AMD® EPYC™ 9755

The AMD EPYC 9755 is a server processor with 128 cores and 256 threads, built on the Zen 5 architecture (4nm process). It launched in Oct 2024. Clocks run from 2.7 GHz base to 4.1 GHz boost. A 512-MB L3 cache backs the cores (5.1 MB per core). It supports DDR5 memory. The chip drops into the SP5 socket and exposes PCIe 5.0. Rated TDP is 500 W. Notable platform capabilities: AVX-512, AMD-V (Hardware Virtualization), AMD SEV.

The AMD EPYC 9755 scores 3,526 in single-core performance and 150,848 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 23,063 for overall performance, 102,988 for productivity performance, 89,313 for creator performance, 211,187 for engineering performance and 48,290 for gaming performance. Its multi-core throughput works out to 1,179 per core, 589 per thread and 302 per watt. Its computed efficiency index is 1,031. Its performance index is 286, so its overall performance is 186% 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 AMD EPYC 9755 scores 1,496,464 in integer math, 920,037 in floating-point math, 4,488,549 in compression, 270,333 in cryptography, 15,727 in physics simulation, 312,770 in vector SIMD, 1,541 in the prime sieve and 415,615 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 2,441% above in integer math, 1,904% above in floating-point math, 1,868% above in compression, 2,253% above in cryptography, 1,343% above in physics simulation, 1,917% above in vector SIMD, 2,200% above in the prime sieve and 1,735% 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 AMD EPYC 9755 has 128 physical cores and runs 256 logical threads. It runs 2 threads per core. It runs at a base clock of 2.70 GHz and boosts up to 4.10 GHz.

The AMD EPYC 9755 is a server processor, belongs to the AMD EPYC family, uses the Zen 5 architecture, carries the codename Turin and is manufactured on a 4nm process. It launched in Oct 2024.

The AMD EPYC 9755 has 9.92 MB of L1 cache, 128 MB of L2 cache and 512 MB of L3 cache. That adds up to about 649.9 MB of cache, or 5.08 MB per core. Each core has 1 MB of private L2 cache.

The AMD EPYC 9755 has a 3-level cache hierarchy: L1 at 9.9 MB, L2 at 128 MB and L3 at 512 MB. L3 is the largest level and makes up about 79% of the cache listed here.

The AMD EPYC 9755 supports DDR5 memory, uses 12 memory channels, runs memory at up to 6,400 MT/s and delivers up to 614.4 GB/s of memory bandwidth. It does not support DDR4 and LPDDR memory.

The AMD EPYC 9755 does not include integrated graphics, so a discrete graphics card is required for display output.

The AMD EPYC 9755 uses the SP5 socket and supports PCI Express 5.0.

The AMD EPYC 9755 has a rated TDP of 500 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 AMD EPYC 9755 is manufactured by TSMC. It launched at a price of $12,984.

The AMD EPYC 9755 is also identified by the model number 9755 and the SKU 100-000001443.

After an audit, 1 value was corrected on the AMD EPYC 9755 record. Each change is listed with its old value, new value, rule and sources.

• PassMark benchmark row: 13 values re-read (PassMark multi-thread rating 166,328 → 150,848; PassMark single-thread rating 3,503 → 3,526; PassMark source URL passmark://tables/passmark_cpu_scores.xlsx → https://www.cpubenchmark.net/cpu.php?cpu=AMD+EPYC+9755&id=6702; Integer math Not recorded → 1,496,464; Floating-point math Not recorded → 920,037; Prime numbers Not recorded → 1,541; String sorting Not recorded → 415,615; Data encryption Not recorded → 270,333; Data compression Not recorded → 4,488,549; Physics Not recorded → 15,727; Extended instructions Not recorded → 312,770; PassMark single thread Not recorded → 3,526; Snapshot date Not recorded → 2026-09-30). Rule: Benchmark row re-read from the exact PassMark page. source_url has no id= and CPU Mark 166328 is 10% off the list (150848); values from id page 6702. Sources: Vendor page (amd.com); PassMark: AMD EPYC 9755; Wikipedia: Epyc (revision 1377481559).

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

Feex has recorded 60% of the specifications it tracks for the AMD EPYC 9755. 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: ECC Memory. Platform & Compatibility: Package, Package Size and PCIe Lanes. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size and Die Count. Naming & Aliases: Processor Number and Part Number.

Processors that use the same SP5 socket as the AMD EPYC 9755 and have the closest multi-core scores in the Feex database include AMD EPYC 9845, AMD EPYC 9575F, AMD EPYC 9655, AMD EPYC 9655P and AMD EPYC 9965.