Xeon Platinum 8256 - Intel

	Edit Values
	Xeon Platinum 8256
	General Info
Designer	Intel
Manufacturer	Intel
Model Number	8256
Part Number	CD8069504194701,; BX806958256
S-Spec	SRF94; QRAP (QS)
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	B0, B1
Process	14 nm
Technology	CMOS
Word Size	64 bit
Cores	4
Threads	8
Max Memory	1 TiB
	Multiprocessing
Max SMP	8-Way (Multiprocessor)
Interconnect	UPI
Interconnect Links	3
Interconnect Rate	10.4 GT/s
	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
	Succession
	Xeon Platinum 8156

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

Expansions

[Edit/Modify Expansions Info]

Expansion Options

PCIe	Revision: 3.0
	Max Lanes: 48
	Configuration: 1x16, x8, x4

Features

[Edit/Modify Supported Features]

Supported x86 Extensions & Processor Features

MMX	MMX Extension
EMMX	Extended MMX Extension
SSE	Streaming SIMD Extensions
SSE2	Streaming SIMD Extensions 2
SSE3	Streaming SIMD Extensions 3
SSSE3	Supplemental SSE3
SSE4.1	Streaming SIMD Extensions 4.1
SSE4.2	Streaming SIMD Extensions 4.2
AVX	Advanced Vector Extensions
AVX2	Advanced Vector Extensions 2
AVX-512	Advanced Vector 512-bit (2 Units)
AVX512F	AVX-512 Foundation
AVX512CD	AVX-512 Conflict Detection
AVX512BW	AVX-512 Byte and Word
AVX512DQ	AVX-512 Doubleword and Quadword Instructions
AVX512VL	AVX-512 Vector Length
AVX512_VNNI	AVX-512 Vector Neural Network Instructions
ABM	Advanced Bit Manipulation
BMI1	Bit Manipulation Instruction Set 1
BMI2	Bit Manipulation Instruction Set 2
FMA3	3-Operand Fused-Multiply-Add
AES	AES Encryption Instructions
RdRand	Hardware RNG
ADX	Multi-Precision Add-Carry
CLMUL	Carry-less Multiplication Extension
F16C	16-bit Floating Point Conversion

x86-16	16-bit x86
x86-32	32-bit x86
x86-64	64-bit x86
Real	Real Mode
Protected	Protected Mode
SMM	System Management Mode
FPU	Integrated x87 FPU
NX	No-eXecute
HT	Hyper-Threading
TBT 2.0	Turbo Boost Technology 2.0
EIST	Enhanced SpeedStep Technology
SST	Speed Shift Technology
TXT	Trusted Execution Technology (SMX)
vPro	Intel vPro
VT-x	VT-x (Virtualization)
VT-d	VT-d (I/O MMU virtualization)
EPT	Extended Page Tables (SLAT)
TSX	Transactional Synchronization Extensions
VMD	Volume Management Device
NM	Node Manager
KPT	Key Protection Technology
PTT	Platform Trust Technology
Run Sure	Run Sure Technology (RAS Capability)
MBE Ctrl	Mode-Based Execute Control
Node Ctrlr	Node Controller Support
DL Boost	Deep Learning Boost

Frequencies

See also: Intel's CPU Frequency Behavior

[Modify Frequency Info]

Mode	Base	Turbo Frequency/Active Cores
Mode	Base	1	2	3	4
Normal	3,800MHz	3,900MHz	3,900MHz	3,900MHz	3,900MHz
AVX2	3,300MHz	3,700MHz	3,700MHz	3,700MHz	3,700MHz
AVX512	2,700MHz	3,700MHz	3,700MHz	3,500MHz	3,500MHz

Has subobject "Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.	Xeon Platinum 8256 - Intel#pcie +
base frequency	3,800 MHz (3.8 GHz, 3,800,000 kHz) +
chipset	Lewisburg +
clock multiplier	38 +
core count	4 +
core family	6 +
core name	Cascade Lake SP +
core stepping	B1 + and B0 +
cpuid	0x50655 +
designer	Intel +
family	Xeon Platinum +
first announced	April 2, 2019 +
first launched	April 2, 2019 +
full page name	intel/xeon platinum/8256 +
has advanced vector extensions	true +
has advanced vector extensions 2	true +
has advanced vector extensions 512	true +
has ecc memory support	true +
has extended page tables support	true +
has feature	Advanced Vector Extensions +, Advanced Vector Extensions 2 +, Advanced Vector Extensions 512 +, Advanced Encryption Standard Instruction Set Extension +, Hyper-Threading Technology +, Turbo Boost Technology 2.0 +, Enhanced SpeedStep Technology +, Speed Shift Technology +, Trusted Execution Technology +, Intel vPro Technology +, Intel VT-x +, Intel VT-d +, Extended Page Tables +, Transactional Synchronization Extensions + and Deep Learning Boost +
has intel deep learning boost	true +
has intel enhanced speedstep technology	true +
has intel speed shift technology	true +
has intel trusted execution technology	true +
has intel turbo boost technology 2 0	true +
has intel vpro technology	true +
has intel vt-d technology	true +
has intel vt-x technology	true +
has locked clock multiplier	true +
has second level address translation support	true +
has simultaneous multithreading	true +
has transactional synchronization extensions	true +
has x86 advanced encryption standard instruction set extension	true +
instance of	microprocessor +
isa	x86-64 +
isa family	x86 +
l1$ size	256 KiB (262,144 B, 0.25 MiB) +
l1d$ description	8-way set associative +
l1d$ size	128 KiB (131,072 B, 0.125 MiB) +
l1i$ description	8-way set associative +
l1i$ size	128 KiB (131,072 B, 0.125 MiB) +
l2$ description	16-way set associative +
l2$ size	4 MiB (4,096 KiB, 4,194,304 B, 0.00391 GiB) +
l3$ description	11-way set associative +
l3$ size	16.5 MiB (16,896 KiB, 17,301,504 B, 0.0161 GiB) +
ldate	April 2, 2019 +
main image	+
manufacturer	Intel +
market segment	Server +
max cpu count	8 +
max memory	1,048,576 MiB (1,073,741,824 KiB, 1,099,511,627,776 B, 1,024 GiB, 1 TiB) +
max memory 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) +
max memory channels	6 +
microarchitecture	Cascade Lake +
model number	8256 +
name	Xeon Platinum 8256 +
number of avx-512 execution units	2 +
package	FCLGA-3647 +
part number	CD8069504194701 + and BX806958256 +
platform	Purley +
process	14 nm (0.014 μm, 1.4e-5 mm) +
release price	$ 7,007.00 (€ 6,306.30, £ 5,675.67, ¥ 724,033.31) + and $ 7,014.00 (€ 6,312.60, £ 5,681.34, ¥ 724,756.62) +
release price (box)	$ 7,014.00 (€ 6,312.60, £ 5,681.34, ¥ 724,756.62) +
release price (tray)	$ 7,007.00 (€ 6,306.30, £ 5,675.67, ¥ 724,033.31) +
s-spec	SRF94 +
s-spec (qs)	QRAP +
series	8200 +
smp interconnect	UPI +
smp interconnect links	3 +
smp interconnect rate	10.4 GT/s +
smp max ways	8 +
socket	Socket P + and LGA-3647 +
supported memory type	DDR4-2933 +
tdp	105 W (105,000 mW, 0.141 hp, 0.105 kW) +
technology	CMOS +
thread count	8 +
turbo frequency (1 core)	3,900 MHz (3.9 GHz, 3,900,000 kHz) +
word size	64 bit (8 octets, 16 nibbles) +

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