Intel® Xeon™ 678X

The Intel Xeon 678X is a workstation processor with 48 cores and 96 threads, built on the Granite Rapids architecture (Intel 3 process). It launched in Jan 2026. Clocks run from 2.4 GHz base to 4.9 GHz boost. A 192-MB L3 cache backs the cores (6.1 MB per core). It addresses DDR5 memory up to 4 GB across 8 channels. The chip drops into the FCLGA4710 socket and exposes PCIe 5.0 (128 lanes). Rated TDP is 300 W. Notable platform capabilities: AMX, AVX-512, Extended Page Tables (EPT), Control-flow Enforcement (CET).

The Intel Xeon 678X scores 3,780 in single-core performance and 97,699 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 19,217 for overall performance, 68,796 for productivity performance, 60,538 for creator performance, 136,779 for engineering performance and 35,765 for gaming performance. Its multi-core throughput works out to 2,035 per core, 1,018 per thread and 326 per watt. Its computed efficiency index is 1,110. Its performance index is 238, so its overall performance is 138% above 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 Xeon 678X scores 405,075 in integer math, 362,070 in floating-point math, 1,690,896 in compression, 83,598 in cryptography, 7,809 in physics simulation, 141,431 in vector SIMD, 1,010 in the prime sieve and 164,102 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 588% above in integer math, 689% above in floating-point math, 641% above in compression, 628% above in cryptography, 616% above in physics simulation, 812% above in vector SIMD, 1,407% above in the prime sieve and 624% 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 Xeon 678X has 48 physical cores and runs 96 logical threads. It does not use a hybrid performance and efficiency core layout. It runs 2 threads per core. It runs at a base clock of 2.40 GHz and boosts up to 4.90 GHz.

The Intel Xeon 678X is a workstation processor, belongs to the Intel Xeon family, uses the Granite Rapids architecture, carries the codename Granite Rapids and is manufactured on a Intel 3 process. It launched in Jan 2026.

The Intel Xeon 678X has 5.25 MB of L1 cache, 96 MB of L2 cache and 192 MB of L3 cache. That adds up to about 293.3 MB of cache, or 6.11 MB per core. Each core has 2 MB of private L2 cache.

The Intel Xeon 678X has a 3-level cache hierarchy: L1 at 5.3 MB, L2 at 96 MB and L3 at 192 MB. L3 is the largest level and makes up about 65% of the cache listed here.

The Intel Xeon 678X supports DDR5 memory, addresses up to 4 GB of memory and uses 8 memory channels. It does not support DDR4 and LPDDR memory. It supports ECC memory.

The Intel Xeon 678X uses the FCLGA4710 socket, supports PCI Express 5.0 and provides up to 128 PCIe lanes.

The Intel Xeon 678X has a rated TDP of 300 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 Xeon 678X is manufactured by Intel. It launched at a price of $4,129.

The Intel Xeon 678X is also identified by the model number 678X and the processor number 678X.

Feex has recorded 62% of the specifications it tracks for the Intel Xeon 678X. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: Memory Bandwidth and Max Memory Speed. Graphics: Integrated Graphics, Graphics Model, Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. 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 and Foundry. Naming & Aliases: SKU and Part Number.

Processors that use the same FCLGA4710 socket as the Intel Xeon 678X and have the closest multi-core scores in the Feex database include Intel Xeon 6741P, Intel Xeon 6747P, Intel Xeon 696X, Intel Xeon 676X and Intel Xeon 6740P.