EPYC 9455P
Ryzen 9 5900X
EPYC 9455P vs Ryzen 9 5900X 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 Ryzen 9 5900X 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 Ryzen 9 5900X: 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
- ✅+300% larger total L3 cache (256 MB vs 64 MB).
- ✅Better for workstations and heavier parallel workloads: 48 cores / 96 threads, plus 128 PCIe lanes vs 24.
- ✅Newer platform on SP5 with DDR5 support instead of AM4 and DDR4.
- ✅433.3% more PCIe lanes (128 vs 24) for storage and expansion-heavy builds.
Trade-offs
- ❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
- ❌Lower Geekbench multi-core (1,898 vs 11,888).
- ❌Lower PassMark per dollar, at 24.3 vs 71.0 PassMark/$ ($4,819 MSRP vs $549 MSRP).
- ❌185.7% higher power demand at 300W vs 105W.
Ryzen 9 5900X
2020Why buy it
- ✅Better for gaming: +13.9% higher average FPS across 50 shared CPU benchmark tests.
- ✅Costs $4,270 less on MSRP ($549 MSRP vs $4,819 MSRP).
- ✅Delivers 192.4% more PassMark for each dollar spent, at 71.0 vs 24.3 PassMark/$ ($549 MSRP vs $4,819 MSRP).
- ✅Draws 105W instead of 300W, a 195W reduction.
Trade-offs
- ❌Smaller total L3 cache (64 MB vs 256 MB).
- ❌Less compelling for workstation-style loads than EPYC 9455P, which brings 48 cores / 96 threads and 128 PCIe lanes.
- ❌Older platform position on AM4 with DDR4, while EPYC 9455P moves to SP5 and DDR5.
Quick Answers
So, is Ryzen 9 5900X 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 Ryzen 9 5900X 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.
Ryzen 9 5900X
The Ryzen 9 5900X is manufactured by AMD. It was released in 5 November 2020 (5 years ago). It is based on the Vermeer (Zen3) (2020−2022) architecture. It features 12 cores and 24 threads. Base frequency is 3.7 GHz, with boost up to 4.8 GHz. L3 cache: 64 MB. L2 cache: 512K (per core). Built on 7 nm, 12 nm process technology. Socket: AM4. Thermal design power (TDP): 105 Watt. Memory support: DDR4-3200. Passmark benchmark score: 38,955 points. Launch price was $549.
Processing Power
The EPYC 9455P packs 48 cores / 96 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the EPYC 9455P has 36 more cores. Boost clocks reach 4.4 GHz on the EPYC 9455P versus 4.8 GHz on the Ryzen 9 5900X — a 8.7% clock advantage for the Ryzen 9 5900X (base: 3.15 GHz vs 3.7 GHz). The EPYC 9455P uses the Turin (2024) architecture (4 nm), while the Ryzen 9 5900X uses Vermeer (Zen3) (2020−2022) (7 nm, 12 nm). In PassMark, the EPYC 9455P scores 116,926 against the Ryzen 9 5900X's 38,955 — a 100% lead for the EPYC 9455P. Geekbench 6 single-core — the metric most relevant to gaming — records 1,962 vs 2,174, a 10.3% lead for the Ryzen 9 5900X that directly translates to higher frame rates. Multi-core Geekbench: 1,898 vs 11,888 (144.9% advantage for the Ryzen 9 5900X). L3 cache: 256 MB (total) on the EPYC 9455P vs 64 MB on the Ryzen 9 5900X.
| Feature | EPYC 9455P | Ryzen 9 5900X |
|---|---|---|
| Cores / Threads | 48 / 96+300% | 12 / 24 |
| Boost Clock | 4.4 GHz | 4.8 GHz+9% |
| Base Clock | 3.15 GHz | 3.7 GHz+17% |
| L3 Cache | 256 MB (total)+300% | 64 MB |
| L2 Cache | 1 MB (per core) | 512K (per core)+51100% |
| Process | 4 nm-43% | 7 nm, 12 nm |
| Architecture | Turin (2024) | Vermeer (Zen3) (2020−2022) |
| PassMark | 116,926+200% | 38,955 |
| Cinebench R23 Multi | — | 21,000 |
| Geekbench 6 Single | 1,962 | 2,174+11% |
| Geekbench 6 Multi | 1,898 | 11,888+526% |
Memory & Platform
The EPYC 9455P uses the SP5 socket (PCIe 5.0), while the Ryzen 9 5900X uses AM4 (PCIe 4.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6000 on the EPYC 9455P versus DDR4-3200 on the Ryzen 9 5900X — the EPYC 9455P supports 87.5% faster memory, which can translate to measurable gains in memory-sensitive workloads. The EPYC 9455P supports up to 9 TB of RAM compared to 128 GB — 7100% more capacity for professional workloads. Memory channels: 12 (EPYC 9455P) vs 2 (Ryzen 9 5900X). PCIe lanes: 128 (EPYC 9455P) vs 24 (Ryzen 9 5900X) — the EPYC 9455P offers 104 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP5 (EPYC 9455P) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).
| Feature | EPYC 9455P | Ryzen 9 5900X |
|---|---|---|
| Socket | SP5 | AM4 |
| PCIe Generation | PCIe 5.0+25% | PCIe 4.0 |
| Max RAM Speed | DDR5-6000+88% | DDR4-3200 |
| Max RAM Capacity | 9 TB+7100% | 128 GB |
| RAM Channels | 12+500% | 2 |
| ECC Support | Yes | Yes |
| PCIe Lanes | 128+433% | 24 |
Advanced Features
Virtualization support: AMD-V, SEV-SNP (EPYC 9455P) vs AMD-V (Ryzen 9 5900X). Primary use case: EPYC 9455P targets Data Center / Single Socket, Ryzen 9 5900X targets Workstation. Direct competitor: EPYC 9455P rivals Xeon 6766E; Ryzen 9 5900X rivals Core i9-12900K.
| Feature | EPYC 9455P | Ryzen 9 5900X |
|---|---|---|
| Integrated GPU | No | No |
| Unlocked | — | Yes |
| AVX-512 | — | No |
| Virtualization | AMD-V, SEV-SNP | AMD-V |
| Target Use | Data Center / Single Socket | Workstation |
Value Analysis
At launch, the EPYC 9455P was priced at $4819, while the Ryzen 9 5900X came in at $549. On launch pricing ($4819 vs $549), Ryzen 9 5900X was $4270 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 9455P delivers 24.3 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 98.1% better value option.
| Feature | EPYC 9455P | Ryzen 9 5900X |
|---|---|---|
| MSRP | $4819 | $549-89% |
| Performance per Dollar | 24.3 | 71.0+192% |
| Release Date | 2024 | 2020 |
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