EPYC 9455P
EPYC 9555
EPYC 9455P vs EPYC 9555 Performance Spectrum
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 9555 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
Counter-Strike 2
League of Legends
Valorant
Among Us
Apex Legends
ARC Raiders
Baldur's Gate 3
Call of Duty: Black Ops 6
EPYC 9455P vs EPYC 9555: 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
2024Why buy it
- ✅Costs $5,007 less on MSRP ($4,819 MSRP vs $9,826 MSRP).
- ✅Delivers 78.9% more PassMark for each dollar spent, at 24.3 vs 13.6 PassMark/$ ($4,819 MSRP vs $9,826 MSRP).
- ✅Draws 300W instead of 360W, a 60W reduction.
Trade-offs
- ❌Lower PassMark (116,926 vs 133,253).
EPYC 9555
2024Why buy it
- ✅+14% higher PassMark.
Trade-offs
- ❌Lower PassMark per dollar, at 13.6 vs 24.3 PassMark/$ ($9,826 MSRP vs $4,819 MSRP).
- ❌20% higher power demand at 360W vs 300W.
Quick Answers
So, is EPYC 9555 better than EPYC 9455P?
Which one is better for gaming?
Which one is better for streaming, content creation, and heavy multitasking?
Which one is the smarter buy today, not just the cheaper CPU?
Which one is more future-proof for 2026 and beyond?
EPYC 9455P vs EPYC 9555 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 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.
Processing Power
The EPYC 9455P packs 48 cores / 96 threads, while the EPYC 9555 offers 64 cores / 128 threads — the EPYC 9555 has 16 more cores. Boost clocks reach 4.4 GHz on the EPYC 9455P versus 4.4 GHz on the EPYC 9555 — 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 9555's 133,253 — a 13.1% lead for the EPYC 9555. Both processors carry 256 MB (total) of L3 cache.
| Feature | EPYC 9455P | EPYC 9555 |
|---|---|---|
| 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 | 133,253+14% |
| Geekbench 6 Single | 1,962 | — |
| Geekbench 6 Multi | 1,898 | — |
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 9555).
| Feature | EPYC 9455P | EPYC 9555 |
|---|---|---|
| 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 9555 targets Data Center. Direct competitor: EPYC 9455P rivals Xeon 6766E; EPYC 9555 rivals Xeon 6972P.
| Feature | EPYC 9455P | EPYC 9555 |
|---|---|---|
| Integrated GPU | No | No |
| Virtualization | AMD-V, SEV-SNP | AMD-V, SEV-SNP |
| Target Use | Data Center / Single Socket | Data Center |
Value Analysis
At launch, the EPYC 9455P was priced at $4819, while the EPYC 9555 came in at $9826. On launch pricing ($4819 vs $9826), EPYC 9455P was $5007 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 9455P delivers 24.3 pts/$ vs 13.6 pts/$ for the EPYC 9555 — making the EPYC 9455P the 56.6% better value option.
| Feature | EPYC 9455P | EPYC 9555 |
|---|---|---|
| MSRP | $4819-51% | $9826 |
| Performance per Dollar | 24.3+79% | 13.6 |
| Release Date | 2024 | 2024 |
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