EPYC 9455P vs EPYC 9555P

EPYC 9455P vs EPYC 9555P Performance Spectrum

EPYC 9455P

48 / 96

116,926

0.0%

Ryzen Threadripper 3970X

Ryzen Threadripper PRO 5975WX

Ryzen Threadripper 7960X

Ryzen Threadripper 7970X

Ryzen Threadripper PRO 7985WX

Ryzen Threadripper 7980X

Ryzen Threadripper 9980X

Ryzen Threadripper PRO 9985WX

EPYC 9555P

64 / 128

135,441

+15.8%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper PRO 5975WX

Ryzen Threadripper 7960X

Ryzen Threadripper 7970X

Ryzen Threadripper 9970X

Ryzen Threadripper 9980X

Ryzen Threadripper PRO 9985WX

Ryzen Threadripper PRO 9995WX

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 9455P vs EPYC 9555P 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.

EPYC 9455P vs EPYC 9555P: Pros, Cons & Final Verdict

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

EPYC 9455P

2024

Why buy it

✅Costs $3,164 less on MSRP ($4,819 MSRP vs $7,983 MSRP).
✅Delivers 43.0% more PassMark for each dollar spent, at 24.3 vs 17.0 PassMark/$ ($4,819 MSRP vs $7,983 MSRP).
✅Draws 300W instead of 360W, a 60W reduction.

Trade-offs

❌Lower Geekbench single-core performance for gaming (1,962 vs 2,815).
❌Lower Geekbench multi-core (1,898 vs 29,406).

EPYC 9555P

2024

Why buy it

✅+43.5% higher Geekbench single-core performance for gaming and desktop responsiveness.

Trade-offs

❌Lower PassMark per dollar, at 17.0 vs 24.3 PassMark/$ ($7,983 MSRP vs $4,819 MSRP).
❌20% higher power demand at 360W vs 300W.

Quick Answers

So, is EPYC 9555P better than EPYC 9455P?

Yes. EPYC 9555P is the better all-around CPU here. It gives you a 0.7% average FPS lead across 50 shared CPU game tests in our data, 1449.3% better Geekbench multi-core, 15.8% higher PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, EPYC 9555P is the better pick. According to our tests, it delivers 0.7% more average FPS across 50 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, EPYC 9555P is the stronger fit. You are getting 1449.3% better Geekbench multi-core, backed by 64 cores and 128 threads.

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

EPYC 9555P is still the faster CPU overall, but EPYC 9455P is easier to justify if budget matters more than peak performance. EPYC 9555P comes in 65.7% more expensive on MSRP at $7,983 MSRP versus $4,819 MSRP, and it still gives you a 0.7% average FPS lead across 50 shared CPU game tests in our data. EPYC 9455P is also 43.0% better value on MSRP (24.3 vs 17.0 PassMark/$), which is why it can still make sense for tighter-budget builds on paper.

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

EPYC 9555P makes more sense long term for 2026 and beyond. You are getting more multi-core headroom with 64 cores / 128 threads instead of 48/96. That extra cache should keep paying off in CPU-limited games and high-refresh builds.

EPYC 9455P vs EPYC 9555P Technical Specifications

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

EPYC 9455P

The EPYC 9455P is manufactured by AMD. It was released in 10 October 2024 (1 year ago). It is based on the Turin (2024) architecture. It features 48 cores and 96 threads. Base frequency is 3.15 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): 300 Watt. Memory support: DDR5. Passmark benchmark score: 116,926 points. Launch price was $4,819.

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.

⚡

Processing Power

The EPYC 9455P packs 48 cores / 96 threads, while the EPYC 9555P offers 64 cores / 128 threads — the EPYC 9555P has 16 more cores. Boost clocks reach 4.4 GHz on the EPYC 9455P versus 4.4 GHz on the EPYC 9555P — identical boost frequencies (base: 3.15 GHz vs 3.2 GHz). Both are built on the Turin (2024) architecture using a 4 nm process. In PassMark, the EPYC 9455P scores 116,926 against the EPYC 9555P's 135,441 — a 14.7% lead for the EPYC 9555P. Geekbench 6 single-core — the metric most relevant to gaming — records 1,962 vs 2,815, a 35.7% lead for the EPYC 9555P that directly translates to higher frame rates. Multi-core Geekbench: 1,898 vs 29,406 (175.7% advantage for the EPYC 9555P). Both processors carry 256 MB (total) of L3 cache.

Feature	EPYC 9455P	EPYC 9555P
Cores / Threads	48 / 96	64 / 128+33%
Boost Clock	4.4 GHz	4.4 GHz
Base Clock	3.15 GHz	3.2 GHz+2%
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	116,926	135,441+16%
Geekbench 6 Single	1,962	2,815+43%
Geekbench 6 Multi	1,898	29,406+1449%

🧠

Memory & Platform

Both processors use the SP5 socket with PCIe 5.0. Both support up to DDR5-6000 memory speed. The EPYC 9455P supports up to 9 TB of RAM compared to 6 TB — 50% more capacity for professional workloads. Both feature 12-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP5 (EPYC 9455P) and SP5 (EPYC 9555P).

Feature	EPYC 9455P	EPYC 9555P
Socket	SP5	SP5
PCIe Generation	PCIe 5.0	PCIe 5.0
Max RAM Speed	DDR5-6000	DDR5-6000
Max RAM Capacity	9 TB+50%	6 TB
RAM Channels	12	12
ECC Support	Yes	Yes
PCIe Lanes	128	128

🔧

Advanced Features

Both support AMD-V, SEV-SNP virtualization. Primary use case: EPYC 9455P targets Data Center / Single Socket, EPYC 9555P targets Data Center / Single Socket. Direct competitor: EPYC 9455P rivals Xeon 6766E; EPYC 9555P rivals Xeon 6979P.

Feature	EPYC 9455P	EPYC 9555P
Integrated GPU	No	No
Virtualization	AMD-V, SEV-SNP	AMD-V, SEV-SNP
Target Use	Data Center / Single Socket	Data Center / Single Socket

💰

Value Analysis

At launch, the EPYC 9455P was priced at $4819, while the EPYC 9555P came in at $7983. On launch pricing ($4819 vs $7983), EPYC 9455P was $3164 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 9455P delivers 24.3 pts/$ vs 17.0 pts/$ for the EPYC 9555P — making the EPYC 9455P the 35.4% better value option.

Feature	EPYC 9455P	EPYC 9555P
MSRP	$4819-40%	$7983
Performance per Dollar	24.3+43%	17.0
Release Date	2024	2024

Search EPYC 9455P on Amazon

Search EPYC 9555P on Amazon

Affiliate Disclosure

ChipVERSUS is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. We may earn a commission on qualifying purchases made through our links. This comes at no additional cost to you and helps support our work in providing comprehensive PC building guides and tools.

Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.