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 9555P

2024

Why buy it

✅+147.4% higher Geekbench multi-core.
✅+300% larger total L3 cache (256 MB vs 64 MB).
✅Better for workstations and heavier parallel workloads: 64 cores / 128 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 PassMark per dollar, at 17.0 vs 71.0 PassMark/$ ($7,983 MSRP vs $549 MSRP).
❌242.9% higher power demand at 360W vs 105W.

Ryzen 9 5900X

2020

Why buy it

✅Better for gaming: +13.1% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $7,434 less on MSRP ($549 MSRP vs $7,983 MSRP).
✅Delivers 318.2% more PassMark for each dollar spent, at 71.0 vs 17.0 PassMark/$ ($549 MSRP vs $7,983 MSRP).
✅Draws 105W instead of 360W, a 255W reduction.

Trade-offs

❌Lower Geekbench multi-core (11,888 vs 29,406).
❌Smaller total L3 cache (64 MB vs 256 MB).
❌Less compelling for workstation-style loads than EPYC 9555P, which brings 64 cores / 128 threads and 128 PCIe lanes.
❌Older platform position on AM4 with DDR4, while EPYC 9555P moves to SP5 and DDR5.

EPYC 9555P

2024

Ryzen 9 5900X

2020

Why buy it

✅+147.4% higher Geekbench multi-core.
✅+300% larger total L3 cache (256 MB vs 64 MB).
✅Better for workstations and heavier parallel workloads: 64 cores / 128 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.

Why buy it

✅Better for gaming: +13.1% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $7,434 less on MSRP ($549 MSRP vs $7,983 MSRP).
✅Delivers 318.2% more PassMark for each dollar spent, at 71.0 vs 17.0 PassMark/$ ($549 MSRP vs $7,983 MSRP).
✅Draws 105W instead of 360W, a 255W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen 9 5900X across 50 shared CPU benchmark tests.
❌Lower PassMark per dollar, at 17.0 vs 71.0 PassMark/$ ($7,983 MSRP vs $549 MSRP).
❌242.9% higher power demand at 360W vs 105W.

Trade-offs

❌Lower Geekbench multi-core (11,888 vs 29,406).
❌Smaller total L3 cache (64 MB vs 256 MB).
❌Less compelling for workstation-style loads than EPYC 9555P, which brings 64 cores / 128 threads and 128 PCIe lanes.
❌Older platform position on AM4 with DDR4, while EPYC 9555P moves to SP5 and DDR5.

Quick Answers

So, is EPYC 9555P better than Ryzen 9 5900X?

Not in a simple one-size-fits-all way. EPYC 9555P makes more sense for workstation-style multi-core throughput, while Ryzen 9 5900X is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

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 147.4% better Geekbench multi-core, backed by 64 cores and 128 threads. It also carries the larger cache pool with 300% larger total L3 cache (256 MB vs 64 MB).

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

EPYC 9555P is still the faster CPU overall, but Ryzen 9 5900X makes more sense if price matters more than absolute performance. EPYC 9555P is 1354.1% more expensive on MSRP at $7,983 MSRP versus $549 MSRP, and it gives you 147.4% better Geekbench multi-core. The trade-off is that Ryzen 9 5900X is still the better pure gaming CPU with a 13.1% average FPS lead across 50 shared CPU game tests in our data. Ryzen 9 5900X is also 318.2% better value on MSRP (71.0 vs 17.0 PassMark/$), which is why it is easier to justify for price-conscious builds 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 a newer CPU generation (2024 vs 2020), a healthier platform with SP5 and DDR5 instead of AM4, 300% larger total L3 cache (256 MB vs 64 MB), and more multi-core headroom with 64 cores / 128 threads instead of 12/24. That should give you a better long-term upgrade path for motherboard, RAM, and future CPU swaps.

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 9555P Benchmark Check

Ryzen 9 5900X Benchmark Check

Path of Exile 2

Preset	EPYC 9555P	Ryzen 9 5900X
1080p
low	171 FPS	323 FPS
medium	142 FPS	291 FPS
high	122 FPS	243 FPS
ultra	99 FPS	193 FPS
1440p
low	150 FPS	307 FPS
medium	121 FPS	248 FPS
high	99 FPS	192 FPS
ultra	83 FPS	157 FPS
4K
low	84 FPS	193 FPS
medium	73 FPS	156 FPS
high	57 FPS	115 FPS
ultra	47 FPS	103 FPS

Open EPYC 9555P Open Ryzen 9 5900X

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	EPYC 9555P	Ryzen 9 5900X
1080p
low	655 FPS	772 FPS
medium	566 FPS	647 FPS
high	459 FPS	508 FPS
ultra	397 FPS	450 FPS
1440p
low	546 FPS	619 FPS
medium	483 FPS	536 FPS
high	404 FPS	443 FPS
ultra	328 FPS	364 FPS
4K
low	331 FPS	365 FPS
medium	295 FPS	318 FPS
high	268 FPS	289 FPS
ultra	236 FPS	255 FPS

Open EPYC 9555P Open Ryzen 9 5900X

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	EPYC 9555P	Ryzen 9 5900X
1080p
low	747 FPS	832 FPS
medium	634 FPS	645 FPS
high	590 FPS	558 FPS
ultra	519 FPS	459 FPS
1440p
low	561 FPS	721 FPS
medium	474 FPS	565 FPS
high	434 FPS	488 FPS
ultra	376 FPS	407 FPS
4K
low	405 FPS	511 FPS
medium	326 FPS	421 FPS
high	288 FPS	374 FPS
ultra	229 FPS	308 FPS

Open EPYC 9555P Open Ryzen 9 5900X

League of Legends

League of Legends

Valorant

Preset	EPYC 9555P	Ryzen 9 5900X
1080p
low	1005 FPS	974 FPS
medium	902 FPS	974 FPS
high	778 FPS	934 FPS
ultra	702 FPS	826 FPS
1440p
low	809 FPS	959 FPS
medium	704 FPS	843 FPS
high	603 FPS	726 FPS
ultra	533 FPS	617 FPS
4K
low	574 FPS	694 FPS
medium	510 FPS	621 FPS
high	447 FPS	541 FPS
ultra	392 FPS	437 FPS

Open EPYC 9555P Open Ryzen 9 5900X

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of EPYC 9555P and Ryzen 9 5900X

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.

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 9555P packs 64 cores / 128 threads, while the Ryzen 9 5900X offers 12 cores / 24 threads — the EPYC 9555P has 52 more cores. Boost clocks reach 4.4 GHz on the EPYC 9555P versus 4.8 GHz on the Ryzen 9 5900X — a 8.7% clock advantage for the Ryzen 9 5900X (base: 3.2 GHz vs 3.7 GHz). The EPYC 9555P 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 9555P scores 135,441 against the Ryzen 9 5900X's 38,955 — a 110.7% lead for the EPYC 9555P. Geekbench 6 single-core — the metric most relevant to gaming — records 2,815 vs 2,174, a 25.7% lead for the EPYC 9555P that directly translates to higher frame rates. Multi-core Geekbench: 29,406 vs 11,888 (84.8% advantage for the EPYC 9555P). L3 cache: 256 MB (total) on the EPYC 9555P vs 64 MB on the Ryzen 9 5900X.

Feature	EPYC 9555P	Ryzen 9 5900X
Cores / Threads	64 / 128+433%	12 / 24
Boost Clock	4.4 GHz	4.8 GHz+9%
Base Clock	3.2 GHz	3.7 GHz+16%
L3 Cache	256 MB (total)+300%	64 MB
L2 Cache	1 MB (per core)+100%	512K (per core)
Process	4 nm-43%	7 nm, 12 nm
Architecture	Turin (2024)	Vermeer (Zen3) (2020−2022)
PassMark	135,441+248%	38,955
Cinebench R23 Multi	—	21,000
Geekbench 6 Single	2,815+29%	2,174
Geekbench 6 Multi	29,406+147%	11,888

🧠

Memory & Platform

The EPYC 9555P 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 9555P versus DDR4-3200 on the Ryzen 9 5900X — the EPYC 9555P supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Ryzen 9 5900X supports up to 128 GB of RAM compared to 6 TB — 182.1% more capacity for professional workloads. Memory channels: 12 (EPYC 9555P) vs 2 (Ryzen 9 5900X). PCIe lanes: 128 (EPYC 9555P) vs 24 (Ryzen 9 5900X) — the EPYC 9555P offers 104 more lanes for additional GPUs or NVMe drives. Chipset compatibility: SP5 (EPYC 9555P) and A320,B350,X370,B450,X470,B550,X570 (Ryzen 9 5900X).

Feature	EPYC 9555P	Ryzen 9 5900X
Socket	SP5	AM4
PCIe Generation	PCIe 5.0+25%	PCIe 4.0
Max RAM Speed	DDR5-6000+25%	DDR4-3200
Max RAM Capacity	6 TB+4700%	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 9555P) vs AMD-V (Ryzen 9 5900X). Primary use case: EPYC 9555P targets Data Center / Single Socket, Ryzen 9 5900X targets Workstation. Direct competitor: EPYC 9555P rivals Xeon 6979P; Ryzen 9 5900X rivals Core i9-12900K.

Feature	EPYC 9555P	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

The EPYC 9555P launched at $7983 MSRP, while the Ryzen 9 5900X debuted at $549. On MSRP ($7983 vs $549), the Ryzen 9 5900X is $7434 cheaper. In terms of value on MSRP (PassMark points per dollar), the EPYC 9555P delivers 17.0 pts/$ vs 71.0 pts/$ for the Ryzen 9 5900X — making the Ryzen 9 5900X the 122.8% better value option.