EPYC 9555 vs EPYC 9555P

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.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, productivity performance, platform differences, power efficiency, pricing context, and upgrade path so you can see which CPU actually makes more sense.

EPYC 9555

2024

Why buy it

Trade-offs

❌Lower PassMark (133,253 vs 135,441).
❌Lower PassMark per dollar, at 13.6 vs 17.0 PassMark/$ ($9,826 MSRP vs $7,983 MSRP).

EPYC 9555P

2024

Why buy it

✅+1.6% higher PassMark.
✅Costs $1,843 less on MSRP ($7,983 MSRP vs $9,826 MSRP).
✅Delivers 25.1% more PassMark for each dollar spent, at 17.0 vs 13.6 PassMark/$ ($7,983 MSRP vs $9,826 MSRP).

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

EPYC 9555

2024

EPYC 9555P

2024

Why buy it

✅+1.6% higher PassMark.
✅Costs $1,843 less on MSRP ($7,983 MSRP vs $9,826 MSRP).
✅Delivers 25.1% more PassMark for each dollar spent, at 17.0 vs 13.6 PassMark/$ ($7,983 MSRP vs $9,826 MSRP).

Trade-offs

❌Lower PassMark (133,253 vs 135,441).
❌Lower PassMark per dollar, at 13.6 vs 17.0 PassMark/$ ($9,826 MSRP vs $7,983 MSRP).

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is EPYC 9555P better than EPYC 9555?

Yes. EPYC 9555P is the better overall CPU here. You are getting 1.6% better PassMark and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

For gaming, the two CPUs are effectively a wash in the available data.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, EPYC 9555P is the better fit. You are getting 1.6% better PassMark, backed by 64 cores and 128 threads.

Which one is the smarter buy today, not just the cheaper CPU?

EPYC 9555P is the smarter buy today. EPYC 9555P is $1,843 cheaper on MSRP at $7,983 MSRP versus $9,826 MSRP, and it gives you 1.6% higher PassMark. It is also 25.1% better value on MSRP (17.0 vs 13.6 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

Which one is more future-proof for 2026 and beyond?

EPYC 9555P is the more future-proof choice for 2026 and beyond. You are getting more multi-core headroom with 64 cores / 128 threads instead of 64/128. That extra cache should hold up really well in CPU-limited games and high-refresh builds.

Games Benchmarks

Paired with RTX 4090

To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.

Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.

EPYC 9555 Benchmark Check

EPYC 9555P Benchmark Check

Path of Exile 2

Preset	EPYC 9555	EPYC 9555P
1080p
low	171 FPS	171 FPS
medium	142 FPS	142 FPS
high	122 FPS	122 FPS
ultra	99 FPS	99 FPS
1440p
low	150 FPS	150 FPS
medium	121 FPS	121 FPS
high	99 FPS	99 FPS
ultra	83 FPS	83 FPS
4K
low	84 FPS	84 FPS
medium	73 FPS	73 FPS
high	57 FPS	57 FPS
ultra	47 FPS	47 FPS

Open EPYC 9555 Open EPYC 9555P

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	EPYC 9555	EPYC 9555P
1080p
low	655 FPS	655 FPS
medium	566 FPS	566 FPS
high	459 FPS	459 FPS
ultra	397 FPS	397 FPS
1440p
low	546 FPS	546 FPS
medium	483 FPS	483 FPS
high	404 FPS	404 FPS
ultra	328 FPS	328 FPS
4K
low	331 FPS	331 FPS
medium	295 FPS	295 FPS
high	268 FPS	268 FPS
ultra	236 FPS	236 FPS

Open EPYC 9555 Open EPYC 9555P

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	EPYC 9555	EPYC 9555P
1080p
low	747 FPS	747 FPS
medium	634 FPS	634 FPS
high	590 FPS	590 FPS
ultra	519 FPS	519 FPS
1440p
low	561 FPS	561 FPS
medium	474 FPS	474 FPS
high	434 FPS	434 FPS
ultra	376 FPS	376 FPS
4K
low	405 FPS	405 FPS
medium	326 FPS	326 FPS
high	288 FPS	288 FPS
ultra	229 FPS	229 FPS

Open EPYC 9555 Open EPYC 9555P

League of Legends

League of Legends

Valorant

Preset	EPYC 9555	EPYC 9555P
1080p
low	1005 FPS	1005 FPS
medium	902 FPS	902 FPS
high	778 FPS	778 FPS
ultra	702 FPS	702 FPS
1440p
low	809 FPS	809 FPS
medium	704 FPS	704 FPS
high	603 FPS	603 FPS
ultra	533 FPS	533 FPS
4K
low	574 FPS	574 FPS
medium	510 FPS	510 FPS
high	447 FPS	447 FPS
ultra	392 FPS	392 FPS

Open EPYC 9555 Open EPYC 9555P

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of EPYC 9555 and EPYC 9555P

EPYC 9555

The EPYC 9555 is manufactured by AMD. It was released in 10 October 2024 (1 year ago). It is based on the Turin (2024) architecture. It features 64 cores and 128 threads. Base frequency is 3.2 GHz, with boost up to 4.4 GHz. L3 cache: 256 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: SP5. Thermal design power (TDP): 360 Watt. Memory support: DDR5. Passmark benchmark score: 133,253 points. Launch price was $9,826.

EPYC 9555P

The EPYC 9555P is manufactured by AMD. It was released in 10 October 2024 (1 year ago). It is based on the Turin (2024) architecture. It features 64 cores and 128 threads. Base frequency is 3.2 GHz, with boost up to 4.4 GHz. L3 cache: 256 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: SP5. Thermal design power (TDP): 360 Watt. Memory support: DDR5. Passmark benchmark score: 135,441 points. Launch price was $7,983.

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Processing Power

Both the EPYC 9555 and EPYC 9555P share an identical 64-core/128-thread configuration. Boost clocks reach 4.4 GHz on the EPYC 9555 versus 4.4 GHz on the EPYC 9555P — identical boost frequencies (base: 3.2 GHz vs 3.2 GHz). Both are built on the Turin (2024) architecture using a 4 nm process. In PassMark, the EPYC 9555 scores 133,253 against the EPYC 9555P's 135,441 — a 1.6% lead for the EPYC 9555P. Both processors carry 256 MB (total) of L3 cache.

Feature	EPYC 9555	EPYC 9555P
Cores / Threads	64 / 128	64 / 128
Boost Clock	4.4 GHz	4.4 GHz
Base Clock	3.2 GHz	3.2 GHz
L3 Cache	256 MB (total)	256 MB (total)
L2 Cache	1 MB (per core)	1 MB (per core)
Process	4 nm	4 nm
Architecture	Turin (2024)	Turin (2024)
PassMark	133,253	135,441+2%
Geekbench 6 Single	—	2,815
Geekbench 6 Multi	—	29,406

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Memory & Platform

Both processors use the SP5 socket with PCIe 5.0. Both support up to DDR5-6000 memory speed. Both support up to 6 TB of RAM. Both feature 12-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP5 (EPYC 9555) and SP5 (EPYC 9555P).

Feature	EPYC 9555	EPYC 9555P
Socket	SP5	SP5
PCIe Generation	PCIe 5.0	PCIe 5.0
Max RAM Speed	DDR5-6000	DDR5-6000
Max RAM Capacity	6 TB	6 TB
RAM Channels	12	12
ECC Support	Yes	Yes
PCIe Lanes	128	128

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Advanced Features

Both support AMD-V, SEV-SNP virtualization. Primary use case: EPYC 9555 targets Data Center, EPYC 9555P targets Data Center / Single Socket. Direct competitor: EPYC 9555 rivals Xeon 6972P; EPYC 9555P rivals Xeon 6979P.

Feature	EPYC 9555	EPYC 9555P
Integrated GPU	No	No
Virtualization	AMD-V, SEV-SNP	AMD-V, SEV-SNP
Target Use	Data Center	Data Center / Single Socket

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Value Analysis

The EPYC 9555 launched at $9826 MSRP, while the EPYC 9555P debuted at $7983. On MSRP ($9826 vs $7983), the EPYC 9555P is $1843 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 9555 delivers 13.6 pts/$ vs 17.0 pts/$ for the EPYC 9555P — making the EPYC 9555P the 22.3% better value option.