AMD EPYC 4344P vs AMD Ryzen 9 3900X Comparison

The Verdict

The AMD Ryzen 9 3900X and AMD EPYC 4344P occupy different positions in the database, despite both sitting at the 89th percentile among all CPUs. The Ryzen 9 3900X, a 12-core desktop part from the 3000 series, wins 4 of the 15 head-to-head benchmarks, while the EPYC 4344P, an 8-core server/workstation chip from the EPYC 4004 series, takes the remaining 11. The average benchmark scores tell a close story: the 3900X records 46487 against the EPYC's 45122, a gap of roughly 3%. However, the distribution of wins matters more than the average. The EPYC 4344P dominates modern rendering workloads, posting a 33.6% lead in Cinebench R23 multi-core and a 66.1% lead in single-core. The 3900X fights back in data compression, encryption, and prime number finding, where its extra cores and larger L3 cache prove decisive. Users who prioritize threaded server-style tasks such as compression or encryption should favor the 3900X. Users who need strong multi-core rendering and vastly better single-thread performance should choose the EPYC 4344P. The EPYC also carries a launch MSRP of $329, while the 3900X launched at $499, but the two parts target different sockets and platforms entirely.

Architecture Differences

The two processors come from different generations and foundry nodes. The Ryzen 9 3900X uses Zen 2 architecture on the Matisse codename, built on a 7 nm process at TSMC with 7,600 million transistors across a dual-chip design measuring 2x 74 mm². The EPYC 4344P uses Zen 4 architecture on the Raphael codename, built on a 5 nm process at TSMC with 6,570 million transistors on a single 71 mm² die. The node shrink explains much of the EPYC's efficiency and clock advantage. Core counts differ: the 3900X provides 12 cores and 24 threads, while the EPYC 4344P provides 8 cores and 16 threads. Both share a base clock of 3.80 GHz, but the boost clocks diverge sharply: the 3900X reaches 4.60 GHz, while the EPYC 4344P boosts to 5.30 GHz. The TDP reflects the efficiency gap, with the 3900X rated at 105 W and the EPYC at 65 W.

Cache hierarchies also differ. The 3900X has 64 KB of L1 per core, 512 KB of L2 per core, and a 64 MB L3 cache. The EPYC 4344P has the same 64 KB L1 per core, but doubles L2 to 1 MB per core, and drops L3 to 32 MB shared. The 3900X's larger L3 likely contributes to its wins in compression and encryption. Memory support moves from DDR4 on a dual-channel bus with 51.2 GB/s bandwidth on the 3900X to DDR5 on a dual-channel bus with 83.2 GB/s bandwidth on the EPYC. ECC memory is absent on the 3900X but present on the EPYC, which fits its server/workstation segment. PCIe capability also advances: the 3900X offers Gen 4 with 24 lanes, while the EPYC offers Gen 5 with 28 lanes. The EPYC includes integrated Radeon Graphics; the 3900X has none. The 3900X has an unlocked multiplier, while the EPYC does not. Sockets differ completely: the 3900X uses AMD Socket AM4, and the EPYC uses AMD Socket AM5. The release dates are separated by nearly five years, with the 3900X launching on 2019-07-06 and the EPYC on 2024-05-20.

Head-to-Head Benchmarks

The largest single-core gap in the database appears in Cinebench R23 single-core, where the EPYC 4344P scores 4042 against the 3900X's 1370, a 66.1% advantage. Cinebench R15 single-core tells the same story: 407 for the EPYC versus 207 for the 3900X, a 49.1% lead. PassMark single-thread results show 3526 for the EPYC versus 2703 for the 3900X, a 23.3% margin. These results align with the EPYC's 5.30 GHz boost clock and Zen 4 architecture.

Multi-core rendering reverses the single-core trend in absolute terms. In Cinebench R23 multi-core, the EPYC scores 28636 against the 3900X's 19000, a 33.6% lead, despite having only 8 cores versus 12. The EPYC also wins Cinebench R15 multi-core by a smaller margin? No, the data shows the 3900X wins Cinebench R15 multi-core with 3049 against 2886, a 5.6% lead. The newer R23 benchmark favors the EPYC heavily, while the older R15 test favors the 3900X slightly. This suggests the EPYC's per-core efficiency matters more in the newer workload.

The 3900X's wins come in specific PassMark tests. Data compression: 448906 versus 402701, an 11.5% lead. Data encryption: 28586 versus 24476, a 16.8% lead. Find prime numbers: 214 versus 165, a 29.7% lead. These three workloads benefit from the 3900X's 12 cores and 64 MB L3 cache. The EPYC wins the remaining PassMark tests: extended instructions 29582 versus 29221 (1.2%), floating point math 63309 versus 58434 (7.7%), integer math 105779 versus 99628 (5.8%), multithread 33325 versus 32544 (2.3%), physics 1987 versus 1794 (9.7%), and random string sorting 49001 versus 48300 (1.4%). The multithread result is close, with the EPYC only 2.3% ahead despite having fewer cores. The EPYC's higher clocks and newer architecture offset the core deficit.

Specification Differences

The two processors differ in nearly every specification field. Cores: 12 versus 8. Threads: 24 versus 16. Boost clock: 4.60 GHz versus 5.30 GHz. TDP: 105 W versus 65 W. Socket: AM4 versus AM5. Architecture: Zen 2 versus Zen 4. Process node: 7 nm versus 5 nm. Transistors: 7,600 million versus 6,570 million. Die size: 2x 74 mm² versus 71 mm². L2 cache per core: 512 KB versus 1 MB. L3 cache: 64 MB versus 32 MB. Memory support: DDR4 versus DDR5. Memory bandwidth: 51.2 GB/s versus 83.2 GB/s. ECC memory: false versus true. PCIe: Gen 4, 24 lanes versus Gen 5, 28 lanes. Integrated graphics: none versus Radeon Graphics. Market segment: Desktop versus Server/Workstation. Multiplier unlocked: true versus false. Release date: 2019-07-06 versus 2024-05-20. Part numbers differ: 100-000000023100-100000023BOX100-100000023MPK versus 100-000001479. Base clock and L1 cache are identical at 3.80 GHz and 64 KB per core, respectively. Both have dual-channel memory buses and come from TSMC, but the process nodes differ.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen 9 3900X has 12 cores and 24 threads, while the AMD EPYC 4344P has 8 cores and 16 threads.

Q: Which processor is faster in single-threaded benchmarks?

A: The AMD EPYC 4344P leads in every single-thread test. It scores 4042 in Cinebench R23 single-core versus 1370 for the 3900X, a 66.1% advantage, and 3526 in PassMark single-thread versus 2703, a 23.3% advantage.

Q: Does the Ryzen 9 3900X win any benchmarks?

A: Yes, the 3900X wins 4 of the 15 head-to-head tests: Cinebench R15 multi-core (3049 versus 2886, 5.6%), PassMark data compression (448906 versus 402701, 11.5%), PassMark data encryption (28586 versus 24476, 16.8%), and PassMark find prime numbers (214 versus 165, 29.7%).

Q: Which processor supports ECC memory?

A: The AMD EPYC 4344P supports ECC memory, while the AMD Ryzen 9 3900X does not.

Q: What are the memory and PCIe differences?

A: The 3900X supports DDR4 on a dual-channel bus with 51.2 GB/s bandwidth and PCIe Gen 4 with 24 lanes. The EPYC 4344P supports DDR5 on a dual-channel bus with 83.2 GB/s bandwidth and PCIe Gen 5 with 28 lanes.

Q: Which processor has integrated graphics?

A: The AMD EPYC 4344P includes Radeon Graphics. The AMD Ryzen 9 3900X has no integrated graphics.

Where Each One Wins

The Ryzen 9 3900X wins in data compression, where its 448906 score beats the EPYC's 402701 by 11.5%. It also wins in data encryption, with 28586 versus 24476, a 16.8% margin, and in find prime numbers, with 214 versus 165, a 29.7% lead. The 3900X also takes Cinebench R15 multi-core, scoring 3049 against 2886. These wins cluster around workloads that exploit its 12 cores and 64 MB L3 cache. The older Zen 2 architecture appears well suited to compression and encryption tasks, and the larger cache likely helps the prime number test. Users running data-heavy server tasks on an AM4 platform should consider the 3900X.

The EPYC 4344P wins in modern rendering and single-thread workloads. Its Cinebench R23 multi-core score of 28636 beats the 3900X by 33.6%, and its Cinebench R23 single-core score of 4042 beats 1370 by 66.1%. PassMark results favor the EPYC in physics (1987 versus 1794), integer math (105779 versus 99628), floating point math (63309 versus 58434), multithread (33325 versus 32544), random string sorting (49001 versus 48300), extended instructions (29582 versus 29221), and single-thread (3526 versus 2703). The EPYC also offers DDR5 memory bandwidth at 83.2 GB/s, PCIe Gen 5 with 28 lanes, ECC memory support, and a 65 W TDP. The server/workstation segment designation and integrated Radeon Graphics make it a more complete platform for modern AM5 builds. It wins 11 of the 15 head-to-head tests, making it the stronger overall performer in the database, despite the 3900X's higher average score of 46487 versus 45122.