CPU Showdown

Core i5-8400TvsEPYC 9755

The Core i5-8400T is a low-power, six-core desktop chip for basic office work and media PCs, while the EPYC 9755 is a 128-core server monster built for heavy data centers and cloud computing.

Intel Core i5-8400T
6C / 6T · 35W
VS
AMD EPYC 9755
128C / 256T · 500W
Intel

Core i5-8400T

Coffee Lake · 14 nm · 2018

4score
3.9/ 5
0 votes
Cores / Threads
6 / 6
TDP
35W
Boost Clock
3.3 GHz
L3 Cache
9 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 i5-8400T
4
EPYC 9755Winner
100
EPYC 9755 leads by 2400.0% in aggregate performance.
Where they rank overall
#1EPYC 9755100
#2Ryzen Threadripper 9980X86
#419Athlon Gold PRO 3150G4
#420Core i5-8400T4
#421Core i3-93204
Technical Specifications

Side-by-Side Specs

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

SpecsCore i5-8400TEPYC 9755
Cores
Total Cores6128
Threads6256
Base Clock1.7 GHz2.7 GHz
Boost Clock3.3 GHz4.1 GHz
Cache
L2 Cache1.5 MB128 MB
L3 Cache9 MB512 MB
Platform
SocketFCLGA1151SP5
PCIePCIe 3.0PCIe 5.0
iGPUIntel UHD Graphics 630
Power
Base TDP35W500W
General
ArchitectureCoffee LakeTurin
Process14 nm4 nm
Verdict

Which should you buy?

Winner overall

The EPYC 9755 dominates overall for heavy workloads, while the Core i5-8400T only suits low-power, basic tasks.

Best value

For budget buyers needing low power and everyday use, the Core i5-8400T is the smarter pick despite far less performance.

When the other wins

The Core i5-8400T is the right choice for a silent home server or office PC where power draw and heat matter most.

FAQ

Frequently asked questions

Is the Core i5-8400T better than the EPYC 9755?

Overall the EPYC 9755 is the stronger processor: it ranks higher in our aggregate performance score (100 vs 4 out of 100), so it leads the Core i5-8400T in most workloads.

How much faster is the EPYC 9755 than the Core i5-8400T?

Based on our aggregated benchmark scores the EPYC 9755 is roughly 2400% faster than the Core i5-8400T overall. The real-world gap varies by game, resolution and settings.

Which should you buy, the Core i5-8400T or the EPYC 9755?

If you want the most performance, pick the EPYC 9755. If the Core i5-8400T 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.