Ultra 9 285K vs Xeon Platinum 8256

Primary details

Comparing Xeon Platinum 8256 and Core Ultra 9 285K processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	733	50
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.71	70.90
Market segment	Server	Desktop processor
Series	Intel Xeon Platinum	no data
Power efficiency	9.53	32.79
Architecture codename	Cascade Lake-SP (2018)	Arrow Lake-S (2024−2025)
Release date	11 December 2018 (5 years ago)	24 October 2024 (less than a year ago)
Launch price (MSRP)	$7,007	$589

Cost-effectiveness evaluation

Performance per price, higher is better.

Ultra 9 285K has 4046% better value for money than Xeon Platinum 8256.

Detailed specifications

Xeon Platinum 8256 and Core Ultra 9 285K basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	24 (Tetracosa-Core)
Threads	8	24
Base clock speed	3.8 GHz	3.7 GHz
Boost clock speed	3.9 GHz	5.7 GHz
Bus rate	no data	250 MHz
Multiplier	38	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	1 MB (per core)	3 MB (per core)
L3 cache	16.5 MB (shared)	36 MB (shared)
Chip lithography	14 nm	3 nm
Die size	no data	243 mm2
Maximum core temperature	72 °C	no data
Number of transistors	8,000 million	17,800 million
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	-	+

Compatibility

Information on Xeon Platinum 8256 and Core Ultra 9 285K compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	8 (Multiprocessor)	1
Socket	FCLGA3647	1851
Power consumption (TDP)	105 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Platinum 8256 and Core Ultra 9 285K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	+
Turbo Boost Max 3.0	-	no data
Deep Learning Boost	+	-

Security technologies

Xeon Platinum 8256 and Core Ultra 9 285K technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Platinum 8256 and Core Ultra 9 285K are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Platinum 8256 and Core Ultra 9 285K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2933	DDR5 Depends on motherboard
Maximum memory size	1 TB	no data
Max memory channels	6	no data
Maximum memory bandwidth	140.8 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

Arc Xe-LPG Graphics 64EU

Peripherals

Specifications and connection of peripherals supported by Xeon Platinum 8256 and Core Ultra 9 285K.

PCIe version	3.0	5.0
PCI Express lanes	48	20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	10.57	43.31
Recency	11 December 2018	24 October 2024
Physical cores	4	24
Threads	8	24
Chip lithography	14 nm	3 nm
Power consumption (TDP)	105 Watt	125 Watt

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Should you still have questions on choice between Xeon Platinum 8256 and Core Ultra 9 285K, ask them in Comments section, and we shall answer.

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