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Xeon Silver 4108
General Info
Designer	Intel
Manufacturer	Intel
Model Number	4108
Part Number	BX806734108, CD8067303561500
S-Spec	SR3GJ QN0A (QS)
Market	Server
Introduction	July 11, 2017 (announced) July 11, 2017 (launched)
Release Price	$417.00
Shop	Amazon
General Specs
Family	Xeon Silver
Series	4000
Locked	Yes
Frequency	1,800 MHz
Turbo Frequency	3,000 MHz (1 core)
Clock multiplier	18
CPUID	0x50654
Microarchitecture
ISA	x86-64 (x86)
Microarchitecture	Skylake (server)
Platform	Purley
Chipset	Lewisburg
Core Name	Skylake SP
Core Family	6
Core Stepping	U0
Process	14 nm
Technology	CMOS
Word Size	64 bit
Cores	8
Threads	16
Max Memory	768 GiB
Multiprocessing
Max SMP	2-Way (Multiprocessor)
Interconnect	UPI
Interconnect Links	2
Interconnect Rate	9.6 GT/s
Electrical
TDP	85 W
Tcase	0 °C – 77 °C
TDTS	0 °C – 90 °C
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 Silver 4208

Xeon Silver 4108 is a 64-bit octa-core x86 dual-socket mid-range performance server microprocessor introduced by Intel in mid-2017. The Silver 4108, which is based on the server configuration of the Skylake microarchitecture and is manufactured on a 14 nm+ process, sports 1 AVX-512 FMA unit as well as two Ultra Path Interconnect links. This microprocessor, which operates at 1.8 GHz with a TDP of 85 W and a turbo boost frequency of up to 3 GHz, supports up 768 GiB of hexa-channel DDR4-2400 ECC memory.

Cache

Main article: Skylake § Cache

[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$ 512 KiB 524,288 B 0.5 MiB L1I$ 256 KiB 262,144 B 0.25 MiB 8x32 KiB 8-way set associative   L1D$ 256 KiB 262,144 B 0.25 MiB 8x32 KiB 8-way set associative write-back L2$ 8 MiB 8,192 KiB 8,388,608 B 0.00781 GiB     8x1 MiB 16-way set associative write-back L3$ 11 MiB 11,264 KiB 11,534,336 B 0.0107 GiB     8x1.375 MiB 11-way set associative write-back

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type DDR4-2400 Supports ECC Yes Max Mem 768 GiB Controllers 2 Channels 6 Max Bandwidth 107.3 GiB/s 109,875.2 MiB/s 115.212 GB/s 115,212.498 MB/s 0.105 TiB/s 0.115 TB/s Bandwidth Single 17.88 GiB/s Double 35.76 GiB/s Quad 71.53 GiB/s Hexa 107.3 GiB/s

Expansions

[Edit/Modify Expansions Info]

	Expansion Options
	PCIe Revision 3.0 Max Lanes 48 Configs x16, 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 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 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 MBE Ctrl Mode-Based Execute Control

Frequencies

See also: Intel's CPU Frequency Behavior

[Modify Frequency Info]

Mode	Base	Turbo Frequency/Active Cores
		1	2	3	4	5	6	7	8
Normal	1,800 MHz	3,000 MHz	3,000 MHz	2,700 MHz	2,700 MHz	2,100 MHz	2,100 MHz	2,100 MHz	2,100 MHz
AVX2	1,400 MHz	2,900 MHz	2,900 MHz	2,300 MHz	2,300 MHz	1,800 MHz	1,800 MHz	1,800 MHz	1,800 MHz
AVX512	900 MHz	1,800 MHz	1,800 MHz	1,500 MHz	1,500 MHz	1,200 MHz	1,200 MHz	1,200 MHz	1,200 MHz

Benchmarks

[Edit Benchmarks]

Test: SPEC CPU2017
Tested: 2017-10-26 18:22:55-0400
Chips: 2, Cores: 16, Copies: 32

Vendor: HPE
System: ProLiant DL380 Gen10 (1.80 GHz, Intel Xeon Silver 4108)

SPECrate2017_int_base: 65.5

Test: SPEC CPU2017
Tested: 2017-10-25 08:47:13-0400
Chips: 2, Cores: 16, Threads: 16

Vendor: HPE
System: ProLiant DL380 Gen10 (1.80 GHz, Intel Xeon Silver 4108)

SPECspeed2017_int_base: 6.85

Test: SPEC CPU2017
Tested: 2017-10-25 12:03:49-0400
Chips: 2, Cores: 16, Threads: 16

Vendor: HPE
System: ProLiant DL380 Gen10 (1.80 GHz, Intel Xeon Silver 4108)

SPECspeed2017_fp_base: 56.3

Test: SPEC CPU2017
Tested: 2017-10-26 08:39:40-0400
Chips: 2, Cores: 16, Copies: 32

Vendor: HPE
System: ProLiant DL380 Gen10 (1.80 GHz, Intel Xeon Silver 4108)

SPECrate2017_fp_base: 77.5