Intel® Core™ i7-7820X X-series

The Intel Core i7-7820X X-series is a desktop processor with 8 cores and 16 threads, built on the Skylake architecture. It launched in Apr 2017. Clocks run from 3.6 GHz base to 4.3 GHz boost. A 11-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 (28 lanes). Rated TDP is 140 W. Notable platform capabilities: AVX-512, Extended Page Tables (EPT).

The Intel Core i7-7820X X-series scores 2,522 in single-core performance and 17,147 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 6,576 for overall performance, 14,676 for productivity performance, 13,970 for creator performance, 17,576 for engineering performance and 11,853 for gaming performance. Its multi-core throughput works out to 2,143 per core, 1,072 per thread and 123 per watt. Its computed efficiency index is 556. Its performance index is 81, so its overall performance is 19% 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 i7-7820X X-series scores 57,143 in integer math, 35,405 in floating-point math, 254,273 in compression, 5,989 in cryptography, 1,036 in physics simulation, 20,905 in vector SIMD, 61 in the prime sieve and 31,866 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 3% below in integer math, 23% below in floating-point math, 11% above in compression, 48% below in cryptography, 5% below in physics simulation, 35% above in vector SIMD, 9% below in the prime sieve and 41% 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 i7-7820X X-series has 8 physical cores and runs 16 logical threads. It runs 2 threads per core. It runs at a base clock of 3.60 GHz and boosts up to 4.30 GHz.

The Intel Core i7-7820X X-series is a desktop processor, belongs to the Intel Core i7 family, uses the Skylake architecture, carries the codename Skylake and is manufactured on a 14 nm process. It launched in Apr 2017.

The Intel Core i7-7820X X-series has 512 KB of L1 cache, 8 MB of L2 cache and 11 MB of L3 cache. That adds up to about 19.5 MB of cache, or 2.44 MB per core. Each core has 1 MB of private L2 cache.

The Intel Core i7-7820X X-series has a 3-level cache hierarchy: L1 at 512 KB, L2 at 8 MB and L3 at 11 MB. L3 is the largest level and makes up about 56% of the cache listed here.

The Intel Core i7-7820X 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 i7-7820X X-series does not include integrated graphics, so a discrete graphics card is required for display output.

The Intel Core i7-7820X X-series uses the FCLGA2066 socket, supports PCI Express 3.0 and provides up to 28 PCIe lanes.

The Intel Core i7-7820X X-series has a rated TDP of 140 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 i7-7820X X-series is also identified by the model number i7-7820X.

After an audit, 1 value was corrected on the Intel Core i7-7820X 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 55% of the specifications it tracks for the Intel Core i7-7820X 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 i7-7820X X-series and have the closest multi-core scores in the Feex database include Intel Xeon W-2140B, Intel Xeon W-2145, Intel Core i7-9800X X-series, Intel Xeon W-2245 and Intel Xeon W-2135.