AMD EPYC 7313 vs AMD Ryzen 9 9900X Comparison

The AMD Ryzen 9 9900X and the AMD EPYC 7313 are both 92nd-percentile CPUs, yet they achieve that standing through entirely different means. The Ryzen 9 9900X is a desktop processor that wins 11 of 15 head-to-head benchmarks, while the EPYC 7313 is a server chip that takes 4 wins, including the crucial multi-core Cinebench R23 test. The data shows a clear split: the 9900X dominates general compute and single-threaded tasks, whereas the EPYC 7313 holds its ground in specific render workloads and physics simulations.

Where Each One Wins

The Ryzen 9 9900X is the decisive winner in almost every category that measures raw computational throughput. In PassMark’s integer math test, it scores 181,056 against the EPYC’s 143,648, a 26% advantage. The gap widens further in floating-point math, where the 9900X posts 120,083 versus 78,748, a 52.5% lead. Extended instruction workloads show the biggest disparity: the 9900X scores 55,243, which is 65.2% higher than the EPYC’s 33,430. Data compression is another clear victory, with the 9900X delivering 683,579 points compared to 525,507, a 30.1% margin. These results indicate the 9900X is the superior choice for software compilation, scientific computation, and any workload that relies on heavy arithmetic.

The EPYC 7313’s wins are narrower but significant. It takes Cinebench R23 multi-core with a score of 32,847 versus 32,172, a 2.1% edge that reflects its 16 cores and 32 threads. It also wins Cinebench R15 single-core decisively, scoring 467 against 353, a 24.4% advantage. PassMark physics is another EPYC win, 3,899 to 3,381, a 13.3% margin. The most striking EPYC victory is in Cinebench R23 single-core, where it scores 4,637 against the 9900X’s 2,253, a 51.4% blowout. This suggests that for certain legacy single-threaded render tasks, the EPYC’s Zen 3 architecture holds an unexpected edge over Zen 5.

The Verdict

Choose the AMD Ryzen 9 9900X if your work involves mixed compute, data processing, or general desktop productivity. The benchmark data shows it is faster in 11 of 15 head-to-head tests, with leads ranging from 4.8% in data encryption to 94.5% in single-thread PassMark. Its 12 cores and 24 threads, combined with a 5.60 GHz boost clock, make it a versatile performer for applications that scale across threads but also demand strong single-thread responsiveness. The 9900X also offers integrated Radeon Graphics, which the EPYC lacks, and its 89.6 GB/s memory bandwidth is ample for most desktop tasks.

Choose the AMD EPYC 7313 if your priority is sustained multi-core rendering or specific server-side physics calculations. Despite being older and built on 7 nm versus the 9900X’s 4 nm, the EPYC’s 16 cores and 32 threads deliver a 2.1% win in Cinebench R23 multi-core. Its 128 MB of shared L3 cache and eight-channel DDR4 memory provide 204.8 GB/s of bandwidth, which is 2.3 times the 9900X’s figure. The EPYC also wins Cinebench R23 single-core by a massive 51.4%, a result that defies its lower 3.70 GHz boost clock. This makes it the pick for workloads that mirror those specific Cinebench tests, even if it loses elsewhere.

Head-to-Head Benchmarks

The most lopsided result is PassMark single-thread, where the 9900X scores 4,672 against the EPYC’s 2,402, a 94.5% advantage. This is a direct reflection of the 9900X’s 5.60 GHz boost clock versus the EPYC’s 3.70 GHz, and it carries over to real-world responsiveness. Extended instructions show a 65.2% lead for the 9900X, underscoring its advantage in SIMD-heavy code. Floating-point math is another dominant 9900X win, 120,083 to 78,748, a 52.5% margin that speaks to its Zen 5 architecture’s efficiency.

The EPYC’s biggest win is Cinebench R23 single-core, where it scores 4,637 versus 2,253, a 51.4% lead. This is puzzling given the 9900X’s higher clock speed, but the data is unambiguous. The EPYC also wins Cinebench R15 single-core, 467 to 353, a 24.4% margin. In multi-core Cinebench R23, the EPYC edges out the 9900X, 32,847 to 32,172, a 2.1% win that highlights its core-count advantage. PassMark physics is the fourth EPYC win, 3,899 to 3,381, a 13.3% margin, which may indicate better thread scheduling in that specific test.

The 9900X wins all remaining benchmarks. PassMark multithread shows a 41.4% lead, 54,643 to 38,644. Prime number finding is 40.6% faster on the 9900X, 436 to 310. Data compression is 30.1% faster, and integer math is 26% faster. Random string sorting is 24.4% faster, and data encryption is 4.8% faster. These consistent wins across diverse workloads confirm that the 9900X is the more balanced performer.

FAQ

Q: Which CPU has a higher average benchmark score?

A: The Ryzen 9 9900X has an average benchmark score of 57,498, while the EPYC 7313 scores 57,399. The delta is 0.2% in favor of the 9900X.

Q: How do they compare in single-threaded performance?

A: The 9900X wins PassMark single-thread by 94.5%, scoring 4,672 versus 2,402. However, the EPYC wins Cinebench R23 single-core by 51.4%, scoring 4,637 versus 2,253. Results are test-dependent.

Q: What is the core and thread count difference?

A: The EPYC 7313 has 16 cores and 32 threads, while the Ryzen 9 9900X has 12 cores and 24 threads. The EPYC has 33% more cores.

Q: Which CPU supports faster memory?

A: The Ryzen 9 9900X supports DDR5 with dual-channel memory and 89.6 GB/s bandwidth. The EPYC 7313 supports DDR4 with eight-channel memory and 204.8 GB/s bandwidth.

Q: Are both CPUs still in production?

A: Yes, both the Ryzen 9 9900X and the EPYC 7313 have an active production status according to the data.

Q: Which CPU has a higher boost clock?

A: The Ryzen 9 9900X boosts to 5.60 GHz, while the EPYC 7313 boosts to 3.70 GHz. The 9900X is 1.9 GHz faster.

Architecture Differences

The two CPUs come from different architectural generations. The Ryzen 9 9900X is built on Zen 5 with the Granite Ridge codename and uses a 4 nm process from TSMC. The EPYC 7313 is Zen 3 with the Milan codename and uses a 7 nm process. The transistor counts are nearly identical, 16,630 million for the 9900X and 16,600 million for the EPYC, but the die layout differs: the 9900X uses 2x 70.6 mm² dies while the EPYC uses 4x 81 mm² dies.

Cache hierarchies are distinct. The 9900X has 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of L3. The EPYC has 64 KB of L1 per core, 512 KB of L2 per core, and 128 MB of shared L3. This gives the EPYC double the L3 cache, which benefits certain server workloads. The 9900X integrates Radeon Graphics, while the EPYC has no integrated GPU. Both support ECC memory, a rare feature for a desktop chip.

The PCIe capabilities are drastically different. The 9900X offers Gen 5 with 24 lanes from the CPU, while the EPYC offers Gen 4 with 128 lanes. This makes the EPYC far more suitable for multi-GPU or high-density storage configurations. The EPYC also uses the SP3 socket, while the 9900X uses AM5, meaning they are not interchangeable in any system.

Specification Differences

The most obvious specification difference is market segment: the 9900X is a Desktop part, while the EPYC 7313 is Server/Workstation. This is reflected in their sockets, with the 9900X on AM5 and the EPYC on SP3. The 9900X has an unlocked multiplier, while the EPYC is locked. Their launch MSRPs differ, with the 9900X at $499 and the EPYC at $1083.

The 9900X has a base clock of 4.40 GHz and a boost of 5.60 GHz, compared to the EPYC’s 3.00 GHz base and 3.70 GHz boost. The 9900X has a TDP of 120 watts, while the EPYC has a TDP of 155 watts. The 9900X supports DDR5 memory in a dual-channel configuration, while the EPYC supports DDR4 in an eight-channel configuration. Memory bandwidth is 89.6 GB/s for the 9900X and 204.8 GB/s for the EPYC.

The 9900X has 12 cores and 24 threads, while the EPYC has 16 cores and 32 threads. The 9900X has 80 KB L1 and 1 MB L2 per core, while the EPYC has 64 KB L1 and 512 KB L2 per core. L3 cache is 64 MB on the 9900X versus 128 MB on the EPYC. The 9900X uses a 4 nm process, while the EPYC uses 7 nm. The 9900X has integrated graphics, while the EPYC does not. The 9900X was released on 2024-08-14, while the EPYC was released on 2021-03-14.