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CORSAIR Vengeance RGB DDR5 CUDIMM vs Patriot Viper Xtreme 5 CKD DDR5

A

Product A: CORSAIR

Vengeance RGB DDR5 CUDIMM

32 of 40 known

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B

Product B: Patriot

Viper Xtreme 5 CKD DDR5

28 of 40 known

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Every value links to where we found it.

Only differences

ACORSAIR Vengeance RGB DDR5 CUDIMM

BPatriot Viper Xtreme 5 CKD DDR5

General

2 of 9 differ

Series

VENGEANCE1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

Viper Xtreme 51Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

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

CMHC48GX5M2X7000C36, CMHC48GX5M2X8000C38, CMHC48GX5M2X8200C40, CMHC48GX5M2X8400C40, CMHC48GX5M2X8800C42, CMHC48GX5M2X9200C44, CMHC96GX5M4X7000C361Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026The page lists five 48GB (2x24GB) kits at 7000 CL36, 8000 CL38, 8400 CL40, 8800 CL42 and 9200 CL44 as options of one product. Two more kits, 8200 CL40 and the 96GB (4x24GB) 7000 CL36, have their own pages and appear as options there. The 96GB kit is marked Pre-EOL in the page data. The non-RGB VENGEANCE DDR5 CUDIMM kits (SKU CMKC) are a separate line and are not stored. Corsair states no 2x48GB CUDIMM kit on its site now, although the launch coverage named 96GB kits.

VX548G8640CK, VX548G9244CK, VX548G9646CK1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026The SKU Sheets tab groups 3 Non-RGB Kits (VX548G9646CK, VX548G9244CK, VX548G8640CK) and 2 RGB Kits (VX5R48G8640CK, VXR548G9244CK). The sheets and the QVL name the lines Viper Xtreme 5 CKD DDR5 and Viper Xtreme 5 RGB CKD DDR5. This product is the Non-RGB line. The RGB kits are not stored. All kits are 48GB (2x24GB).

GTIN / EAN

0840440495710, 084044049485010Retailer pagescan.co.uk/products/48gb-2x24gb-corsair-ddr5-cudimm-vengeance-rgb-pc5-67200-8400-non-ecc-unbuffered-cas-40-rgb-led-xmp-3Read 15 October 2026GTIN 840440494850 for CMHC48GX5M2X8400C40, printed as a 12 digit UPC. Stored as a 13 digit GTIN with a leading zero.11Retailer pagegeeknetic.es/comparador-precios/memoria-ddr5-corsair-vengeance-rgb-48gb-2x24gb-8200mhz-cl40-xmp-cudimm/comprarRead 15 October 2026EAN 0840440495710 for CMHC48GX5M2X8200C40.

4711378430738, 4711378430745, 47113784307522Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G8640_CK_sku_sheet_83d1f3d9d0.pdfRead 15 October 202613-digit barcode printed on the sheet of VX548G8640CK: 4711378430738.3Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9244_CK_sku_sheet_750f6e30b9.pdfRead 15 October 202613-digit barcode printed on the sheet of VX548G9244CK: 4711378430745.4Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9646_CK_sku_sheet_43a0ad294a.pdfRead 15 October 202613-digit barcode printed on the sheet of VX548G9646CK: 4711378430752.

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

3 December 20246Press releasecorsair-newsroom.prgloo.com/news/corsair-vengeance-rgb-ddr5-cudimms-deliver-cutting-edge-performance-with-a-bold-modern-aestheticRead 15 October 2026Corsair release dated 2024-12-03 (Milpitas).

January 20258Press articlekitguru.net/components/memory/matthew-wilson/ces-2025-patriot-unleashes-ultra-fast-9600mt-s-memory-and-previews-lpcamm2Read 15 October 2026KitGuru CES 2025 report of 10 January 2025: Patriot showed Viper Xtreme 5 CKD memory at speeds up to 9600MT/s and capacities up to 48GB with a silver heatshield. No timings, price or availability were stated.

Status

Available1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

Available1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

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.

Not available

Not available

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.

Not available

Not available

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

Not available

Not available

ColoursiThe maker's own colour names

Silver1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Memory Color SILVER on every variant. Corsair's press release calls the RGB finish mirrored silver.

Silver1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Specs tab: Color Silver. Sheets: Silver with Black Viper logo / Silver light bar.

Memory typeiMemory generation. A kit line sold in two generations is two products.

DDR51Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

DDR51Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Module typeiUDIMM is the standard desktop module and SO-DIMM the laptop module. CUDIMM and CSODIMM add a clock driver on the module. RDIMM is a registered server or workstation module. The clock driver decides. A kit with a clock driver on the module is CUDIMM even when the maker's spec table or sheet title says UDIMM.

CUDIMM1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

CUDIMM1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026The QVL tab and the SKU sheet text say CUDIMM with an onboard clock driver. The Specs tab and the sheet title write UDIMM for the form factor. CUDIMM is stored because the module carries a clock driver.

Kit

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Kit capacityiTotal of all modules in one kit, e.g. 32 for 2 x 16 GB.

48, 96GB1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

48GB1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Modules per kit

2, 41Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

21Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Capacity per module

24GB1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

24GB1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Speed and timings

6 of 8 differ

Rated speediData rate of the kit's fastest XMP or EXPO profile, the speed on the label. A kit without a profile shows its JEDEC speed. A speed the maker writes in MHz, such as 6000MHz, is the data rate, so it is 6000 MT/s.

7,000, 8,000, 8,200, 8,400, 8,800, 9,200MT/s1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Tested Speed on each variant. Stored as the data rate in MT/s. Corsair notes tested speeds can need overclocking or BIOS changes and depend on the motherboard and CPU.

8,600, 9,200, 9,600MT/s1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

CAS latency (CL)iCAS latency at the rated speed, in clock cycles. Lower is quicker at the same speed.

36, 38, 40, 42, 441Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Tested Latency on each variant, a single CL number such as 40. Corsair lists only CL for these kits now.

40, 44, 461Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

TimingsiPrimary timings at the rated speed in the order tCL-tRCD-tRP-tRAS, as the maker writes them. Timings of the profile on the label, which is profile 1 when the maker numbers them. Other profiles at the same speed go in the source note.

38-50-50-128, 40-52-52-1357Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026Default DDR5-5600 48-48-48-90. XMP profile DDR5-8400 40-52-52-135 at 1.4 V.8Reviewaphnetworks.com/reviews/corsair-vengeance-rgb-ddr5-8400-2x24gbRead 15 October 2026Page 1 copies Corsair's spec list: SPD 5600 MT/s 48-48-48-90 at 1.1 V and tested 40-52-52-135 at 1.40V.9Reviewkitguru.net/components/memory/leo-waldock/corsair-vengeance-rgb-ddr5-8400-cudimm-reviewRead 15 October 2026Spec table of the reviewed kit: PC5-65600 (DDR5-8200), tested latency 40-52-52-135, tested voltage 1.40V, SPD latency 48-48-48-90. This is the 8200 CL40 kit. The review title says 8400 but tests at 8200. No AIDA64 figures are printed in text, only charts, so no measured values are stored from it.12Retailer pagearvutitark.ee/en/pc-components/memory-ram/ram-corsair-d5-8000-48gb-c38-vengeance-rgb-cu-k2-1420323Read 15 October 2026Retailer listing of CMHC48GX5M2X8000C38 states timings 38-50-50-128. Corsair now lists only CL38. The listing calls the form factor UDIMM, which is a retailer label.

40-52-52-138, 44-56-56-147, 46-58-58-1262Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G8640_CK_sku_sheet_83d1f3d9d0.pdfRead 15 October 2026Profile 1 of the sheet is the speed and CL on the label: 40-52-52-138.3Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9244_CK_sku_sheet_750f6e30b9.pdfRead 15 October 2026Profile 1 of the sheet is the speed and CL on the label: 44-56-56-147.4Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9646_CK_sku_sheet_43a0ad294a.pdfRead 15 October 2026Profile 1 of the sheet is the speed and CL on the label: 46-58-58-126.

VoltageiDRAM voltage at the rated speed.

1.4, 1.45V1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Tested Voltage: 1.40V on the 7000, 8000, 8200 and 8400 kits and on the 96GB kit. 1.45V on the 8800 and 9200 kits.

1.45V1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Overclocking profilesiProfiles stored on the modules. EXPO ULL is AMD's EXPO Ultra Low Latency profile. None means the kit has no XMP or EXPO profile and runs from its default SPD settings. This includes a faster default speed with no profile, such as Kingston Plug N Play. Every DDR5 kit listed as Intel XMP is XMP 3.0. Every DDR4 kit listed as Intel XMP is XMP 2.0. The order follows the maker's list, profile 1 first.

Intel XMP 3.01Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Performance Profile: Intel XMP on every kit. Page text: custom Intel XMP 3.0 profiles. Tom's Hardware states each kit has one XMP 3.0 profile and no backup profile.7Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026

Intel XMP 3.01Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Page: Support for Intel XMP 3.0. Sheets: XMP 3.0 overclocking supported.

Default speed (JEDEC)iSpeed the kit runs at without a profile. Makers call it SPD speed or default speed. The data rate in MT/s. A maker's SPD speed written in MHz, such as 5600MHz, is 5600 MT/s. A tool such as CPU-Z shows half the data rate, so DDR5-2400 in CPU-Z is 4800 MT/s.

4,800, 5,600MT/s1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026SPD Speed 5600MHz on the 48GB kits, written as MHz by Corsair and meaning a 5600 MT/s data rate (Tom's Hardware: DDR5-5600). SPD Speed 4800MHz on the 96GB kit page.

6,400MT/s1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Specs tab: Base Speeds 6400, Base Timings 52, Base Voltage 1.1V. Each sheet repeats Base Frequency PC5-51200 (6400MT/s), Base Timings 52-52-52-103 and Base Voltage 1.1V.

Default CAS latency (JEDEC)iCAS latency at the default speed. The kit's own default timings from its datasheet count, even when they differ from the JEDEC standard bin, as on Kingston Plug N Play kits.

40, 481Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026SPD Latency 48 on the 48GB kits. SPD Latency 40 on the 96GB kit. Reviews of the 8400 kit write the SPD set as 48-48-48-90.

521Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026The sheet base timings 52-52-52-103 are stored. The CPU-Z SPD screenshot in the FunkyKit review shows CL 56 for JEDEC profile 14 (3200 MHz). The maker sheet wins.

Default voltage (JEDEC)iDRAM voltage at the default speed.

1.1V1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

1.1V1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Modules

2 of 5 differ

RankiRanks on one module, from the maker's datasheet or a review. Single-sided or double-sided does not give the rank on DDR5, so it is not used to set it.

Single rank7Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026Review of CMHC48GX5M2X8400C40 (published 12 May 2025): two 24GB modules with a single-rank design.

Not available

DRAM chipsiChip maker and die as named by the maker or found in a review. The same part number can ship with other chips over time. Only when a photo or teardown shows the chips or the maker states them. The row names the tested part number.

SK hynix M-die (H5CGD8MGBDX021)7Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026Eight SK hynix H5CGD8MGBDX021 (M-die) ICs on one side, 3GB each. PMIC MPSB5431CS03 from Monolithic Power Systems. Clock driver DR5CKD1GC0 from Rambus.8Reviewaphnetworks.com/reviews/corsair-vengeance-rgb-ddr5-8400-2x24gbRead 15 October 2026Page 2: the ICs are marked H5CGD8MGBDX021, SK hynix M-die, eight 3GB chips on one side of each module.

Not available

ECCiModules sold as ECC, with error correction across the whole module. The on-die ECC inside every DDR5 chip does not count.

No10Retailer pagescan.co.uk/products/48gb-2x24gb-corsair-ddr5-cudimm-vengeance-rgb-pc5-67200-8400-non-ecc-unbuffered-cas-40-rgb-led-xmp-3Read 15 October 2026Product name says Non-ECC Unbuffered.

No4Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9646_CK_sku_sheet_43a0ad294a.pdfRead 15 October 2026The sheet lists On-Die ECC only in a complete specifications list. That is the ECC inside every DDR5 chip. No sheet or page names ECC across the module, so ram_ecc is false.

Heat spreaderiA heat spreader or cover is fitted on the modules.

Yes1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Heat Spreader: Aluminum.

Yes1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Sheet: aluminum heat spreader. The black anodized aluminum heatshield has a silver light bar.

Module heightiHeight of one module from the bottom edge of the contacts to the top, with the heat spreader and light bar as sold. It decides the clearance under large CPU air coolers. This is the vertical height standing in the slot, not the board thickness. Makers write L x W x H, and some call the standing height W. Use the middle number of the three. A size with only two numbers gives length and height, so the smaller is the height. The longest is the module length and the smallest the thickness.

44mm4Maker product pagecorsair.com/us/en/explorer/diy-builder/memory/ddr5-memory-module-dimensionsRead 15 October 2026Corsair's table lists VENGEANCE RGB (SKU prefix CMH) at 135 mm length, 8 mm width and 44 mm height (1.74 in). The table has no CUDIMM row. CUDIMM part numbers also start with CMH. Tom's Hardware gives the same 44 mm for the RGB CUDIMM. APH Networks wrote 47 mm from the pins to the top of the heat spreader. The 44 mm value is stored.7Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026The review gives the standard Vengeance CUDIMM at 1.38 in (35 mm) and the RGB version at 1.74 in (44 mm).

44mm1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Specs tab: Dimensions 0.6 cm (L) x 13.5 cm (W) x 4.4 cm (H). The middle number is the 44 mm standing height. The sheets give 1.73 in for the same value.

Lighting and software

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RGB lightingiLighting the user can set.

Yes1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Page text: ten individually addressable RGB LEDs per module in a light bar. Lighting: RGB.

No1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026The SKU Sheets tab groups these kits as Non-RGB Kits. The page text about RGB lighting covers the RGB line on the same page. The FunkyKit review sample has no RGB illumination.

Lighting synciMotherboard and app lighting ecosystems the maker lists, as a short name without a version: ASUS Aura Sync, MSI Mystic Light, Gigabyte RGB Fusion, ASRock Polychrome Sync, CORSAIR iCUE. When the maker names only motherboard brands for lighting control, each brand is written as its system, such as ASUS Aura Sync for ASUS.

CORSAIR iCUE1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026The page marks the product iCUE enabled. It names no motherboard lighting system.

Not available

SoftwareiMaker's app for lighting or settings.

CORSAIR iCUE1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026iCUE controls lighting, XMP profiles and voltage regulation per the page text.

Not available

Measured

2 of 2 differ

AIDA64 memory test (measured)iAIDA64 Cache and Memory Benchmark results from a reviewer, one row per tested kit and setting. Read, write and copy are in MB/s as AIDA64 prints them, where 1 MB is 1,048,576 bytes. Results depend on the CPU and board, so compare rows from the same CPU only. AIDA64 switches a result of 100 GB/s or more to GB/s, where 1 GB is 1024 MB, so 113.64 GB/s is stored as 116367 MB/s, rounded to a whole MB/s. The printed figure goes in the source note.

ACORSAIR Vengeance RGB DDR5 CUDIMM

Part number	CPU	Speed (MT/s)	Timings	Read (MB/s)	Write (MB/s)	Copy (MB/s)	Latency (ns)
CMHC48GX5M2X8400C40	Intel Core Ultra 7 265K	8,400	40-52-52-135	117,379	94,170	102,964	84.8

Source8Reviewaphnetworks.com/reviews/corsair-vengeance-rgb-ddr5-8400-2x24gbRead 15 October 2026Page 5 charts. Intel Core Ultra 7 265K, ASUS ProArt Z890-Creator WiFi, integrated graphics, Windows 11 Pro, AIDA64 Engineer memory tests, kit at its XMP profile DDR5-8400 40-52-52-135. Read 117379, Write 94170, Copy 102964 MB/s, latency 84.8 ns. The review does not print the part number. The review names the kit Vengeance RGB DDR5-8400 2x24GB, and CMHC48GX5M2X8400C40 is the only 8400 kit Corsair lists.

BPatriot Viper Xtreme 5 CKD DDR5

Part number	CPU	Speed (MT/s)	Timings	Read (MB/s)	Write (MB/s)	Copy (MB/s)	Latency (ns)
VX548G9646CK	Intel Core Ultra 7 265K	9,600	46-58-58-126	115,426	94,128	103,428	95.2
VX548G9646CK	Intel Core Ultra 7 265K	9,000	42-58-58-141	111,528	89,478	99,848	96.5
VX548G9646CK	Intel Core Ultra 7 265K	9,000	Not available	128,020	100,710	110,740	75.4

Source6Reviewfunkykit.com/reviews/memory/patriot-viper-xtreme-5-ckd-48gb-ddr5-9600-memory-kit-reviewRead 15 October 2026AIDA64 Cache and Memory Benchmark v7.70 on an Intel Core Ultra 7 265K with an MSI MEG Z890 Unify-X, BIOS 1.A60 (from the AIDA64 screenshot), Colorful RTX 4080, dual channel. Values are printed on the review charts. Row 1 is XMP profile 1 at 9600 MT/s and row 2 is XMP profile 2 at 9000 MT/s, both on automatic settings in Gear 4. Row 3 is the reviewer's 9000 MT/s manual overclock in Gear 2 with tighter timings that the review does not state. A single AIDA64 screenshot of the 9600 XMP run in the review reads 115.71 GB/s read, 92847 MB/s write, 103.08 GB/s copy and 93.1 ns, so runs vary. The review lists XMP 2 as CL42-58-58 and the maker sheet as 42-56-56-144. The stored 42-58-58-141 is what the module SPD and the reviewer's timing screenshot show.

Overclock reached (measured)iHighest stable setting a reviewer reached with their sample. Other samples can reach less.

ACORSAIR Vengeance RGB DDR5 CUDIMM

Part number	CPU	Speed (MT/s)	Timings	Voltage (V)
CMHC48GX5M2X8400C40	Intel Core Ultra 9 285K	8,800	40-52-52-135	1.45
CMHC48GX5M2X8400C40	Intel Core Ultra 7 265K	8,600	44-56-56-142	1.4

Source7Reviewtomshardware.com/pc-components/ram/corsair-vengeance-rgb-cudimm-ddr5-8400-c40-2x24gb-reviewRead 15 October 2026Intel Core Ultra 9 285K on an MSI MEG Z890 Unify-X (firmware 7E20v1A41), Corsair iCUE Link Titan 360 RX LCD, open bench. Raising DRAM voltage from 1.40 V to 1.45 V gave DDR5-8800 at the same 40-52-52-135 timings. The reviewer stopped there. The same 1.45 V also ran DDR5-8400 at 38-50-50-128, called borderline stable. On the AMD test system (Ryzen 9 9700X, MSI MPG X870E Carbon WiFi) the kit ran in bypass mode and the system was unstable, so no results exist there.8Reviewaphnetworks.com/reviews/corsair-vengeance-rgb-ddr5-8400-2x24gbRead 15 October 2026Page 10. Same system, kept at 1.40 V. DDR5-8800 at stock latencies booted but was not Prime95 stable. DDR5-8600 at 44-56-56-142 was Prime95 stable.

BPatriot Viper Xtreme 5 CKD DDR5

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Warranty

0 of 2 differ

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.

Not available

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Lifetime warrantyiThe maker gives a limited lifetime warranty. A fixed term shows as the warranty in years instead.

Yes1Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026Page text: limited lifetime warranty.

Yes1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026Specs tab and every sheet: Limited lifetime warranty.

Links

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Product page

www.corsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c401Maker product pagecorsair.com/us/en/p/memory/cmhc48gx5m2x8400c40/vengeance-rgb-48gb-2x24gb-ddr5-cudimm-8400mts-cl40-memory-kit-cmhc48gx5m2x8400c40Read 15 October 2026

www.patriotmemory.com/products/xtreme5-ckd-ddr5-performance-ram1Maker product pagepatriotmemory.com/products/xtreme5-ckd-ddr5-performance-ramRead 15 October 2026

Spec sheet

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patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9646_CK_sku_sheet_43a0ad294a.pdf4Maker spec sheet (PDF)patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/VX_548_G9646_CK_sku_sheet_43a0ad294a.pdfRead 15 October 2026SKU sheet of the 9600 MT/s kit VX548G9646CK, the fastest and best known SKU.

Manual

www.corsair.com/us/en/explorer/diy-builder/memory/dram5Owner's manualcorsair.com/us/en/explorer/diy-builder/memory/dramRead 15 October 2026Corsair DRAM quick start guide, linked from the product page. It is general and not Vengeance CUDIMM specific.

patriot-cms-media.sgp1.cdn.digitaloceanspaces.com/Installation_guide_memory_28b4cfe5c6.pdf5Owner's manualpatriot-cms-media.sgp1.cdn.digitaloceanspaces.com/Installation_guide_memory_28b4cfe5c6.pdfRead 15 October 2026Installation guide of Patriot memory, linked on the product page Downloads tab. It covers installation and holds no model specs.

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

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Both are also in the API. Back to all RAM kits.