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EPYC 7643P vs EPYC 9255

CPUCPUGPUGPU
AMD

EPYC 7643P

48 Cores96 Thrd225 WWMax: 3.6 GHz2023
EPYC family
·······
Buy on Amazon
VS
AMD

EPYC 9255

24 Cores48 Thrd200 WWMax: 4.8 GHz2024
EPYC family
·······
Buy on Amazon

EPYC 7643P vs EPYC 9255 Performance Spectrum

EPYC 7643P
48 / 96
77,307
+2.0%
brand logoRyzen AI Max PRO 390
brand logoRyzen 9 9850HX
brand logoRyzen Threadripper PRO 7955WX
brand logoRyzen Threadripper PRO 9955WX
brand logoRyzen Threadripper 9960X
brand logoRyzen Threadripper 7970X
brand logoRyzen Threadripper PRO 7985WX
brand logoRyzen Threadripper 7980X
EPYC 9255
24 / 48
75,809
0.0%
brand logoRyzen 7 8840HX
brand logoRyzen 9 7900X3D
brand logoRyzen 9 7945HX3D
brand logoRyzen Threadripper PRO 5965WX
brand logoRyzen Threadripper 9960X
brand logoRyzen Threadripper 7970X
brand logoRyzen Threadripper PRO 7985WX
brand logoRyzen Threadripper 7980X

About PassMark

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

EPYC 7643P vs EPYC 9255 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Path of Exile 2

Path of Exile 2

1080P
EPYC 7643P
low195 FPS
medium159 FPS
high129 FPS
ultra100 FPS
1080P
EPYC 9255
low303 FPS
medium280 FPS
high231 FPS
ultra195 FPS
Counter-Strike 2

Counter-Strike 2

1080P
EPYC 7643P
low418 FPS
medium367 FPS
high299 FPS
ultra234 FPS
1080P
EPYC 9255
low717 FPS
medium614 FPS
high485 FPS
ultra421 FPS
League of Legends

League of Legends

1080P
EPYC 7643P
low837 FPS
medium698 FPS
high650 FPS
ultra574 FPS
1080P
EPYC 9255
low850 FPS
medium691 FPS
high625 FPS
ultra530 FPS
Valorant

Valorant

1080P
EPYC 7643P
low979 FPS
medium888 FPS
high765 FPS
ultra661 FPS
1080P
EPYC 9255
low1083 FPS
medium982 FPS
high862 FPS
ultra777 FPS
Among Us

Among Us

1080P
EPYC 7643P
low60 FPS
medium60 FPS
high60 FPS
ultra60 FPS
1080P
EPYC 9255
low60 FPS
medium60 FPS
high60 FPS
ultra60 FPS
Apex Legends

Apex Legends

1080P
EPYC 7643P
low300 FPS
medium300 FPS
high300 FPS
ultra300 FPS
1080P
EPYC 9255
low300 FPS
medium300 FPS
high300 FPS
ultra300 FPS
ARC Raiders

ARC Raiders

1080P
EPYC 7643P
low300 FPS
medium229 FPS
high207 FPS
ultra186 FPS
1080P
EPYC 9255
low299 FPS
medium229 FPS
high206 FPS
ultra186 FPS
Baldur's Gate 3

Baldur's Gate 3

1080P
EPYC 7643P
low250 FPS
medium221 FPS
high175 FPS
ultra139 FPS
1080P
EPYC 9255
low272 FPS
medium239 FPS
high188 FPS
ultra151 FPS
Call of Duty: Black Ops 6

Call of Duty: Black Ops 6

1080P
EPYC 7643P
low308 FPS
medium278 FPS
high258 FPS
ultra212 FPS
1080P
EPYC 9255
low367 FPS
medium328 FPS
high285 FPS
ultra244 FPS
Call of Duty: Warzone

Call of Duty: Warzone

1080P
EPYC 7643P
low234 FPS
medium206 FPS
high173 FPS
ultra161 FPS
1080P
EPYC 9255
low283 FPS
medium264 FPS
high223 FPS
ultra209 FPS
Check FPS with Custom Builds

EPYC 7643P vs EPYC 9255: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

EPYC 7643P

2023

Why buy it

  • ✅+2% higher PassMark.
  • ✅+100% larger total L3 cache (256 MB vs 128 MB).

Trade-offs

  • ❌Worse for gaming: lower average FPS than EPYC 9255 across 50 shared CPU benchmark tests.
  • ❌
    9.1% HIGHER MSRP
    $2,722 MSRPvs$2,495 MSRP
  • ❌Older platform position on SP3 with DDR4, while EPYC 9255 moves to SP5 and DDR5.

EPYC 9255

2024

Why buy it

  • ✅Better for gaming: +20.8% higher average FPS across 50 shared CPU benchmark tests.
  • ✅Costs $227 less on MSRP ($2,495 MSRP vs $2,722 MSRP).
  • ✅Draws 200W instead of 225W, a 25W reduction.
  • ✅Newer platform on SP5 with DDR5 support instead of SP3 and DDR4.

Trade-offs

  • ❌Lower PassMark (75,809 vs 77,307).
  • ❌Smaller total L3 cache (128 MB vs 256 MB).

Quick Answers

So, is EPYC 9255 better than EPYC 7643P?
It depends on what you want from the system. For gaming, EPYC 9255 is ahead with a 20.8% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, EPYC 7643P pulls ahead with 2% better PassMark. EPYC 7643P also has the bigger cache pool with 100% larger total L3 cache (256 MB vs 128 MB).
Which one is better for streaming, content creation, and heavy multitasking?
For streaming, content creation, and heavier multitasking, EPYC 7643P is the stronger fit. You are getting 2% better PassMark, backed by 48 cores and 96 threads. It also has the larger cache pool with 100% larger total L3 cache (256 MB vs 128 MB).
Which one is the smarter buy today, not just the cheaper CPU?
EPYC 9255 is the better buy right now. EPYC 9255 comes in $227 cheaper on MSRP at $2,495 MSRP versus $2,722 MSRP, and it still gives you a 20.8% average FPS lead across 50 shared CPU game tests in our data. The compromise is that EPYC 7643P is still stronger for heavier multi-core work with 2% better PassMark. It is also 7.0% better value on MSRP (30.4 vs 28.4 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.
Which one is more future-proof for 2026 and beyond?
EPYC 9255 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2024 vs 2023), a healthier platform with SP5 and DDR5 instead of SP3, and AVX-512 support for heavier modern compute workloads. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

EPYC 7643P vs EPYC 9255 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

AMD

EPYC 7643P

The EPYC 7643P is manufactured by AMD. It was released in 5 September 2023 (2 years ago). It is based on the Milan (2021−2023) architecture. It features 48 cores and 96 threads. Base frequency is 2.3 GHz, with boost up to 3.6 GHz. L3 cache: 256 MB (total). L2 cache: 512 kB (per core). Built on 7 nm process technology. Socket: SP3. Thermal design power (TDP): 225 Watt. Memory support: DDR4. Passmark benchmark score: 77,307 points. Launch price was $2,722.

AMD

EPYC 9255

The EPYC 9255 is manufactured by AMD. It was released in 10 October 2024 (1 year ago). It is based on the Turin (2024) architecture. It features 24 cores and 48 threads. Base frequency is 3.25 GHz, with boost up to 4.8 GHz. L3 cache: 128 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: SP5. Thermal design power (TDP): 200 Watt. Memory support: DDR5. Passmark benchmark score: 75,809 points. Launch price was $2,495.

⚡

Processing Power

The EPYC 7643P packs 48 cores / 96 threads, while the EPYC 9255 offers 24 cores / 48 threads — the EPYC 7643P has 24 more cores. Boost clocks reach 3.6 GHz on the EPYC 7643P versus 4.8 GHz on the EPYC 9255 — a 28.6% clock advantage for the EPYC 9255 (base: 2.3 GHz vs 3.25 GHz). The EPYC 7643P uses the Milan (2021−2023) architecture (7 nm), while the EPYC 9255 uses Turin (2024) (4 nm). In PassMark, the EPYC 7643P scores 77,307 against the EPYC 9255's 75,809 — a 2% lead for the EPYC 7643P. L3 cache: 256 MB (total) on the EPYC 7643P vs 128 MB (total) on the EPYC 9255.

FeatureEPYC 7643PEPYC 9255
Cores / Threads
48 / 96+100%
24 / 48
Boost Clock
3.6 GHz
4.8 GHz+33%
Base Clock
2.3 GHz
3.25 GHz+41%
L3 Cache
256 MB (total)+100%
128 MB (total)
L2 Cache
512 kB (per core)
1 MB (per core)+100%
Process
7 nm
4 nm-43%
Architecture
Milan (2021−2023)
Turin (2024)
PassMark
77,307+2%
75,809
🧠

Memory & Platform

The EPYC 7643P uses the SP3 socket (PCIe 4.0), while the EPYC 9255 uses SP5 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 3200 on the EPYC 7643P versus 4800 on the EPYC 9255 — the EPYC 9255 supports 50% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 9255 supports up to 6144 of RAM compared to 4096 — 50% more capacity for professional workloads. Memory channels: 8 (EPYC 7643P) vs 12 (EPYC 9255). Both provide 128 PCIe lanes. Chipset compatibility: SP3 (EPYC 7643P) and SP5 (EPYC 9255).

FeatureEPYC 7643PEPYC 9255
Socket
SP3
SP5
PCIe Generation
PCIe 4.0
PCIe 5.0+25%
Max RAM Speed
3200
4800+50%
Max RAM Capacity
4096
6144+50%
RAM Channels
8
12+50%
ECC Support
Yes
Yes
PCIe Lanes
128
128
🔧

Advanced Features

Neither processor supports overclocking. Only the EPYC 9255 supports AVX-512 instructions — important for machine learning and scientific applications. Virtualization support: VT-x, VT-d, SEV (EPYC 7643P) vs VT-x, VT-d, SEV-SNP (EPYC 9255). Direct competitor: EPYC 7643P rivals Xeon Platinum 8380; EPYC 9255 rivals Xeon Platinum 8480+.

FeatureEPYC 7643PEPYC 9255
Integrated GPU
No
No
IGPU Model
None
None
Unlocked
No
No
AVX-512
No
Yes
Virtualization
VT-x, VT-d, SEV
VT-x, VT-d, SEV-SNP
💰

Value Analysis

At launch, the EPYC 7643P was priced at $2722, while the EPYC 9255 came in at $2495. On launch pricing ($2722 vs $2495), EPYC 9255 was $227 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 7643P delivers 28.4 pts/$ vs 30.4 pts/$ for the EPYC 9255 — making the EPYC 9255 the 6.7% better value option.

FeatureEPYC 7643PEPYC 9255
MSRP
$2722
$2495-8%
Performance per Dollar
28.4
30.4+7%
Release Date
2023
2024
Search EPYC 7643P on AmazonSearch EPYC 9255 on Amazon

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