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Core i9-7940X - Intel
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Core i9-7940X
skylake x (front).png
General Info
DesignerIntel
ManufacturerIntel
Model Numberi9-7940X
Part NumberCD8067303734701
S-SpecSR3RQ
MarketDesktop
IntroductionMay 30, 2017 (announced)
September 25, 2017 (launched)
Release Price$1,399
General Specs
FamilyCore i9
Seriesi9-7900
LockedNo
Frequency3,100 MHz
Turbo Frequency4,300 MHz (1 core),
4,300 MHz (2 cores)
Bus typeDMI 3.0
Bus rate4 × 8 GT/s
Microarchitecture
ISAx86-64 (x86)
MicroarchitectureSkylake (server)
PlatformSkylake
ChipsetLewisburg
Core NameSkylake X
Core Family6
Core Model85
Core SteppingM0
Process14 nm
TechnologyCMOS
Word Size64 bit
Cores14
Threads28
Max CPUs1 (Uniprocessor)
Max Memory128 GiB
Electrical
TDP165 W
Tstorage-25 °C – 125 °C
Packaging
PackageFCLGA-2066 (LGA)
Dimension52.5 mm x 45 mm
Pitch1.016 mm
Contacts2066
SocketSocket R4

Core i9-7940X is a 64-bit tetradeca-core high-performance x86 desktop microprocessor introduced by Intel in mid-2017. This chip, which is based on the Skylake microarchitecture, is fabricated on Intel's enhanced 14nm+ process. The i7-7940X operates at 3.1 GHz with a TDP of 165 W and a Turbo Boost frequency of 4.3 GHz. The processor supports up to 128 GiB of quad-channel DDR4-2666 memory.

In addition to its Turbo Boost frequency, the i9-7940X has a Turbo Max frequency of 4.4 GHz.

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$896 KiB
0.875 MiB
917,504 B
8.544922e-4 GiB
L1I$448 KiB
0.438 MiB
458,752 B
4.272461e-4 GiB
14x32 KiB8-way set associative 
L1D$448 KiB
0.438 MiB
458,752 B
4.272461e-4 GiB
14x32 KiB8-way set associativewrite-back

L2$14 MiB
14,336 KiB
14,680,064 B
0.0137 GiB
  14x1 MiB16-way set associativewrite-back

L3$19.25 MiB
19,712 KiB
20,185,088 B
0.0188 GiB
  14x1.375 MiB11-way set associativewrite-back

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCNo
Channels4
Max Bandwidth79.47 GiB/s
Bandwidth
Single 19.89 GiB/s
Double 39.72 GiB/s
Quad 79.47 GiB/s

Expansions[edit]

[Edit/Modify Expansions Info]

ide icon.svg
Expansion Options
PCIeRevision: 3.0
Max Lanes: 44
Configuration: x16, x8, x4


Graphics[edit]

This processor has no integrated graphics.

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
AVX512FAVX-512 Foundation
AVX512CDAVX-512 Conflict Detection
AVX512BWAVX-512 Byte and Word
AVX512DQAVX-512 Double and Quad
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
TBMT 3.0Turbo Boost Max Technology 3.0
EISTEnhanced SpeedStep Technology
VT-xVT-x (Virtualization)
VT-dVT-d (I/O MMU virtualization)
EPTExtended Page Tables (SLAT)
TSXTransactional Synchronization Extensions

Frequencies[edit]

See also: Intel's CPU Frequency Behavior

[Modify Frequency Info]

ModeBaseTurbo Frequency/Active Cores
1234567891011121314
Normal3,100 MHz4,300 MHz4,300 MHz4,100 MHz4,100 MHz4,000 MHz4,000 MHz4,000 MHz4,000 MHz4,000 MHz4,000 MHz4,000 MHz4,000 MHz3,800 MHz3,800 MHz
Facts about "Core i9-7940X - Intel"
Has subobject
"Has subobject" is a predefined property representing a container construct and is provided by Semantic MediaWiki.
Core i9-7940X - Intel#package + and Core i9-7940X - Intel#pcie +
base frequency3,100 MHz (3.1 GHz, 3,100,000 kHz) +
bus links4 +
bus rate8,000 MT/s (8 GT/s, 8,000,000 kT/s) +
bus typeDMI 3.0 +
chipsetLewisburg +
core count14 +
core family6 +
core model85 +
core nameSkylake X +
core steppingM0 +
designerIntel +
familyCore i9 +
first announcedMay 30, 2017 +
first launchedSeptember 25, 2017 +
full page nameintel/core i9/i9-7940x +
has advanced vector extensionstrue +
has advanced vector extensions 2true +
has ecc memory supportfalse +
has extended page tables supporttrue +
has featureAdvanced Vector Extensions +, Advanced Vector Extensions 2 +, Advanced Encryption Standard Instruction Set Extension +, Turbo Boost Technology 2.0 +, Turbo Boost Max Technology 3.0 +, Enhanced SpeedStep Technology +, Intel VT-x +, Intel VT-d +, Transactional Synchronization Extensions + and Hyper-Threading Technology +
has intel enhanced speedstep technologytrue +
has intel turbo boost max technology 3 0true +
has intel turbo boost technology 2 0true +
has intel vt-d technologytrue +
has intel vt-x technologytrue +
has locked clock multiplierfalse +
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$ size0.875 MiB (896 KiB, 917,504 B, 8.544922e-4 GiB) +
l1d$ description8-way set associative +
l1d$ size0.438 MiB (448 KiB, 458,752 B, 4.272461e-4 GiB) +
l1i$ description8-way set associative +
l1i$ size0.438 MiB (448 KiB, 458,752 B, 4.272461e-4 GiB) +
l2$ description16-way set associative +
l2$ size14 MiB (14,336 KiB, 14,680,064 B, 0.0137 GiB) +
l3$ description11-way set associative +
l3$ size19.25 MiB (19,712 KiB, 20,185,088 B, 0.0188 GiB) +
ldateSeptember 25, 2017 +
main imageFile:skylake x (front).png +
manufacturerIntel +
market segmentDesktop +
max cpu count1 +
max memory131,072 MiB (134,217,728 KiB, 137,438,953,472 B, 128 GiB, 0.125 TiB) +
max storage temperature398.15 K (125 °C, 257 °F, 716.67 °R) +
microarchitectureSkylake (server) +
min storage temperature248.15 K (-25 °C, -13 °F, 446.67 °R) +
model numberi9-7940X +
nameCore i9-7940X +
packageFCLGA-2066 +
part numberCD8067303734701 +
platformSkylake +
process14 nm (0.014 μm, 1.4e-5 mm) +
release price$ 1,399.00 (€ 1,259.10, £ 1,133.19, ¥ 144,558.67) +
s-specSR3RQ +
seriesi9-7900 +
socketSocket R4 +
supported memory typeDDR4-2666 +
tdp165 W (165,000 mW, 0.221 hp, 0.165 kW) +
technologyCMOS +
thread count28 +
turbo frequency (1 core)4,300 MHz (4.3 GHz, 4,300,000 kHz) +
turbo frequency (2 cores)4,300 MHz (4.3 GHz, 4,300,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +