CPUs / Compare

Intel Core Ultra 7 255HX vs Intel Core Ultra 9 285H

A

Product A: Intel

Core Ultra 7 255HX

46 of 74 known

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B

Product B: Intel

Core Ultra 9 285H

45 of 74 known

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Every value links to where we found it.

Only differences

AIntel Core Ultra 7 255HX

BIntel Core Ultra 9 285H

General

1 of 13 differ

Series

Core Ultra 200HX3Press releaseintel.com/content/www/us/en/newsroom/news/2025-ces-client-computing-news.htmlRead 14 October 2026Intel calls the family the Core Ultra 200HX series.

Core Ultra 200H3Press releaseintel.com/content/www/us/en/newsroom/news/2025-ces-client-computing-news.htmlRead 15 October 2026Intel calls the family the Intel Core Ultra 200H series.

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

AC8076806324, AC80768067E42Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/ordering.htmlRead 14 October 2026Ordering codes AC8076806324 (spec code Q5X3) and AC80768067E4 (spec code SRVFG), both Tray, stepping B0. ARK lists no boxed product and no recommended customer price.

QQ80768063BE, QQ80768063F12Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/ordering.htmlRead 15 October 2026Ordering codes QQ80768063BE (spec code Q5YP) and QQ80768063F1 (spec code SRQAL), both Tray, stepping A1, package FCBGA18X. ARK lists no boxed product.

GTIN / EAN

Not available

Not available

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

6 January 20253Press releaseintel.com/content/www/us/en/newsroom/news/2025-ces-client-computing-news.htmlRead 14 October 2026Intel newsroom release dated 6 January 2025 (CES, Las Vegas) introduces the Core Ultra 200HX and H series mobile processors. It does not name the 255HX and gives no price.

6 January 20253Press releaseintel.com/content/www/us/en/newsroom/news/2025-ces-client-computing-news.htmlRead 15 October 2026Intel newsroom release dated 6 January 2025 (CES, Las Vegas) introduces the Core Ultra 200HX and H series mobile processors. It names the Core Ultra 9 285H in a performance comparison with the 185H.

Status

Available1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Marketing Status: Launched. Launch Date: Q1'25. Vertical Segment: Mobile.

Available1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Marketing Status: Launched. Launch Date: Q1'25. Product Collection: Intel Core Ultra Processors (Series 2). Vertical Segment: Mobile.

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

Not available

Not available

SegmentiThe segment the chip maker sells it in. Intel calls laptop chips Mobile. AMD laptop chips that also list Desktops, for mini PCs, stay laptop.

Laptop1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Vertical Segment row reads Mobile.

Laptop1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Vertical Segment row reads Mobile.

Instruction setiApple and Qualcomm chips are Arm64. Intel and AMD chips are x86-64.

x86-641Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Instruction Set: 64-bit. Instruction Set Extensions lists Intel SSE4.1, SSE4.2 and AVX2, which are x86 extensions.

x86-641Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Instruction Set: 64-bit, with Intel 64 listed as Yes. Intel's 64-bit processors are x86-64.

CodenameiThe chip maker's codename. Intel: the Code Name row without "Products formerly". AMD: the Former Codename row without the socket.

Arrow Lake1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Code Name row reads Products formerly Arrow Lake.

Arrow Lake1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Code Name row reads Products formerly Arrow Lake.

CPU process (as published)iVerbatim name of the process the CPU cores are made on, e.g. TSMC N3B or Intel 18A.

TSMC N3B1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026CPU Lithography row: TSMC N3B.

TSMC N3B1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026CPU Lithography row: TSMC N3B.

CPU process nodeiThe nm class of the named CPU-core process, as on laptops and desktop PCs: TSMC N3B is 3, Intel 7 is 10, Intel 4 is 7 and Intel 18A is 1.8. The exact name is in CPU process (as published). I/O and graphics dies may use other nodes.

3nm1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026TSMC N3B is stored as 3 nm, as on the other Arrow Lake products. Intel prints no nm figure.

3nm1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026TSMC N3B is stored as 3 nm, as on the other Arrow Lake products. Intel prints no nm figure.

AVX-512iThe chip maker lists AVX-512 among the supported instruction extensions.

No1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Instruction Set Extensions lists Intel SSE4.1, SSE4.2 and AVX2 only.

No1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Instruction Set Extensions lists Intel SSE4.1, SSE4.2 and AVX2 only.

Cores and clocks

6 of 7 differ

Core configurationiOne row per core group the chip maker names. Intel names performance, efficient and low-power efficient cores. AMD names Zen 5 and Zen 5c cores. Qualcomm names prime and performance cores.

AIntel Core Ultra 7 255HX

Core type	Count	Core	Base clock (GHz)	Max clock (GHz)
Performance	8	Lion Cove	2.4	5.2
Efficiency	12	Skymont	1.8	4.5

Source1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026# of Performance-cores 8 with base 2.4 GHz and Max Turbo 5.2 GHz. # of Efficient-cores 12 with base 1.8 GHz and Max Turbo 4.5 GHz. Low-power Efficient-cores 0. Core names are not on ARK and come from the Tom's Hardware launch article.4Press articletomshardware.com/pc-components/cpus/intel-launches-arrow-lake-mobile-family-with-core-ultra-200hx-and-200h-processorsRead 14 October 2026Tom's Hardware, 6 January 2025: the 200HX chips use the Lion Cove P-core and Skymont E-core microarchitectures. Its table lists the 255HX with 20 cores (8+12), a 5.2 GHz P-core turbo, 30 MB cache and 55 W base and 160 W turbo power. The table's E-core column reads 1.85 GHz, which is ARK's graphics frequency, so it is not used for the E-cores.

BIntel Core Ultra 9 285H

Core type	Count	Core	Base clock (GHz)	Max clock (GHz)
Performance	6	Lion Cove	2.9	5.4
Efficiency	8	Skymont	2.7	4.5
Low-power efficiency	2	Not available	1	2.5

Source1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026# of Performance-cores 6 with base 2.9 GHz and Max Turbo 5.4 GHz. # of Efficient-cores 8 with base 2.7 GHz and Max Turbo 4.5 GHz. # of Low Power Efficient-cores 2 with base 1 GHz and Max Turbo 2.5 GHz. Total cores 16. Core names are not on ARK. Lion Cove and Skymont come from the Tom's Hardware launch article. Intel does not state the architecture of the low-power cores, so that row has no core_name.4Press articletomshardware.com/pc-components/cpus/intel-launches-arrow-lake-mobile-family-with-core-ultra-200hx-and-200h-processorsRead 15 October 2026Tom's Hardware, 6 January 2025: the 200H processors feature the Lion Cove P-core microarchitecture and employ Skymont for the E-cores. Its table lists the flagship 45 W model as 16 cores (6+8+2), 16 threads, 5.4 GHz P-core turbo and 24 MB cache, which matches ARK. The table labels that chip Core Ultra 9 258H, which looks like a typo for 285H.

CoresiPhysical cores, not threads.

20=CalculatedFrom Core configuration

16=CalculatedFrom Core configuration

Cores labelled performanceiCounts only cores the chip maker labels performance. Not available when the maker labels no roles, as on AMD chips. Qualcomm and Apple use other labels for their fastest cores.

8=CalculatedFrom Core configuration

6=CalculatedFrom Core configuration

Cores labelled efficiencyiCounts efficient and low-power efficient cores. Not available when the maker labels no roles.

12=CalculatedFrom Core configuration

10=CalculatedFrom Core configuration

ThreadsiHardware threads, including simultaneous multithreading where the chip has it.

201Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Total Threads 20. Intel Hyper-Threading Technology: No.

161Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Total Threads 16. Intel Hyper-Threading Technology is No.

Max boost clockiHighest clock the chip maker states for the processor, Intel Max Turbo Frequency or AMD Max. Boost Clock. Often reached on one or two cores only. It can be higher than every core group's max clock.

5.2GHz1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Max Turbo Frequency 5.2 GHz, the same as the Performance-core Max Turbo Frequency.

5.4GHz1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Max Turbo Frequency 5.4 GHz, the same as the Performance-core Max Turbo Frequency.

Unlocked for overclockingiThe core multiplier is unlocked, as on Intel K models and AMD chips listed as Unlocked for Overclocking. Memory profiles such as XMP or EXPO alone do not count.

Not available

Not available

Cache

2 of 3 differ

L2 cacheiTotal L2 cache of all cores.

36MB1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Total L2 Cache 36 MB.

Not available

L3 cacheiTotal L3 cache, including 3D V-Cache. Intel Smart Cache is L3. L2 is not added. A total cache figure from Qualcomm or Apple is not L3.

30MB1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 202630 MB Intel Smart Cache.

24MB1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 202624 MB Intel Smart Cache. The Total L2 Cache row is not on ARK.

AMD 3D V-CacheiExtra L3 cache stacked on a compute die. Yes when at least one compute die has it.

No1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026AMD technology. ARK lists only the 30 MB Smart Cache and no stacked cache.

No1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026AMD technology. ARK lists only the 24 MB Smart Cache and no stacked cache.

Power and thermals

4 of 4 differ

Base power (TDP)iIntel Processor Base Power or AMD Default TDP. A rating for cooler and board design, not measured power draw. A Default TDP printed as a range, such as 35-54 W, is not stored.

55W1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Processor Base Power 55 W.

45W1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Processor Base Power 45 W.

Max turbo poweriHighest package power limit at stock settings. Intel Maximum Turbo Power, or AMD's package power tracking (PPT) limit. The source note says which. Only a source that names this exact chip counts. A database value applied to a whole class of chips does not.

160W1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Maximum Turbo Power 160 W.

115W1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Maximum Turbo Power 115 W.

Configurable power rangeiThe sustained power range a PC or laptop maker may set. AMD cTDP. Intel Minimum and Maximum Assured Power.

Minimum45W1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Minimum Assured Power 45 W. ARK has no Maximum Assured Power value, so max_w is left out.

Minimum35W1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Minimum Assured Power 35 W. ARK has no Maximum Assured Power row, so max_w is left out.

Max operating temperatureiHighest die temperature the chip maker allows, called Tjmax or Tjunction. The chip lowers its clocks to stay below it.

105°C1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Max Operating Temperature 105 C. ARK prints no row named TJ Max for this chip.

110°C1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Max Operating Temperature 110 C.

Memory

3 of 6 differ

Memory supportiOfficial memory speeds per memory type, module type and module configuration, as the chip maker states them.

AIntel Core Ultra 7 255HX

Memory type	Module type	Max speed (MT/s)
DDR5	SO-DIMM	6,400

Source1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Memory Types: Up to DDR5 6400 MT/s. ARK names no module type, so the SODIMM form comes from Wccftech's report of Intel's briefing. ARK gives no rank or DIMM-per-channel detail, so the row has no config.6Press articlewccftech.com/intel-core-ultra-200hx-core-ultra-200h-arrow-lake-cpus-debut-high-end-gaming-premium-laptops/ampRead 14 October 2026Wccftech, 6 January 2025, from Intel's briefing: the 200HX CPUs support standard DDR5-6400 SO-DIMMs, or OEMs can use LPDDR5X or LP5/5x CAMM2. ARK lists only DDR5 for this chip, so only the DDR5 SODIMM row is stored.

BIntel Core Ultra 9 285H

Memory type	Max speed (MT/s)
LPDDR5	8,400
LPDDR5X	8,400
DDR5	6,400

Source1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Memory Types: Up to LPDDR5/X 8400 MT/s and up to DDR5 6400 MT/s. LPDDR5/X is stored as one lpddr5 row and one lpddr5x row at 8400. ARK names no module type, rank or configuration, so those keys are left out.

Max memory speed (official)iHighest official speed in the memory support table, for any module type. Four modules or plain UDIMMs can run slower. Intel quotes some chips with CUDIMM speeds only.

6,400MT/s=CalculatedFrom Memory support

8,400MT/s=CalculatedFrom Memory support

Memory channelsiCounted in 64-bit channels, as Intel and AMD count them. A DDR5 module has two 32-bit subchannels and makers count it as one channel. A maker that counts narrower channels and states their width is converted by the total bus width, so Qualcomm's 8 channels of 16 bits are 2. A total bus width alone is divided by 64, so AMD's 256-bit interface is 4. The maker's own count goes in the source note.

21Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Max # of Memory Channels 2.

21Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Max # of Memory Channels: 2.

Memory bandwidth (claimed)iPeak memory bandwidth the chip maker states. Not a measurement.

Not available

Not available

Max memoryiMost memory the chip maker says the processor supports. When the limit depends on the device, as for Apple chips, the highest limit the maker states for this chip in any device. The device goes in the source note. When Intel's documents differ, such as 192 GB in a launch brief and 256 GB on its spec page, the current spec page wins, since newer memory modules can raise the limit.

256GB1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Max Memory Size 256 GB, dependent on memory type. Tom's Hardware's launch table lists 96 GB for DDR5, and Wccftech writes up to 192 GB. ARK is used.

128GB1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Max Memory Size (dependent on memory type): 128 GB. Tom's Hardware's launch table gives lower limits per memory type for the 200H family. The maker's page wins.

ECC memory supportiThe chip maker says the processor supports ECC memory. Most need a board that supports it too. DDR5 on-die ECC does not count.

No1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026ECC Memory Supported: No.

No1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026ECC Memory Supported: No.

Platform

3 of 7 differ

Socket or packageiDesktop socket, e.g. AM5 or LGA1851. Laptop chips are soldered, so this is the package the maker names, e.g. FP8. When the maker names several packages, in the socket row or the product IDs, list them all separated by commas, such as "FP7, FP7r2".

BGA21141Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Package: FCBGA2114. Stored without the FC prefix.

BGA20491Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Sockets Supported: FCBGA2049. Stored without the FC prefix.

Compatible chipsetsiDesktop chipsets the chip maker lists, with the brand and without the word chipset, e.g. AMD X870E, AMD B850 or Intel Z890. Same form as the motherboard chipset.

Not available

Not available

CPU PCIe lanesiUsable PCIe lanes from the processor, one row per PCIe generation. Lanes that link the CPU to the chipset are not counted. If the maker gives only a total, a review that lists the split may be used, and the source note names it. When the package also holds the chipset, as on Intel Raptor Lake U and H chips, ARK's total includes the chipset lanes. Those are not counted, so the datasheet split is used. On Intel Core Ultra chips, such as Panther Lake, the platform controller or SoC tile is part of the processor, so its lanes count.

AIntel Core Ultra 7 255HX

PCIe generation	Lanes
5	20
4	4

Source1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Max # of PCI Express Lanes is 24 and PCI Express Revision is 5.0 and 4.0. Configurations: 1x16+2x4, 2x8+2x4, 1x8+4x4. ARK gives no per-generation split. See the Wccftech note for the 20 Gen 5 and 4 Gen 4 split.6Press articlewccftech.com/intel-core-ultra-200hx-core-ultra-200h-arrow-lake-cpus-debut-high-end-gaming-premium-laptops/ampRead 14 October 2026All Intel Core Ultra 200HX CPUs feature 4 PCIe Gen5 and 4 PCIe Gen4 lanes for SSDs. With ARK's 24 total lanes and the 1x16+2x4 configuration, the remaining 16 are the graphics lanes, which run at Gen 5. That gives 20 Gen 5 and 4 Gen 4 lanes.

BIntel Core Ultra 9 285H

PCIe generation	Lanes
5	8
4	20

Source1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026PCI Express Revision 5.0 and 4.0. PCI Express Configurations: 1x8 5.0 + 3x4 4.0 + 2x4 (x1,x2,x4) 4.0. Max # of PCI Express Lanes 28. The split is read from the configuration string: 8 lanes at Gen 5 and 12 plus 8 lanes at Gen 4, which gives 20 at Gen 4. ARK does not print the per-generation totals.

CPU PCIe lanes in totaliUsable lanes from the processor. Lanes to the chipset are not counted.

24=CalculatedFrom CPU PCIe lanes

28=CalculatedFrom CPU PCIe lanes

Highest PCIe generationiHighest PCIe generation of the processor's own lanes. Chipset lanes are not counted.

5=CalculatedFrom CPU PCIe lanes

5=CalculatedFrom CPU PCIe lanes

Native USB portsiUSB ports the processor itself provides, as the chip maker lists them. The board or laptop decides which ones reach a connector. Chipset ports are not counted. eUSB2 is the embedded USB 2.0 link that Qualcomm lists. It needs a repeater on the board to become a USB 2.0 port.

AIntel Core Ultra 7 255HX

Standard
Thunderbolt 4

Source1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Intel Thunderbolt 4: Yes. Intel gives no port count on ARK, so the row has no count.

BIntel Core Ultra 9 285H

Standard
Thunderbolt 4

Source1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Intel Thunderbolt 4: Yes. Intel gives no port count, so the row has no count.

Native USB4 or ThunderboltiThe processor itself provides USB4 or Thunderbolt. The board or laptop must still wire it to a port.

Yes=CalculatedFrom Native USB ports

Yes=CalculatedFrom Native USB ports

Integrated graphics

3 of 9 differ

Integrated graphicsiNo for chips that need a graphics card, such as Intel F models.

Yes1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026GPU Name: Intel Graphics, with Xe-cores listed.

Yes1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026

Integrated GPUiAs the chip maker names it.

Intel Graphics1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026GPU Name: Intel Graphics. ARK notes that Arc graphics is only on select H-series systems.

Intel Arc 140T1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026GPU Name: Intel Arc 140T GPU.

GPU coresiAs the chip maker counts them: AMD compute units, Intel Xe-cores, Apple GPU cores. Counts from different makers are not comparable. Intel execution units (EUs) are not Xe-cores and are not stored here. Apple sells some chips with two GPU core counts under one name, so it is per variant.

41Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Xe-cores: 4.

81Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Xe-cores: 8.

Max GPU clockiIntel Graphics Max Dynamic Frequency or AMD Graphics Frequency.

1,850MHz1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Graphics Max Dynamic Frequency 1.85 GHz. Graphics base frequency 300 MHz.

2,350MHz1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Graphics Max Dynamic Frequency 2.35 GHz.

Max displaysiDisplays the integrated GPU drives at the same time. The chip maker's total. Intel counts a built-in laptop panel in it. A count of external displays only, as Qualcomm gives, is left out and goes in the source note.

41Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026# of Displays Supported: 4.

41Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026# of Displays Supported: 4.

DisplayPort versioniHighest DisplayPort version the integrated GPU outputs, with the UHBR rate when stated.

2.1 UHBR201Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Graphics Output: eDP 1.4b, DP 2.1 UHBR20, HDMI 2.1 FRL.

2.1 UHBR201Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Graphics Output: eDP 1.4b, DP 2.1 UHBR20, HDMI 2.1 FRL.

HDMI versioniHighest HDMI version the integrated GPU outputs, as published.

2.1 FRL1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Graphics Output: eDP 1.4b, DP 2.1 UHBR20, HDMI 2.1 FRL.

2.1 FRL1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Graphics Output: eDP 1.4b, DP 2.1 UHBR20, HDMI 2.1 FRL.

Hardware video encodeiCodecs the chip maker states the integrated GPU encodes in hardware.

H.264, H.265 (HEVC), AV11Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026H.264, H.265 (HEVC) and AV1 encode and decode are all listed.

H.264, H.265 (HEVC), AV11Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026H.264 Hardware Encode/Decode Yes, H.265 (HEVC) Hardware Encode/Decode Yes, AV1 Encode/Decode Yes.

Hardware video decodeiCodecs the chip maker states the integrated GPU decodes in hardware.

H.264, H.265 (HEVC), AV11Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026H.264, H.265 (HEVC) and AV1 are listed. ARK has no VP9 row, so VP9 is left out.

H.264, H.265 (HEVC), AV11Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026H.264, H.265 (HEVC) and AV1 are listed as Yes. ARK has no VP9 row, so VP9 is left out.

NPU

1 of 2 differ

NPU performanceiNPU only, as the chip maker states it. CPU and GPU AI throughput are not included. Precision, usually INT8, belongs in the source note.

13TOPS1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026NPU Peak TOPS (Int8): 13.

13TOPS1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026NPU Peak TOPS (Int8): 13. NPU name Intel AI Boost.

Total AI performanceiThe chip maker's combined AI figure for CPU, GPU and NPU together, e.g. Intel Overall Peak TOPS or AMD Overall TOPS.

33TOPS1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026Overall Peak TOPS (Int8): 33. GPU Peak TOPS (Int8) is 8.

99TOPS1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026Overall Peak TOPS (Int8): 99. GPU Peak TOPS (Int8) is 77 and NPU Peak TOPS (Int8) is 13. Tom's Hardware's launch article quotes up to 99 platform TOPS and up to 11 NPU TOPS for the family. ARK's figures for this chip are stored.

Measured performance

None of 7 known

Cinebench 2024 single-coreiMeasured by a reviewer, not claimed by the maker. Compare only results from the same reviewer.

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Cinebench 2024 multi-coreiMeasured by a reviewer, not claimed by the maker. Compare only results from the same reviewer.

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Cinebench 2026 single-threadiMeasured by a reviewer, not claimed by the maker. The CPU (Single Thread) test, not the CPU (Single Core) test with the core's second thread. Compare only results from the same reviewer.

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Cinebench 2026 multi-coreiMeasured by a reviewer, not claimed by the maker. The CPU (Multiple Threads) test. Not comparable with Cinebench 2024. Compare only results from the same reviewer.

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Geekbench 6 single-coreiMeasured by a reviewer, not claimed by the maker. Geekbench 6 only. Geekbench 7 has another scale and is not stored here. Intel Binary Optimization on or off goes in the source note. Store results with it off. Compare only results from the same reviewer.

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Geekbench 6 multi-coreiMeasured by a reviewer, not claimed by the maker. Geekbench 6 only. Geekbench 7 has another scale and is not stored here. Intel Binary Optimization on or off goes in the source note. Store results with it off. Compare only results from the same reviewer.

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Game frame ratesiReviewer game results with this processor and the named graphics card, at native resolution with no upscaling and ray tracing off unless the source note says otherwise. Intel Binary Optimization or APO on or off goes in the source note. Store only results with it off. Compare only results from the same reviewer. A 99th percentile frame rate, as Tom's Hardware prints it, is stored as the 1 % low.

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Measured power and temperature

None of 5 known

CPU power in multi-thread load (measured)iMeasured by a reviewer, not claimed by the maker. CPU package power in a sustained all-core load such as Cinebench multi-core. Not wall power. Compare only results from the same reviewer.

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CPU power while gaming (measured)iMeasured by a reviewer, not claimed by the maker. Average CPU package power while gaming. Not wall power. Compare only results from the same reviewer. Intel Binary Optimization or APO on or off goes in the source note. A geomean that mixes games with it on and off is left out.

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CPU power at idle (measured)iMeasured by a reviewer, not claimed by the maker. CPU package power at the reviewer's idle state. Not wall power. Compare only results from the same reviewer.

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CPU temperature in stress testiMeasured by a reviewer, not claimed by the maker. Highest absolute CPU temperature in a sustained all-core load. A delta over room temperature is not stored. It depends on the cooler. Compare only results from the same reviewer.

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All-core clock in stress testiMeasured by a reviewer, not claimed by the maker. Sustained clock under an all-core load. On chips with several core groups, the clock of the group with the highest rated clock, such as Intel P-cores, even when another group measures higher. Compare only results from the same reviewer.

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In the box

None of 2 known

Cooler in the boxiA cooler comes in the retail box. Tray versions have none.

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Included cooler

Not available

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Links

Not compared

Product page

www.intel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.html1Maker product pageintel.com/content/www/us/en/products/sku/242292/intel-core-ultra-7-processor-255hx-30m-cache-up-to-5-20-ghz/specifications.htmlRead 14 October 2026

www.intel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.html1Maker product pageintel.com/content/www/us/en/products/sku/241747/intel-core-ultra-9-processor-285h-24m-cache-up-to-5-40-ghz/specifications.htmlRead 15 October 2026

Spec sheet

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Manual

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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.

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Warranty

None of 1 known

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.

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Both are also in the API. Back to all CPUs.