2 x 750 mm, 12V-2x6 1 x 700 mm, 12V-2x6 to 2 PCIe 1 x 700 mm, Molex x3 1 cable 690 mm, SATA with 3 connectors 2 cables 750 mm. The review says there are no native PCIe 6+2 cables and that the two traditional PCIe cables come from the 12V-2x6 socket of the PSU, so the dual 8-pin cable shares that socket with the native 12V-2x6 cable. The review gives 16 AWG for the CPU and PCIe cables. Lengths come from this single review, since Seasonic's own cable table was not readable. The SATA 750 mm and Molex 690 mm figures match Seasonic's cable table for the CORE GX family, which gives the length to the last plug, so they are not stored.4Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026Connector counts: 12VHPWR 1, PCI-Express 6+2 pin 2, Molex 3, SATA 6, 4+4 pin ATX/EPS 2, 20+4 pin ATX 1. LDLC lists the same counts for the white unit.5Retailer pageldlc.com/en/product/PB00677582.htmlRead 14 October 2026Power connectors: 2 x +12V (P8, 2 x P4), 6 x Serial ATA, 1 x ATX 20+4 pin, 3 x Molex (4 pin), 2 x PCI Express 6+2 pin, 1 x PCI Express 16 pin (12V-2x6).6Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-650-w/21660874/productRead 14 October 2026One Molex connector and two PATA connectors, 3 four-pin plugs in all, matching the Noticias3D cable list.

BSeasonic CORE GX-850 (2024)

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	610	16-18AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	750	16AWG	Not available
PCIe 8-pin (6+2)	1	1	750	16-18AWG	Not available
PCIe 8-pin (6+2)	2	1	700	16-18AWG	Not available
12V-2x6	1	1	700	16AWG	600
SATA power	6	2	455	18AWG	Not available
4-pin Molex	3	1	455	18AWG	Not available

Source5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 2 shows Seasonic's Cable Summary slide for the CORE GX ATX 3, 850 W column: MB 610 mm 1 cable with 20+4 pins, CPU 750 mm 2 cables with 4+4 pins, 12V-2x6 700 mm 1 cable, PCIe 750 mm 1 cable with 6+2 pins, PCIe 700 mm 1 cable with 16 pins to 2 x 6+2 pins, SATA 750 mm 2 cables with 3 connectors, Molex 690 mm 1 cable with 3 connectors. The review says both connector types support up to 600 W. The SATA and Molex lengths run to the last plug, so the first-plug lengths come from the Cybenetics report (455 mm for both). The page 3 photo of the modular panel shows one 12-pin PCIe socket, so the 16-pin to dual 8-pin cable shares that socket with the native 12V-2x6 cable. Wire gauges come from Cybenetics.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Cables and Connectors table: ATX 20+4 pin 620 mm 16-18AWG, 2 x 4+4 pin EPS12V 750 mm 16AWG, one cable with 2 x 6+2 pin PCIe plugs 710 mm 16-18AWG, one 6+2 pin PCIe 750 mm 16-18AWG, 12+4 pin PCIe 700 mm (600W) 16-28AWG, 2 SATA cables of 455+155+155 mm with 6 plugs, one 4-pin Molex cable of 455+125+125 mm with 3 plugs, 18AWG, no in-cable capacitors. The 16-28AWG range of the 12V-2x6 cable includes the thin sideband wires, so the stored gauge is the 16AWG power wire. Seasonic's slide lengths are stored where they are first-plug lengths. Cybenetics measured 620 mm for the 24-pin cable and 710 mm for the dual 8-pin cable.8Retailer pageldlc.com/en/product/PB00657446.htmlRead 15 October 2026Power connectors: 2 x +12V (P8, 2 x P4), 6 x Serial ATA, 1 x ATX 20+4 pin, 3 x Molex (4 pin), 3 x PCI Express 6+2 pin, 1 x PCI Express 16 pin (12V-2x6).

CPU (EPS) connectorsi8-pin or 4+4-pin CPU power plugs.

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PCIe 8-pin connectorsi8-pin or 6+2-pin GPU power plugs. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

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16-pin GPU connectorsiNative 16-pin GPU power plugs: 12V-2x6, 12VHPWR and 16-pin cables of unstated revision. Adapters are not counted. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

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SATA power connectors

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4-pin Molex connectors

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Cable styleiHow the modular cables are made. Mixed means some cables are sleeved and others flat, such as a sleeved 24-pin cable with flat other cables. From the maker page or a review photo page.

Sleeved3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page, cable type: individual black cables with a braided pattern. Page 1: one sleeve per wire.

Sleeved3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Cable type: Individual Black Cables with Braided Pattern.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026The cables are individually braided.

Fan

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Fan sizeiFrame size of the cooling fan, such as 120, 135 or 140.

120mm2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026A 120 mm hydro dynamic bearing fan with Seasonic's Smart and Silent Fan Control.3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: fan size 120 mm. The review's sample had an Ong Hua 120 mm fan.

120mm2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026A 120 mm hydro dynamic bearing fan with Seasonic's Smart and Silent Fan Control.3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Fan Size 120 mm, Fan Control Smart and Silent Fan Control, life expectancy 25,000 hours at 40 C.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 4: Hong Hua 120 mm Hydro (Fluid) Dynamic Bearing fan, 12 V, 0.58 A, up to 2,200 rpm, model HA1225H12F-Z.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Fan Hong Hua HA1225H12F-Z, 120 mm.

Fan bearingiUse the maker's bearing name. FDB and S-FDB are fluid dynamic. HDB is hydrodynamic. Noctua SSO and SSO2 are SSO. Corsair Magnetic Dome is magnetic dome. A brand bearing name that fits no option is Other.

Hydrodynamic (HDB)2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026Hydro dynamic bearing fan, 120 mm.3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: hydro dynamic bearing (Rodamiento hidrodinamico), life 25,000 hours at 40 C, 15-65% RH.

Hydrodynamic (HDB)2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026Hydro dynamic bearing fan, 120 mm.3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Fan Bearing: Hydro Dynamic Bearing.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 4: Hong Hua 120mm Hydro (Fluid) Dynamic Bearing (HDB).6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Fan Hong Hua HA1225H12F-Z, 120 mm, 12 V, 0.58 A, listed as a Fluid Dynamic Bearing fan. Seasonic names it a Hydro Dynamic Bearing.

Fan modeiSemi-passive means the fan stops at low load, often sold as zero RPM, hybrid or 0 dB mode. Fanless means the unit has no fan.

Not available

Always on5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 3: no Hybrid fan control is offered with this unit. The fan spins very slowly at low power and the unit is not audible below about 650 W. Some retailers print a semi-fanless row. Quiet PC copies the same row for the 650, 750 and 850 W columns, even printing 850 W power output in the 650 W column, so it is not used.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Semi-Passive Operation is not ticked. The typical load tests show 836 rpm at 10 percent load and 833 rpm at 20 percent, so the fan always spins.

Fan mode switchiA button, switch or software setting lets the user turn the semi-passive mode off so the fan always spins. A unit without a semi-passive mode, whose fan the maker says always spins, has no switch, so it is false.

Not available

No5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 3: no Hybrid fan control is offered. The unit has no fan mode switch.

Protection and parts

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ProtectionsiProtections the maker lists, or a retailer spec table copies from the maker, plus protections the Cybenetics protection tests show working (UVP, NLO, SIP). The Cybenetics manufacturer list has no OVP or UVP row, so do not build the list from it alone. A protection that is not listed may still exist. No-load covers no-load operation and no-load protection. Fan failure is a maker's fan failure protection or fan safeguard, also when the Cybenetics manufacturer block lists it.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP)3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: OCP, OPP, OTP, OVP, SCP, UVP.4Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026OPP, OCP, OTP, OVP, SCP, UVP.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP), No-load (NLO), Surge and inrush (SIP)3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Protection: OPP, OCP, OTP, OVP, SCP, UVP.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 4: OPP, OVP, UVP, OCP, OTP and SCP.6Measurementcybenetics.com/evaluations/psus/2750Read 15 October 2026Protection Features (Manufacturer): OPP, +12V OCP, OTP, SCP, surge and inrush protection. The protection tests tick NLO and SIP (surge MOV, inrush NTC and bypass relay). Fan failure protection is not present. The report has no UVP row, so OVP and UVP come from the maker.

All-Japanese capacitorsiThe maker states that every electrolytic capacitor is from a Japanese maker. A Japanese bulk capacitor alone is not enough. A spec row such as "Japanese capacitors" that names no exception counts.

Not available

Not available

MTBF (claimed)iThe maker's mean time between failures, such as 100000. An MTTF figure for the whole unit counts too. An MTTF for the fan alone does not. The test temperature goes in the source note.

100,000h3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: MTBF 100,000 hours at 25 C, without the fan.6Retailer pageparadigit.ie/seasonic-core-gx-atx3-1-650-w/21660874/productRead 14 October 2026Mean time between failures 100000 h.

100,000h3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026MTBF at 25 C, excluding the fan: 100,000 hours.4Retailer pageinside-tech.co.uk/power-supplies-2/seasonic-core-gx-v4-850w-80-plus-gold-atx-3-1-modular-psu-with-120mm-fdb-fan-braided-cables-7-year-warranty-blackRead 15 October 2026MTBF at 25 C, excl. fan 100,000 hours.

Monitoring and lighting

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Software monitoringiThe unit reports power, temperature or fan data to PC software over a USB or internal connection.

Not available

Not available

SoftwareiThe maker's software for monitoring or control.

Not available

Not available

Built-in power displayiA screen on the unit that shows live power draw or other readings.

Not available

Not available

RGB lighting

No5Retailer pageldlc.com/en/product/PB00677582.htmlRead 14 October 2026LED RGB: No. The listing is for the white unit.

No8Retailer pageldlc.com/en/product/PB00657446.htmlRead 15 October 2026LED RGB: No.

Dimensions and weight

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DimensionsiBody without cables. Width and height are the back face with the AC inlet. Depth is the length into the case, which decides case fit.

Width150Height86Depth140mm(5.9 × 3.4 × 5.5 in)3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: 140 x 150 x 86 mm. A retailer writes it as 140 mm (L) x 150 mm (W) x 86 mm (H). Depth 140, width 150, height 86.

Width150Height86Depth140mm(5.9 × 3.4 × 5.5 in)3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026140 mm (L) x 150 mm (W) x 86 mm (H). Depth 140, width 150, height 86. The page lists the Cybenetics levels as TBA, so those fields come from the Cybenetics report.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 3: 140 mm x 150 mm x 86 mm.8Retailer pageldlc.com/en/product/PB00657446.htmlRead 15 October 2026Height 86 mm.

WeightiWeight of the unit alone. Use the Hardware Busters figure on hwbusters.com when the maker states none, not a copy on another site. Maker weights that include cables or the box, such as Corsair's, and retailer packed weights are not stored. A net weight counts unless the maker says it includes the cables.

Not available

Not available

In the box

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In the boxiItems supplied with this exact model, verbatim. The AC power cord differs per region.

Not available

Cable ties, Screws for mounting, Regional specific power cable, Literature5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Page 2: the box contains some cable ties, screws for mounting, a regional specific power cable and some literature, with the cables set to one side. Review dated December 31, 2024.

Links

Not compared

Product page

seasonic.com/core-gx-atx-3-20241Maker product pageseasonic.com/core-gx-atx-3-2024Read 14 October 2026Seasonic's site is blocked for agents, so the page text was not read. The link is the CORE GX ATX 3.1 family page that search results name for this unit. The specs come from Seasonic's launch release, the 80 PLUS list, a review that copies Seasonic's spec table and EU retailer listings.

seasonic.com/core-gx-atx-3-20241Maker product pageseasonic.com/core-gx-atx-3-2024Read 15 October 2026Seasonic's site is blocked for agents, so the page text was not read. The link is the CORE GX ATX 3.1 family page that search results name for this unit. The specs come from Seasonic's launch release, retailer copies of Seasonic's spec table, a cable slide printed in a review, the 80 PLUS list and the Cybenetics report.

Spec sheet

Not available

Not available

Manual

Not available

Not available

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

7years2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 14 October 2026Sea Sonic's 7-year worldwide manufacturer's warranty.3Reviewnoticias3d.com/articulo/3844/seasonic-core-gx-atx-3-2024-650w-review-apuesta-economica-ultimos-estandares.htmlRead 14 October 2026Specifications page: 7 years.4Retailer pagedekada.com/en/seasonic-psu-atx-31-650w-gold-full-modular-pcie-51-core-gx650-v2-srpcgx651a5a32sf-p-6265.htmlRead 14 October 2026Warranty 84 months.

7years2Press releasefunkykit.com/news/seasonic-launches-updated-core-atx-3-psu-series-with-atx-3-1-and-pcie-gen-5-1Read 15 October 2026Sea Sonic's 7-year worldwide manufacturer's warranty.3Retailer pageeshop.enzure.se/seasonic-850w-seasonic-core-srp-cgx851-a5a32sf/cat-p/c/p1005186250Read 15 October 2026Warranty 7 Years.5Reviewkitguru.net/components/power-supplies/zardon/seasonic-core-gx-850-atx-3-reviewRead 15 October 2026Closing page: the Core GX range comes with a 7 year warranty.

Both are also in the API. Back to all power supplies.