CPU Showdown

Ryzen 9 3900XvsEPYC 9755

The AMD EPYC 9755 is a server-grade behemoth built for massive data centers and virtualization, while the Ryzen 9 3900X is a desktop chip for gamers and content creators.

AMD Ryzen 9 3900X
12C / 24T · 105W
VS
AMD EPYC 9755
128C / 256T · 500W
AMD

Ryzen 9 3900X

Matisse (Zen 2) · 7 nm · 2019

20score
4.6/ 5
0 votes
Cores / Threads
12 / 24
TDP
105W
Boost Clock
4.6 GHz
L3 Cache
64 MB

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AMD

EPYC 9755

Turin · 4 nm · 2024

100score
2.8/ 5
0 votes
Cores / Threads
128 / 256
TDP
500W
Boost Clock
4.1 GHz
L3 Cache
512 MB

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Aggregate Performance

Overall Performance Score

A unified score from combined synthetic and real-world benchmarks. 100 represents the fastest desktop CPU available.

Ryzen 9 3900X
20
EPYC 9755Winner
100
EPYC 9755 leads by 400.0% in aggregate performance.
Where they rank overall
#1EPYC 9755100
#2Ryzen Threadripper 9980X86
#88Core i7-13700E20
#89Ryzen 9 3900X20
#90Ryzen 9 3900XT20
Technical Specifications

Side-by-Side Specs

Every detail compared. Highlighted cells indicate the leading value for that metric.

SpecsRyzen 9 3900XEPYC 9755
Cores
Total Cores12128
Threads24256
Base Clock3.8 GHz2.7 GHz
Boost Clock4.6 GHz4.1 GHz
Cache
L2 Cache6 MB128 MB
L3 Cache64 MB512 MB
Platform
SocketAM4SP5
MemoryDDR4DDR5
PCIePCIe 5.0
Power
Base TDP105W500W
General
ArchitectureMatisse (Zen 2)Turin
Process7 nm4 nm
Verdict

Which should you buy?

Winner overall

The EPYC 9755 wins overall for server workloads needing extreme multi-core performance, but the Ryzen 9 3900X is the better desktop choice for everyday use.

Best value

For budget buyers, the Ryzen 9 3900X is the smarter pick, offering ample processing power at a fraction of the cost.

When the other wins

If you need a quiet, energy-efficient PC for gaming and office tasks, the Ryzen 9 3900X is the right choice over the EPYC 9755.

FAQ

Frequently asked questions

Is the Ryzen 9 3900X better than the EPYC 9755?

Overall the EPYC 9755 is the stronger processor: it ranks higher in our aggregate performance score (100 vs 20 out of 100), so it leads the Ryzen 9 3900X in most workloads.

How much faster is the EPYC 9755 than the Ryzen 9 3900X?

Based on our aggregated benchmark scores the EPYC 9755 is roughly 400% faster than the Ryzen 9 3900X overall. The real-world gap varies by game, resolution and settings.

Which should you buy, the Ryzen 9 3900X or the EPYC 9755?

If you want the most performance, pick the EPYC 9755. If the Ryzen 9 3900X is meaningfully cheaper where you shop, it can be the better value for similar real-world results — check current prices and the full spec comparison above before deciding.