CPU Showdown

Core i9-9920XvsEPYC 9755

The Core i9-9920X is a 12-core desktop HEDT chip for single-threaded tasks and older software, while the EPYC 9755 is a 128-core server monster meant for massive parallel workloads and virtualization.

Intel Core i9-9920X
12C / 24T · 165W
VS
AMD EPYC 9755
128C / 256T · 500W
Intel

Core i9-9920X

Skylake (server) · 14 nm · 2018

15score
3.8/ 5
0 votes
Cores / Threads
12 / 24
TDP
165W
Boost Clock
4.5 GHz
L3 Cache
19.25 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.

Core i9-9920X
15
EPYC 9755Winner
100
EPYC 9755 leads by 566.7% in aggregate performance.
Where they rank overall
#1EPYC 9755100
#2Ryzen Threadripper 9980X86
#163Core i7-14701TE15
#164Core i9-9920X15
#165Core i9-11900KF15
Technical Specifications

Side-by-Side Specs

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

SpecsCore i9-9920XEPYC 9755
Cores
Total Cores12128
Threads24256
Base Clock3.5 GHz2.7 GHz
Boost Clock4.5 GHz4.1 GHz
Cache
L2 Cache12 MB128 MB
L3 Cache19.25 MB512 MB
Platform
SocketFCLGA2066SP5
PCIePCIe 3.0PCIe 5.0
Power
Base TDP165W500W
General
ArchitectureSkylake (server)Turin
Process14 nm4 nm
Verdict

Which should you buy?

Winner overall

The EPYC 9755 crushes the Core i9-9920X overall with vastly more cores and memory for heavy server workloads.

Best value

For budget/value buyers, the older Core i9-9920X is the smarter pick if you only need basic multi-threading at lower cost.

When the other wins

The Core i9-9920X is the right choice for a legacy workstation where software lacks support for the EPYC's massive core count.

FAQ

Frequently asked questions

Is the Core i9-9920X better than the EPYC 9755?

Overall the EPYC 9755 is the stronger processor: it ranks higher in our aggregate performance score (100 vs 15 out of 100), so it leads the Core i9-9920X in most workloads.

How much faster is the EPYC 9755 than the Core i9-9920X?

Based on our aggregated benchmark scores the EPYC 9755 is roughly 567% faster than the Core i9-9920X overall. The real-world gap varies by game, resolution and settings.

Which should you buy, the Core i9-9920X or the EPYC 9755?

If you want the most performance, pick the EPYC 9755. If the Core i9-9920X 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.