Intel HEDT CPU v4.2.2-X
Intel Core i9-7940X X-series Processor
patch
2
Core i9-7940X
Benchmarks
Total score 3,934 / 10,000, rank 393 of 2125.
Every score is out of 10,000, relative to the best CPUs. The total also counts the recommended price ($1,399, Wikipedia: List of Intel Core desktop processors (launch price)); see how scores work.
| Category | Score | Measured | |
|---|---|---|---|
| Single-thread | 4,351 | 2,475 points | |
| Multi-thread | 1,525 | 25,147 points | |
| 3D rendering | 1,465 | monster 120.3, junkshop 79.3, classroom 58.9 samples/min over 41 runs | |
| Gamingestimated | 5,614 |
Sources: PassMark (Intel Core i9-7940X @ 3.10GHz, 533 samples), Blender Open Data
Metadata
| Property | Value |
|---|---|
| Brand | Core |
| Intel name | Intel Core i9-7940X X-series Processor |
| Processor number | i9-7940X |
| Codename | Skylake |
| Generation | Skylake-X / Kaby Lake-X |
| Microarchitecture | Skylake-SP / Kaby Lake |
| Performance class | Core i9 |
| Segment | Desktop |
| Released | 2017-Q32017 |
| Status | Discontinued |
| Cores | 14 |
| Threads | 28 |
| Base clock | 3.10 GHz |
| Max clock | 4.30 GHz |
| Cache | 19.25 MB |
| Bus | 8 GT/s |
| TDP | 165 W |
| Max memory | 128 GB |
| Memory channels | 4 |
| PCIe revision | 3.0 |
| PCIe lanes | 44 |
| Max CPUs per system | 1 |
| Socket | FCLGA2066LGA2066 |
| Memory | DDR4-2666DDR4 |
| Recommended price | $1,399 |
| Instruction sets | |
| Features | |
| Source | Intel ARK (via cpu-spec-dataset) |
Uses (dependencies)
- lithography: Intel Lithography
v16.0.0(14 nm) - simd: Intel SIMD
v0.0.1(MMX) - simd: Intel SIMD
v1.4.1(SSE4.2) - simd: Intel SIMD
v2.2.0(AVX-512)
Used by (0)
Nothing depends on this version.
Known vulnerabilities and defects
- Meltdown (CVE-2017-5754): Rogue data cache load: user code can read kernel memory through speculative execution.
- Spectre variant 1 (bounds check bypass) (CVE-2017-5753): Mistrained conditional branches speculatively read out-of-bounds data. Mitigated in software only; every speculative out-of-order core is affected.
- Foreshadow / L1 Terminal Fault (CVE-2018-3615, CVE-2018-3620, CVE-2018-3646): Speculative reads from the L1 data cache through non-present page table entries, breaking SGX, OS and VMM isolation.
- Microarchitectural Data Sampling (ZombieLoad, RIDL, Fallout) (CVE-2018-12126, CVE-2018-12127, CVE-2018-12130, CVE-2019-11091): Data in store buffers, fill buffers and load ports leaks across privilege boundaries.
- Special Register Buffer Data Sampling (CrossTalk) (CVE-2020-0543): RDRAND/RDSEED results leak across cores through a shared staging buffer.
- Retbleed (CVE-2022-29901): Return instructions are hijacked through the branch target buffer on cores without enhanced IBRS.
- Downfall / Gather Data Sampling (CVE-2022-40982): The AVX gather instruction leaks stale data from internal vector registers.
Matched by codename; individual steppings may differ.
Changelog
Since the previous patch: Intel HEDT CPU v4.2.1-X (Core i9-7920X)
Performance
- ~Total score 3945 → 3934 (+0%)
- ~Single-thread 4406 → 4351 (-1%)
- ~Multi-thread 1421 → 1525 (+7%)
- ~3D rendering 1480 → 1465 (-1%)
- ~Gaming 5663 → 5614 (-1%)
Specifications
- ~Cores: 12 → 14
- ~Threads: 24 → 28
- ~Base clock: 2.90 GHz → 3.10 GHz
- ~Cache: 16.5 MB L3 Cache → 19.25 MB
- ~TDP: 140 W → 165 W
- ~Recommended price: $1,189 → $1,399
- −Instruction set: 64-bit
Since the previous minor (lower performance class): Intel HEDT CPU v4.1.2-X (Core i7-7820X)
Performance
- ~Total score 3733 → 3934 (+5%)
- ~Single-thread 4449 → 4351 (-2%)
- ~Multi-thread 1020 → 1525 (+50%)
- ~3D rendering 898 → 1465 (+63%)
- ~Gaming 5702 → 5614 (-2%)
Specifications
- ~Cores: 8 → 14
- ~Threads: 16 → 28
- ~Base clock: 3.60 GHz → 3.10 GHz
- ~Cache: 11 MB L3 Cache → 19.25 MB
- ~TDP: 140 W → 165 W
- ~PCIe lanes: 28 → 44
- ~Recommended price: $589 → $1,399
- −Instruction set: 64-bit
Since the previous major (previous generation): Intel HEDT CPU v3.0.2-K (Core i7-6900K)
Breaking changes
- ~Socket changed from FCLGA2011-3 to FCLGA2066
Security
- !Introduced: Special Register Buffer Data Sampling (CrossTalk)
- !Introduced: Downfall / Gather Data Sampling
Performance
- ~Total score 3359 → 3934 (+17%)
- ~Single-thread 4093 → 4351 (+6%)
- ~Multi-thread 864 → 1525 (+77%)
- ~3D rendering 811 → 1465 (+81%)
- ~Gaming 5158 → 5614 (+9%)
Components
Instruction sets
- +AVX-512
Features
- +Optane Memory support
- −EPT
Specifications
- ~Codename: Broadwell E → Skylake
- ~Microarchitecture: Broadwell → Skylake-SP / Kaby Lake
- ~Cores: 8 → 14
- ~Threads: 16 → 28
- ~Base clock: 3.20 GHz → 3.10 GHz
- ~Max clock: 3.70 GHz → 4.30 GHz
- ~Cache: 20 MB → 19.25 MB
- +Bus: 8 GT/s
- ~TDP: 140 W → 165 W
- ~PCIe lanes: 40 → 44
- ~Recommended price: $1,089 → $1,399
- −Instruction set: 64-bit
Raw source data
Show all 47 fields
| Field | Value |
|---|---|
| CpuId | 126695 |
| CpuName | Intel Core i9-7940X X-series Processor |
| AESTech | Yes |
| AVX512FusedMultiplyAddUnits | 2 |
| BornOnDate | Q3'17 |
| Bus | 8 GT/s |
| BusNumPorts | 0 |
| Cache | 19.25 MB |
| ClockSpeed | 3.10 GHz |
| ClockSpeedMax | 4.30 GHz |
| CodeNameText | Products formerly Skylake |
| CoreCount | 14 |
| ECCMemory | No |
| EM64 | Yes |
| Embedded | No |
| ESUDate | Sunday. December 31. 2023 |
| ExecuteDisable | Yes |
| HyperThreading | Yes |
| InstructionSetExtensions | Intel SSE4.1. Intel SSE4.2. Intel AVX2. Intel AVX-512 |
| ItemsIncluded | Please note: The boxed product does not include a fan or heat sink |
| MarketSegment | Desktop |
| MaxCPUs | 1 |
| MaxMem | 128 GB |
| MaxMemoryBandwidth | 85 GB/s |
| MaxTDP | 165 W |
| MemoryTypes | DDR4-2666 |
| NumMemoryChannels | 4 |
| NumPCIExpressPorts | 44 |
| OptaneMemorySupport | Yes |
| PCIExpressRevision | 3.0 |
| ProcessorNumber | i9-7940X |
| ProductBriefUrl | View now |
| ProductGroup | Intel Core X-series Processors |
| ScalableSockets | 1S Only |
| ServicingStatus | Baseline Servicing |
| SocketsSupported | FCLGA2066 |
| SpeedstepTechnology | Yes |
| StatusCodeText | Discontinued |
| TBTVersion | 2.0 |
| ThermalJunctionRateCode | 102°C |
| ThermalSolutionSpecification | PCG 2017X |
| ThreadCount | 28 |
| TurboBoostMaxTechMaxFreq | 4.40 GHz |
| TurboBoostMaxTechVersion | Yes |
| VTD | Yes |
| VTX | Yes |
| SourceUrl | https://ark.intel.com/content/www/us/en/ark/products/126695/intel-core-i97940x-xseries-processor-19-25m-cache-up-to-4-30-ghz.html |