AMD EPYC 8124P vs AMD Ryzen 9 9900X3D Comparison

The benchmark data presents an unambiguous outcome: the AMD Ryzen 9 9900X3D outperforms the AMD EPYC 8124P in every single recorded test. The Ryzen 9 9900X3D wins 17 benchmarks, while the EPYC 8124P records zero wins. This performance gap is substantial and consistent across all workload types, ranging from single-threaded tasks to heavily multithreaded rendering and computational workloads.

Head-to-Head Benchmarks

The most dramatic difference appears in single-threaded performance. In the PassMark single-thread test, the Ryzen 9 9900X3D scores 4646 against the EPYC 8124P's 2271, a 104.6% advantage. This is not a marginal gap; the desktop processor is more than twice as fast in this metric. The Cinebench single-core results follow the same pattern, with the Ryzen 9 9900X3D leading by 56.1% in Cinebench R15 (679 vs 435) and by 56% in both Cinebench R20 (2830 vs 1814) and Cinebench R23 (6739 vs 4321).

Multi-threaded performance tells a similar story, though the margins are slightly smaller. The Ryzen 9 9900X3D leads by 55.9% in Cinebench R15 multi-core (4811 vs 3085), by 56% in Cinebench R20 multi-core (20049 vs 12856), and by 55.9% in Cinebench R23 multi-core (47737 vs 30611). The PassMark multithread score shows a 55.9% advantage for the Ryzen 9 9900X3D as well (56154 vs 36014). This consistency across different rendering engines is notable; the performance ratio remains remarkably stable regardless of the benchmark generation.

Some workloads show even larger deltas. The PassMark extended instructions test shows the Ryzen 9 9900X3D leading by 86.8% (55426 vs 29666), while the find prime numbers test shows a 145% advantage (544 vs 222). Floating point math favors the Ryzen 9 9900X3D by 65.2% (119622 vs 72395), and integer math shows a 45.5% lead (179727 vs 123513). The physics test shows a 59.1% advantage for the Ryzen 9 9900X3D (5340 vs 3356).

The narrowest margins appear in data encryption and random string sorting. The Ryzen 9 9900X3D leads data encryption by just 8.3% (33282 vs 30743), and random string sorting by 12.2% (71864 vs 64067). Data compression shows a 46.3% advantage for the Ryzen 9 9900X3D (685074 vs 468411). Even in these closer contests, the desktop chip remains ahead.

Architecture Differences

The two processors come from different architectural lineages, which explains the performance divide. The Ryzen 9 9900X3D uses Zen 5 architecture, codenamed Granite Ridge, built on a 4 nm process at TSMC. The EPYC 8124P uses Zen 4c architecture, codenamed Siena, built on a 5 nm process, also at TSMC. The process node difference gives the Ryzen 9 9900X3D a density and efficiency advantage.

Core counts differ in an unexpected direction. The EPYC 8124P has 16 cores and 32 threads, while the Ryzen 9 9900X3D has 12 cores and 24 threads. Despite having fewer cores, the Ryzen 9 9900X3D wins every multi-threaded benchmark. This indicates the per-core performance advantage of Zen 5 outweighs the EPYC's additional four cores. Clock speeds reinforce this: the Ryzen 9 9900X3D has a base clock of 4.40 GHz and a boost clock of 5.50 GHz, compared to the EPYC 8124P's 2.45 GHz base and 3.00 GHz boost. The desktop chip runs significantly faster at every point.

Cache configurations also differ substantially. The Ryzen 9 9900X3D has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and 128 MB of L3 cache. The EPYC 8124P has 64 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3 cache. The Ryzen 9 9900X3D has double the L3 capacity and larger per-core L1. The EPYC 8124P uses more transistors (17,750 million vs 16,630 million) across a slightly larger die (2x 73 mm² vs 2x 70.6 mm²), but that does not translate into a performance advantage in these tests.

Memory architecture is a major differentiator. The Ryzen 9 9900X3D uses a dual-channel DDR5 memory bus with 89.6 GB/s bandwidth. The EPYC 8124P uses a six-channel DDR5 memory bus with 230.4 GB/s bandwidth. The EPYC has 2.57 times the memory bandwidth of the Ryzen 9 9900X3D, which is crucial for server workloads, though it does not appear to help in the recorded benchmarks. Both support ECC memory. The EPYC 8124P offers 96 PCIe Gen 5 lanes, while the Ryzen 9 9900X3D offers 24 PCIe Gen 5 lanes; this is a significant expansion capability difference.

The Ryzen 9 9900X3D includes integrated Radeon Graphics, while the EPYC 8124P has no integrated graphics. The Ryzen 9 9900X3D has an unlocked multiplier, whereas the EPYC 8124P is locked. The Ryzen 9 9900X3D uses AMD Socket AM5, while the EPYC 8124P uses AMD Socket SP6. The Ryzen 9 9900X3D has a TDP of 120 watts, while the EPYC 8124P has a TDP of 125 watts.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 8124P has 16 cores and 32 threads, while the AMD Ryzen 9 9900X3D has 12 cores and 24 threads.

Q: Is the EPYC 8124P ever faster in the recorded benchmarks?

A: No. The Ryzen 9 9900X3D wins all 17 head-to-head benchmark comparisons. The EPYC 8124P does not win a single test.

Q: How large is the single-threaded performance gap?

A: In the PassMark single-thread test, the Ryzen 9 9900X3D scores 4646 versus the EPYC 8124P's 2271, a 104.6% advantage. Cinebench single-core tests show a consistent lead of about 56% for the Ryzen 9 9900X3D.

Q: Does the EPYC 8124P have any advantages in memory capacity or expansion?

A: Yes. The EPYC 8124P supports six-channel DDR5 memory with 230.4 GB/s bandwidth, versus the Ryzen 9 9900X3D's dual-channel 89.6 GB/s. The EPYC also has 96 PCIe Gen 5 lanes versus 24 on the Ryzen 9 9900X3D.

Q: What is the process node difference between the two?

A: The Ryzen 9 9900X3D is built on a 4 nm process, while the EPYC 8124P is built on a 5 nm process. Both are manufactured by TSMC.

Q: Does the Ryzen 9 9900X3D have integrated graphics?

A: Yes, it includes Radeon Graphics. The EPYC 8124P has no integrated graphics.

Q: How do their average benchmark scores compare?

A: The Ryzen 9 9900X3D has an average benchmark score of 54762, while the EPYC 8124P has an average of 52121. Both are in the 91st percentile of all CPUs.

The Verdict

The data supports a clear conclusion: the AMD Ryzen 9 9900X3D is the superior processor for every benchmarked workload. It wins all 17 head-to-head comparisons, with margins ranging from 8.3% in data encryption to 145% in prime number finding. The Ryzen 9 9900X3D achieves this despite having fewer cores (12 vs 16), which demonstrates the strength of its Zen 5 architecture, higher clock speeds, and larger cache.

The EPYC 8124P does have legitimate strengths outside the benchmark suite. Its six-channel memory bus provides 230.4 GB/s of bandwidth, nearly three times the Ryzen 9 9900X3D's 89.6 GB/s. Its 96 PCIe Gen 5 lanes allow for far more expansion than the Ryzen 9 9900X3D's 24 lanes. These features matter for server deployments where memory throughput and I/O capacity are critical. The EPYC 8124P also carries a launch MSRP of $639, compared to the Ryzen 9 9900X3D's launch MSRP of $599.

For users who prioritize raw computational performance, the Ryzen 9 9900X3D is the obvious choice. It dominates in rendering, math operations, data compression, and single-threaded workloads. The EPYC 8124P is better suited for environments that require extensive memory bandwidth and massive PCIe expansion, where its benchmark deficits may be acceptable trade-offs.

Specification Differences

The two processors differ in nearly every major specification category. The Ryzen 9 9900X3D has 12 cores and 24 threads, while the EPYC 8124P has 16 cores and 32 threads. The Ryzen 9 9900X3D has a base clock of 4.40 GHz and a boost clock of 5.50 GHz; the EPYC 8124P has a base clock of 2.45 GHz and a boost clock of 3.00 GHz. The Ryzen 9 9900X3D has a TDP of 120 watts, the EPYC 8124P has a TDP of 125 watts.

The Ryzen 9 9900X3D uses Zen 5 architecture on a 4 nm process with the Granite Ridge codename. The EPYC 8124P uses Zen 4c architecture on a 5 nm process with the Siena codename. The Ryzen 9 9900X3D has 16,630 million transistors on a 2x 70.6 mm² die; the EPYC 8124P has 17,750 million transistors on a 2x 73 mm² die.

Cache configurations differ: the Ryzen 9 9900X3D has 80 KB L1 per core and 128 MB L3, while the EPYC 8124P has 64 KB L1 per core and 64 MB shared L3. Both have 1 MB L2 per core. The Ryzen 9 9900X3D uses dual-channel memory with 89.6 GB/s bandwidth; the EPYC 8124P uses six-channel memory with 230.4 GB/s bandwidth. Both support DDR5 and ECC memory. The Ryzen 9 9900X3D has 24 PCIe Gen 5 lanes and integrated Radeon Graphics; the EPYC 8124P has 96 PCIe Gen 5 lanes and no integrated graphics.

The Ryzen 9 9900X3D fits AMD Socket AM5, while the EPYC 8124P fits AMD Socket SP6. The Ryzen 9 9900X3D has an unlocked multiplier; the EPYC 8124P is locked. The Ryzen 9 9900X3D was released on 2025-01-05, while the EPYC 8124P was released on 2023-09-17. Both are active production parts.

Where Each One Wins

The Ryzen 9 9900X3D wins in every benchmark category recorded. For single-threaded applications, the advantage is overwhelming: a 104.6% lead in PassMark single-thread and roughly 56% in Cinebench single-core tests. This makes it the better choice for responsive desktop use, software compilation, and any workload that depends on per-core speed. For multi-threaded rendering, the Ryzen 9 9900X3D leads by about 56% across all Cinebench versions, making it stronger for content creation despite its lower core count. Mathematical workloads also favor the Ryzen 9 9900X3D, with a 145% lead in prime number finding, 65.2% in floating point math, and 45.5% in integer math.

The EPYC 8124P does not win any benchmark, but its platform features define its use case. The six-channel memory bus with 230.4 GB/s bandwidth and 96 PCIe Gen 5 lanes make it suited for server environments with heavy memory traffic and extensive peripheral connectivity. Its 16 cores and 32 threads provide thread capacity, and its server market segment designation reflects its intended role in data center infrastructure. Users who need massive memory bandwidth, high lane counts for storage or networking expansion, and server-grade reliability should consider the EPYC 8124P. Users who need maximum benchmark performance in desktop or workstation scenarios should choose the Ryzen 9 9900X3D. The recorded data shows no benchmark scenario where the EPYC 8124P offers a performance advantage.