Intel® Core™ i9-7940X X-series

The Intel Core i9-7940X X-series is a desktop processor with 14 cores and 28 threads, built on the Skylake architecture. It launched in Jul 2017. Clocks run from 3.1 GHz base to 4.3 GHz boost. A 19.25-MB L3 cache backs the cores (2.4 MB per core). It addresses DDR4 memory up to 128 GB across 4 channels. The chip drops into the FCLGA2066 socket and exposes PCIe 3.0 (44 lanes). Rated TDP is 165 W. Notable platform capabilities: AVX-512, Extended Page Tables (EPT).

The Intel Core i9-7940X X-series scores 2,477 in single-core performance and 25,173 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 7,896 for overall performance, 19,830 for productivity performance, 18,304 for creator performance, 28,162 for engineering performance and 13,724 for gaming performance. Its multi-core throughput works out to 1,798 per core, 899 per thread and 153 per watt. Its computed efficiency index is 615. Its performance index is 98, so its overall performance is 2% below the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the Intel Core i9-7940X X-series scores 95,846 in integer math, 59,574 in floating-point math, 420,931 in compression, 9,016 in cryptography, 1,274 in physics simulation, 33,759 in vector SIMD, 87 in the prime sieve and 52,318 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 63% above in integer math, 30% above in floating-point math, 85% above in compression, 22% below in cryptography, 17% above in physics simulation, 118% above in vector SIMD, 30% above in the prime sieve and 131% above in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The Intel Core i9-7940X X-series has 14 physical cores and runs 28 logical threads. It runs 2 threads per core. It runs at a base clock of 3.10 GHz and boosts up to 4.30 GHz.

The Intel Core i9-7940X X-series is a desktop processor, belongs to the Intel Core i9 family, uses the Skylake architecture and carries the codename Skylake. It launched in Jul 2017.

The Intel Core i9-7940X X-series has 896 KB of L1 cache, 14 MB of L2 cache and 19.3 MB of L3 cache. That adds up to about 34.1 MB of cache, or 2.44 MB per core. Each core has 1 MB of private L2 cache.

The Intel Core i9-7940X X-series has a 3-level cache hierarchy: L1 at 896 KB, L2 at 14 MB and L3 at 19.3 MB. L3 is the largest level and makes up about 56% of the cache listed here.

The Intel Core i9-7940X X-series supports DDR4 memory, addresses up to 128 GB of memory and uses 4 memory channels. It does not support DDR5 and LPDDR memory.

The Intel Core i9-7940X X-series does not include integrated graphics, so a discrete graphics card is required for display output.

The Intel Core i9-7940X X-series uses the FCLGA2066 socket, supports PCI Express 3.0 and provides up to 44 PCIe lanes.

The Intel Core i9-7940X X-series has a rated TDP of 165 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

The Intel Core i9-7940X X-series is also identified by the model number i9-7940X.

After an audit, 1 value was corrected on the Intel Core i9-7940X X-series record. Each change is listed with its old value, new value, rule and sources.

• Integrated graphics: Yes → No. Rule: Cleanup hedt no igpu. LGA2011/LGA2011-3/LGA2066 Core desktop part: Intel ARK lists no Processor Graphics; value came from architecture inference.

The audit log is public: all changes for this CPU, the corrections overview and the method.

Feex has recorded 54% of the specifications it tracks for the Intel Core i9-7940X X-series. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Performance Cores, Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: Memory Bandwidth, ECC Memory and Max Memory Speed. Platform & Compatibility: Package and Package Size. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: Normalized Name, SKU, Processor Number and Part Number.

Processors that use the same FCLGA2066 socket as the Intel Core i9-7940X X-series and have the closest multi-core scores in the Feex database include Intel Core i9-9920X X-series, Intel Xeon W-2265, Intel Core i9-10920X X-series, Intel Xeon W-2170B and Intel Core i9-7920X X-series.