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Xeon Platinum 8256
General Info
Designer	Intel
Manufacturer	Intel
Model Number	8256
Part Number	CD8069504194701
S-Spec	SRF94
Market	Server
Introduction	April 2, 2019 (announced) April 2, 2019 (launched)
Release Price	$7007.00 (tray) $7014.00 (box)
Shop	Amazon
General Specs
Family	Xeon Platinum
Series	8200
Locked	Yes
Frequency	3,800 MHz
Turbo Frequency	3,900 MHz (1 core)
Clock multiplier	38
CPUID	0x50655
Microarchitecture
ISA	x86-64 (x86)
Microarchitecture	Cascade Lake
Platform	Purley
Chipset	Lewisburg
Core Name	Cascade Lake SP
Core Family	6
Core Stepping	B1
Process	14 nm
Technology	CMOS
Word Size	64 bit
Cores	4
Threads	8
Max Memory	1 TiB
Multiprocessing
Max SMP	8-Way (Multiprocessor)
Electrical
TDP	105 W
Packaging
Package	FCLGA-3647 (FCLGA)
Dimension	76.16 mm × 56.6 mm
Pitch	0.8585 mm × 0.9906 mm
Contacts	3647
Socket	Socket P, LGA-3647

Xeon Platinum 8256 is a 64-bit quad-core x86 high-performance server microprocessor introduced by Intel in early 2019. The Platinum 8256 is based on the Cascade Lake microarchitecture and is manufactured on a 14 nm process. This chip supports 8-way multiprocessing, sports 2 AVX-512 FMA units as well as three Ultra Path Interconnect links. This microprocessor supports up 1 TiB of hexa-channel DDR4-2933 memory, operates at 3.8 GHz with a TDP of 105 W and features a turbo boost frequency of up to 3.9 GHz.

Cache

Main article: Cascade Lake § Cache

The Xeon Platinum 8256 features a considerably larger non-default 16.5 MiB of L3, a size that would normally be found on a 12-core part.

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 256 KiB 262,144 B 0.25 MiB L1I$ 128 KiB 131,072 B 0.125 MiB 4x32 KiB 8-way set associative   L1D$ 128 KiB 131,072 B 0.125 MiB 4x32 KiB 8-way set associative write-back L2$ 4 MiB 4,096 KiB 4,194,304 B 0.00391 GiB     4x1 MiB 16-way set associative write-back L3$ 16.5 MiB 16,896 KiB 17,301,504 B 0.0161 GiB     12x1.375 MiB 11-way set associative write-back

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR4-2933 Supports ECC Yes Max Mem 1 TiB Controllers 2 Channels 6 Max Bandwidth 131.13 GiB/s 134,277.12 MiB/s 140.8 GB/s 140,799.765 MB/s 0.128 TiB/s 0.141 TB/s Bandwidth Single 21.86 GiB/s Double 43.71 GiB/s Quad 87.42 GiB/s Hexa 131.13 GiB/s