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Core i9-9940X - Intel
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Core i9-9940X
skylake x (front).png
General Info
DesignerIntel
ManufacturerIntel
Model Numberi9-9940X
Part NumberBX80673I99940X,
BXC80673I99940X
MarketDesktop
IntroductionOctober 8, 2018 (announced)
November, 2018 (launched)
Release Price$1,387 (tray)
ShopAmazon
General Specs
FamilyCore i9
Seriesi9-9000
LockedNo
Frequency3,300 MHz
Turbo Frequency4,400 MHz (1 core),
4,400 MHz (2 cores)
Bus typeDMI 3.0
Bus rate4 × 8 GT/s
Clock multiplier33
Microarchitecture
ISAx86-64 (x86)
MicroarchitectureSkylake (server)
PlatformBasin Falls Refresh
ChipsetLewisburg
Core NameSkylake X Refresh
Core Family6
Process14 nm
TechnologyCMOS
Word Size64 bit
Cores14
Threads28
Max Memory128 GiB
Multiprocessing
Max SMP1-Way (Uniprocessor)
Electrical
TDP165 W
Tjunction0 °C – 88 °C
Tstorage-25 °C – 125 °C
Packaging
PackageFCLGA-2066 (LGA)
Dimension52.5 mm × 45 mm
Pitch1.016 mm
Contacts2066
SocketSocket R4
Succession

Core i9-9940X is a 64-bit tetradeca-core high-performance x86 desktop microprocessor introduced by Intel in late 2018. This chip, which is based on the Skylake microarchitecture, is fabricated on Intel's 14 nm process. The i9-9940X operates at 3.3 GHz with a TDP of 165 W and a Turbo Boost frequency of up to 4.4 GHz. The processor supports up to 128 GiB of quad-channel DDR4-2666 memory.

In addition to its Turbo Boost frequency, the i9-9940X has a Turbo Max frequency of 4.5 GHz.


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

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
917,504 B
0.875 MiB
L1I$448 KiB
458,752 B
0.438 MiB
14x32 KiB8-way set associative 
L1D$448 KiB
458,752 B
0.438 MiB
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/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeDDR4-2666
Supports ECCNo
Max Mem128 GiB
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 19.89 GiB/s
Double 39.72 GiB/s
Quad 79.47 GiB/s

Expansions

[Edit/Modify Expansions Info]

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Expansion Options
PCIeRevision: 3.0
Max Lanes: 44
Configuration: x16, x8, x4


Graphics

This processor has no integrated graphics.

Features

[Edit/Modify Supported Features]

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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
TBMT 3.0Turbo Boost Max Technology 3.0
EISTEnhanced SpeedStep Technology
VT-xVT-x (Virtualization)
VT-dVT-d (I/O MMU virtualization)
TSXTransactional Synchronization Extensions
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Facts about "Core i9-9940X - Intel"
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Core i9-9940X - Intel#pcie +
base frequency3,300 MHz (3.3 GHz, 3,300,000 kHz) +
bus links4 +
bus rate8,000 MT/s (8 GT/s, 8,000,000 kT/s) +
bus typeDMI 3.0 +
chipsetLewisburg +
clock multiplier33 +
core count14 +
core family6 +
core nameSkylake X Refresh +
designerIntel +
familyCore i9 +
first announcedOctober 8, 2018 +
first launchedNovember 2018 +
full page nameintel/core i9/i9-9940x +
has advanced vector extensionstrue +
has advanced vector extensions 2true +
has advanced vector extensions 512true +
has ecc memory supportfalse +
has featureAdvanced Vector Extensions +, Advanced Vector Extensions 2 +, Advanced Encryption Standard Instruction Set Extension +, Hyper-Threading Technology +, Turbo Boost Technology 2.0 +, Turbo Boost Max Technology 3.0 +, Enhanced SpeedStep Technology +, Intel VT-x +, Intel VT-d +, Transactional Synchronization Extensions + and Advanced Vector Extensions 512 +
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 simultaneous multithreadingtrue +
has transactional synchronization extensionstrue +
has x86 advanced encryption standard instruction set extensiontrue +
instance ofmicroprocessor +
intel turbo boost max technology 3 0 frequency4,500 MHz (4.5 GHz, 4,500,000 kHz) +
isax86-64 +
isa familyx86 +
l1$ size896 KiB (917,504 B, 0.875 MiB) +
l1d$ description8-way set associative +
l1d$ size448 KiB (458,752 B, 0.438 MiB) +
l1i$ description8-way set associative +
l1i$ size448 KiB (458,752 B, 0.438 MiB) +
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) +
ldate3000 +
main imageFile:skylake x (front).png +
manufacturerIntel +
market segmentDesktop +
max cpu count1 +
max junction temperature361.15 K (88 °C, 190.4 °F, 650.07 °R) +
max memory131,072 MiB (134,217,728 KiB, 137,438,953,472 B, 128 GiB, 0.125 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 +
max storage temperature398.15 K (125 °C, 257 °F, 716.67 °R) +
microarchitectureSkylake (server) +
min junction temperature273.15 K (0 °C, 32 °F, 491.67 °R) +
min storage temperature248.15 K (-25 °C, -13 °F, 446.67 °R) +
model numberi9-9940X +
nameCore i9-9940X +
number of avx-512 execution units2 +
packageFCLGA-2066 +
part numberBX80673I99940X + and BXC80673I99940X +
platformBasin Falls Refresh +
process14 nm (0.014 μm, 1.4e-5 mm) +
release price$ 1,387.00 (€ 1,248.30, £ 1,123.47, ¥ 143,318.71) +
release price (tray)$ 1,387.00 (€ 1,248.30, £ 1,123.47, ¥ 143,318.71) +
seriesi9-9000 +
smp max ways1 +
socketSocket R4 +
supported memory typeDDR4-2666 +
tdp165 W (165,000 mW, 0.221 hp, 0.165 kW) +
technologyCMOS +
thread count28 +
turbo frequency (1 core)4,400 MHz (4.4 GHz, 4,400,000 kHz) +
turbo frequency (2 cores)4,400 MHz (4.4 GHz, 4,400,000 kHz) +
word size64 bit (8 octets, 16 nibbles) +