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Xeon W-2191B - Intel
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Xeon W-2191B
intel skylake w (front).png
General Info
DesignerIntel
ManufacturerIntel
Model NumberW-2191B
MarketWorkstation
IntroductionJune 5, 2017 (announced)
December 21, 2017 (launched)
ShopAmazon
General Specs
FamilyXeon W
SeriesW-2000
LockedYes
Frequency2,300 MHz
Turbo Frequency4,300 MHz (1 core)
Bus typeDMI 3.0
Bus rate4 × 8 GT/s
Clock multiplier23
Microarchitecture
ISAx86-64 (x86)
MicroarchitectureSkylake (server)
PlatformBasin Falls
Core NameSkylake W
Core Family6
Core SteppingU0
Process14 nm
TechnologyCMOS
Word Size64 bit
Cores18
Threads36
Max Memory512 GiB
Multiprocessing
Max SMP1-Way (Uniprocessor)
Packaging
PackageFCLGA-2066 (LGA)
Dimension52.5 mm × 45 mm
Pitch1.016 mm
Contacts2066
SocketSocket R4

W-2191B is a 64-bit 18-core x86 enterprise performance workstation microprocessor introduced by Intel in 2017. This processors, which is fabricated on an enhanced 14nm+ process based on the Skylake server microarchitecture, operates at 2.3 GHz with a TDP of 140 W and a turbo boost frequency of up to 4.3 GHz. This chip supports up to 512 GiB of quad-channel DDR4-2666 ECC memory.

This specific model appears to be a special model for Apple for their iMac Pros.


DIL16 Blank.svg Preliminary Data! Information presented in this article deal with a microprocessor or chip that was recently announced or leaked, thus missing information regarding its features and exact specification. Information may be incomplete and can change by final release.


Cache[edit]

Main article: Skylake § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
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$1.125 MiB
1,152 KiB
1,179,648 B
L1I$576 KiB
589,824 B
0.563 MiB
18x32 KiB8-way set associative 
L1D$576 KiB
589,824 B
0.563 MiB
18x32 KiB8-way set associativewrite-back

L2$18 MiB
18,432 KiB
18,874,368 B
0.0176 GiB
  18x1 MiB16-way set associativewrite-back

L3$24.75 MiB
25,344 KiB
25,952,256 B
0.0242 GiB
  18x1.375 MiB11-way set associativewrite-back

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCYes
Max Mem512 GiB
Controllers2
Channels4
Max Bandwidth79.47 GiB/s
81,377.28 MiB/s
85.33 GB/s
85,330.263 MB/s
0.0776 TiB/s
0.0853 TB/s
Bandwidth
Single 19.87 GiB/s
Double 39.74 GiB/s
Quad 79.47 GiB/s
Physical Address (PAE)46 bit

Expansions[edit]

[Edit/Modify Expansions Info]

ide icon.svg
Expansion Options
PCIeRevision: 3.0
Max Lanes: 48
Configuration: x16, x8, x4


Features[edit]

[Edit/Modify Supported Features]

Cog-icon-grey.svg
Supported x86 Extensions & Processor Features
MMXMMX Extension
EMMXExtended MMX Extension
SSEStreaming SIMD Extensions
SSE2Streaming SIMD Extensions 2
SSE3Streaming SIMD Extensions 3
SSSE3Supplemental SSE3
SSE4.1Streaming SIMD Extensions 4.1
SSE4.2Streaming SIMD Extensions 4.2
AVXAdvanced Vector Extensions
AVX2Advanced Vector Extensions 2
AVX-512Advanced Vector 512-bit (2 Units)
AVX512FAVX-512 Foundation
AVX512CDAVX-512 Conflict Detection
AVX512BWAVX-512 Byte and Word
AVX512DQAVX-512 Doubleword and Quadword Instructions
AVX512VLAVX-512 Vector Length
ABMAdvanced Bit Manipulation
BMI1Bit Manipulation Instruction Set 1
BMI2Bit Manipulation Instruction Set 2
FMA33-Operand Fused-Multiply-Add
AESAES Encryption Instructions
RdRandHardware RNG
ADXMulti-Precision Add-Carry
CLMULCarry-less Multiplication Extension
F16C16-bit Floating Point Conversion
x86-1616-bit x86
x86-3232-bit x86
x86-6464-bit x86
RealReal Mode
ProtectedProtected Mode
SMMSystem Management Mode
FPUIntegrated x87 FPU
NXNo-eXecute
HTHyper-Threading
TBT 2.0Turbo Boost Technology 2.0
EISTEnhanced SpeedStep Technology
SSTSpeed Shift Technology
TXTTrusted Execution Technology (SMX)
vProIntel vPro
VT-xVT-x (Virtualization)
VT-dVT-d (I/O MMU virtualization)
EPTExtended Page Tables (SLAT)
TSXTransactional Synchronization Extensions
MPXMemory Protection Extensions
Secure KeySecure Key Technology
SMEPOS Guard Technology
VMDVolume Management Device
IPTIdentity Protection Technology


Frequencies[edit]

See also: Intel's CPU Frequency Behavior

[Modify Frequency Info]

ModeBaseTurbo Frequency/Active Cores
123456789101112131415161718
Normal2,300MHz4,300MHz4,300MHz4,100MHz4,100MHz4,000MHz4,000MHz4,000MHz4,000MHz3,700MHz3,700MHz3,700MHz3,700MHz3,300MHz3,300MHz3,300MHz3,300MHz3,200MHz3,200MHz
AVX24,000MHz4,000MHz3,800MHz3,800MHz3,700MHz3,700MHz3,700MHz3,700MHz3,300MHz3,300MHz3,300MHz3,300MHz3,000MHz3,000MHz3,000MHz3,000MHz2,900MHz2,900MHz
AVX5123,800MHz3,800MHz3,600MHz3,600MHz3,200MHz3,200MHz3,200MHz3,200MHz2,800MHz2,800MHz2,800MHz2,800MHz2,500MHz2,500MHz2,500MHz2,500MHz2,400MHz2,400MHz
Facts about "Xeon W-2191B - Intel"
Has subobject
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Xeon W-2191B - Intel#pcie +
base frequency2,300 MHz (2.3 GHz, 2,300,000 kHz) +
bus links4 +
bus rate8,000 MT/s (8 GT/s, 8,000,000 kT/s) +
bus typeDMI 3.0 +
clock multiplier23 +
core count18 +
core family6 +
core nameSkylake W +
core steppingU0 +
designerIntel +
familyXeon W +
first announcedJune 5, 2017 +
first launchedDecember 21, 2017 +
full page nameintel/xeon w/w-2191b +
has advanced vector extensionstrue +
has advanced vector extensions 2true +
has advanced vector extensions 512true +
has ecc memory supporttrue +
has extended page tables supporttrue +
has featureAdvanced 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 +, Memory Protection Extensions +, Secure Key Technology +, OS Guard + and Identity Protection Technology +
has intel enhanced speedstep technologytrue +
has intel identity protection technology supporttrue +
has intel secure key technologytrue +
has intel speed shift technologytrue +
has intel supervisor mode execution protectiontrue +
has intel trusted execution technologytrue +
has intel turbo boost technology 2 0true +
has intel vpro technologytrue +
has intel vt-d technologytrue +
has intel vt-x technologytrue +
has locked clock multipliertrue +
has second level address translation supporttrue +
has simultaneous multithreadingtrue +
has transactional synchronization extensionstrue +
has x86 advanced encryption standard instruction set extensiontrue +
instance ofmicroprocessor +
isax86-64 +
isa familyx86 +
l1$ size1,152 KiB (1,179,648 B, 1.125 MiB) +
l1d$ description8-way set associative +
l1d$ size576 KiB (589,824 B, 0.563 MiB) +
l1i$ description8-way set associative +
l1i$ size576 KiB (589,824 B, 0.563 MiB) +
l2$ description16-way set associative +
l2$ size18 MiB (18,432 KiB, 18,874,368 B, 0.0176 GiB) +
l3$ description11-way set associative +
l3$ size24.75 MiB (25,344 KiB, 25,952,256 B, 0.0242 GiB) +
ldate3000 +
main imageFile:intel skylake w (front).png +
manufacturerIntel +
market segmentWorkstation +
max cpu count1 +
max memory524,288 MiB (536,870,912 KiB, 549,755,813,888 B, 512 GiB, 0.5 TiB) +
max memory bandwidth79.47 GiB/s (81,377.28 MiB/s, 85.33 GB/s, 85,330.263 MB/s, 0.0776 TiB/s, 0.0853 TB/s) +
max memory channels4 +
microarchitectureSkylake (server) +
model numberW-2191B +
nameXeon W-2191B +
number of avx-512 execution units2 +
packageFCLGA-2066 +
platformBasin Falls +
process14 nm (0.014 μm, 1.4e-5 mm) +
seriesW-2000 +
smp max ways1 +
socketSocket R4 +
supported memory typeDDR4-2666 +
technologyCMOS +
thread count36 +
turbo frequency (1 core)4,300 MHz (4.3 GHz, 4,300,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +
x86/has memory protection extensionstrue +