AMD EPYC 8124P vs AMD Ryzen 9 7900X Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen 9 7900X leads with an average benchmark score of 53,288, while the AMD EPYC 8124P trails at 52,121. Both sit at the 91st percentile versus all CPUs, placing them in the same performance tier, but the Ryzen holds a measurable overall edge.

Q: How do the two compare in single-threaded performance?

A: The Ryzen 9 7900X dominates the PassMark single-thread test with a score of 4,238 versus the EPYC's 2,271, a 86.6% advantage. However, in Cinebench R23 single-core, the EPYC 8124P scores 4,321 against the Ryzen's 2,016.5, giving the EPYC a 53.3% lead. This discrepancy suggests the two tests emphasize different aspects of single-core throughput.

Q: Which chip wins in multi-threaded workloads?

A: The results split by test. In Cinebench R23 multicore, the EPYC 8124P scores 30,611 versus the Ryzen's 29,300, a 4.3% win. Yet in PassMark multithread, the Ryzen scores 51,406 against the EPYC's 36,014, a 42.7% advantage. The Cinebench result favors the EPYC's 16 cores, while PassMark multithread aligns more with the Ryzen's higher clock speeds.

Q: What about memory bandwidth and capacity?

A: The EPYC 8124P features a six-channel DDR5 memory bus delivering 230.4 GB/s, compared to the Ryzen's dual-channel 83.2 GB/s. This 2.77x bandwidth advantage is a major differentiator for the server chip in memory-intensive tasks.

Q: Are there differences in expansion capabilities?

A: Yes. The EPYC 8124P provides PCIe Gen 5 with 96 lanes (CPU only), while the Ryzen 9 7900X offers PCIe Gen 5 with 24 lanes (CPU only). The EPYC offers four times the lane count, catering to multi-GPU or high-speed storage configurations.

Q: Which processor has higher power consumption?

A: The Ryzen 9 7900X has a TDP of 170 watts, while the EPYC 8124P has a TDP of 125 watts. The EPYC delivers more cores at a lower power envelope, though the Ryzen's higher TDP reflects its aggressive clock speeds.

The Verdict

The data points to a clear split: the Ryzen 9 7900X is the choice for raw single-threaded execution and most general compute tasks, while the EPYC 8124P serves scenarios demanding core count and memory bandwidth. The Ryzen wins 11 of 15 head-to-head benchmarks, including decisive victories in PassMark single-thread (86.6%), extended instructions (60.5%), and prime number finding (74.8%). For users running desktop applications, compile workloads, or any task that benefits from high boost clocks (5.60 GHz on the Ryzen versus 3.00 GHz on the EPYC), the Ryzen is the clear pick.

The EPYC 8124P, however, takes the Cinebench R23 multicore crown (30,611 vs 29,300) and wins in Cinebench R15 single-core (435 vs 323) and PassMark physics (3,356 vs 3,060). Its six-channel memory bus delivers 230.4 GB/s, a 2.77x bandwidth advantage, making it superior for data-heavy server workloads like virtualization or large in-memory databases. The EPYC also offers 96 PCIe Gen 5 lanes versus 24, enabling far more expansion. With a launch MSRP of $639 for the EPYC versus $549 for the Ryzen, the price difference reflects the server-targeted feature set, but the benchmark data shows the Ryzen offers stronger average performance per dollar in compute-heavy tasks.

Head-to-Head Benchmarks

The largest victory for the Ryzen 9 7900X comes in PassMark single-thread, where it scores 4,238 against the EPYC's 2,271, a 86.6% delta. This is the single biggest gap in the entire comparison. The Ryzen also crushes the EPYC in PassMark extended instructions (47,619 vs 29,666, a 60.5% lead) and prime number finding (388 vs 222, a 74.8% lead). These results stem from the Ryzen's 5.60 GHz boost clock versus the EPYC's 3.00 GHz, a 2.6 GHz difference that manifests in clock-sensitive workloads.

In Cinebench R15 multicore, the Ryzen posts 4,820.5 versus the EPYC's 3,085, a 56.3% advantage. This is an older benchmark that scales well with per-core frequency, and the Ryzen's 12 cores at 5.60 GHz outperform the EPYC's 16 cores at 3.00 GHz. Similarly, PassMark floating-point math sees the Ryzen ahead by 43.6% (103,952 vs 72,395), and integer math by 37% (169,273 vs 123,513).

The EPYC 8124P's biggest win is in Cinebench R23 single-core, where it scores 4,321 versus the Ryzen's 2,016.5, a 53.3% margin. This is surprising given the Ryzen's higher boost clock, but the data is clear. The EPYC also takes Cinebench R23 multicore (30,611 vs 29,300, a 4.3% lead) and PassMark physics (3,356 vs 3,060, an 8.8% lead). In Cinebench R15 single-core, the EPYC wins 435 to 323, a 25.7% margin.

The Ryzen's remaining wins include PassMark data compression (632,505 vs 468,411, a 35% lead), data encryption (37,263 vs 30,743, a 21.2% lead), and random string sorting (74,658 vs 64,067, a 16.5% lead). Across all 15 benchmarks, the Ryzen averages a 42.7% lead in PassMark multithread, further cementing its position for general compute.

Specification Differences

The core and thread counts differ: the Ryzen 9 7900X has 12 cores and 24 threads, while the EPYC 8124P has 16 cores and 32 threads. Clock speeds diverge sharply; the Ryzen's base clock is 4.70 GHz and boost is 5.60 GHz, while the EPYC's base is 2.45 GHz and boost is 3.00 GHz. TDP also differs, with the Ryzen at 170 watts and the EPYC at 125 watts.

Sockets are distinct: the Ryzen uses AMD Socket AM5, while the EPYC uses AMD Socket SP6. The Ryzen has an integrated Radeon Graphics unit; the EPYC has none. The Ryzen's multiplier is unlocked, allowing overclocking, while the EPYC's is locked. The Ryzen's memory bus is dual-channel, versus the EPYC's six-channel, and memory bandwidth is 83.2 GB/s versus 230.4 GB/s. PCIe lanes differ: 24 Gen 5 lanes on the Ryzen versus 96 Gen 5 lanes on the EPYC. Release dates also differ, with the Ryzen launching on 2022-09-26 and the EPYC on 2023-09-17.

Architecture Differences

Both processors use TSMC's 5 nm process node, but they implement different Zen variants. The Ryzen 9 7900X uses Zen 4 architecture under the codename Raphael, while the EPYC 8124P uses Zen 4c under the codename Siena. The transistor counts differ: the Ryzen has 13,140 million transistors across a 2x 71 mm² die size, while the EPYC has 17,750 million transistors across a 2x 73 mm² die size. The EPYC packs 35% more transistors into a slightly larger die, reflecting the denser Zen 4c design.

Cache configurations are identical: both have 64 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3. The core architectures differ in density and clock behavior, with Zen 4c optimized for higher core counts at lower frequencies, while Zen 4 targets higher clocks per core. The Ryzen's integrated Radeon Graphics is absent on the EPYC, which relies on discrete GPUs. The EPYC's six-channel memory controller and 96 PCIe lanes are architectural features aimed at server workloads, while the Ryzen's dual-channel and 24 lanes serve desktop needs.

Where Each One Wins

The Ryzen 9 7900X wins in 11 of 15 head-to-head benchmarks, making it the preferred choice for single-threaded and lightly threaded tasks. Its 86.6% lead in PassMark single-thread and 74.8% lead in prime number finding indicate exceptional performance in legacy or frequency-dependent applications. The Ryzen also leads in data compression (35%), encryption (21.2%), and extended instructions (60.5%), covering a broad range of everyday compute, from file archiving to cryptographic workloads. Its floating-point and integer math wins (43.6% and 37%) make it strong for scientific computing and general number crunching.

The EPYC 8124P wins in Cinebench R23 multicore (4.3% lead) and Cinebench R23 single-core (53.3% lead), along with Cinebench R15 single-core (25.7%) and PassMark physics (8.8%). The R23 multicore win, despite fewer clock speed advantages, shows the EPYC's 16 cores can outmuscle the Ryzen's 12 in a modern rendering workload. The EPYC's six-channel memory bus and 230.4 GB/s bandwidth make it the choice for memory-bound server tasks like virtualization, large database caching, or high-performance computing clusters. Its 96 PCIe Gen 5 lanes support extensive I/O expansion, suitable for multi-GPU compute nodes or NVMe storage arrays. The EPYC's lower TDP of 125 watts also makes it more power-efficient per core, an advantage in dense server deployments where cooling and power budgets are constrained.