EPYC 9555 vs EPYC 9455P
EPYC 9555
EPYC 9455P
Performance Spectrum - CPU
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.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar EPYC 9555
Performance Per Dollar EPYC 9455P
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | EPYC 9555 | EPYC 9455P |
|---|---|---|
| Gaming | Balanced gaming performance | Balanced gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ⚠️ Higher cost ($7,973) | ✅ More affordable ($4,366) |
| Longevity | ✨ Modern (Turin (2024) / 4 nm) | ✨ Modern (Turin (2024) / 4 nm) |
💎 Value Proposition
| Insight | EPYC 9555 | EPYC 9455P |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+60%) |
| Upfront Cost | ⚠️ Higher cost ($7,973) | ✅ More affordable ($4,366) |
Performance Check
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.
Technical Specifications
Side-by-side comparison of EPYC 9555 and EPYC 9455P
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 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.
Processing Power
The EPYC 9555 packs 64 cores / 128 threads, while the EPYC 9455P offers 48 cores / 96 threads — the EPYC 9555 has 16 more cores. Boost clocks reach 4.4 GHz on the EPYC 9555 versus 4.4 GHz on the EPYC 9455P — identical boost frequencies (base: 3.2 GHz vs 3.15 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 9455P's 116,926 — a 13.1% lead for the EPYC 9555. Both processors carry 256 MB (total) of L3 cache.
| Feature | EPYC 9555 | EPYC 9455P |
|---|---|---|
| Cores / Threads | 64 / 128+33% | 48 / 96 |
| Boost Clock | 4.4 GHz | 4.4 GHz |
| Base Clock | 3.2 GHz+2% | 3.15 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+14% | 116,926 |
| 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 — 40% more capacity for professional workloads. Both feature 12-channel memory with ECC support. Both provide 128 PCIe lanes. Chipset compatibility: SP5 (EPYC 9555) and SP5 (EPYC 9455P).
| Feature | EPYC 9555 | EPYC 9455P |
|---|---|---|
| Socket | SP5 | SP5 |
| PCIe Generation | PCIe 5.0 | PCIe 5.0 |
| Max RAM Speed | DDR5-6000 | DDR5-6000 |
| Max RAM Capacity | 6 TB | 9 TB+50% |
| RAM Channels | 12 | 12 |
| ECC Support | ✅ | ✅ |
| PCIe Lanes | 128 | 128 |
Advanced Features
Both support AMD-V, SEV-SNP virtualization. Primary use case: EPYC 9555 targets Data Center, EPYC 9455P targets Data Center / Single Socket. Direct competitor: EPYC 9555 rivals Xeon 6972P; EPYC 9455P rivals Xeon 6766E.
| Feature | EPYC 9555 | EPYC 9455P |
|---|---|---|
| Integrated GPU | No | No |
| Virtualization | AMD-V, SEV-SNP | AMD-V, SEV-SNP |
| Target Use | Data Center | Data Center / Single Socket |
Value Analysis
The EPYC 9555 launched at $9826 MSRP, while the EPYC 9455P debuted at $4819. At current prices ($7973 vs $4366), the EPYC 9455P is $3607 cheaper. In terms of value (PassMark points per dollar), the EPYC 9555 delivers 16.7 pts/$ vs 26.8 pts/$ for the EPYC 9455P — making the EPYC 9455P the 46.3% better value option.
| Feature | EPYC 9555 | EPYC 9455P |
|---|---|---|
| MSRP | $9826 | $4819-51% |
| Avg Price (30d) | $7973 | $4366-45% |
| Performance per Dollar | 16.7 | 26.8+60% |
| Release Date | 2024 | 2024 |
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