Ryzen Threadripper PRO 9955WX vs Xeon 6521P

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.

Ryzen Threadripper PRO 9955WX

2025

Why buy it

✅Better for gaming: +23.7% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $821 less on MSRP ($429 MSRP vs $1,250 MSRP).
✅Delivers 204.0% more PassMark for each dollar spent, at 157.5 vs 51.8 PassMark/$ ($429 MSRP vs $1,250 MSRP).

Trade-offs

❌Smaller total L3 cache (64 MB vs 144 MB).
❌55.6% higher power demand at 350W vs 225W.

Xeon 6521P

2025

Why buy it

✅+125% larger total L3 cache (144 MB vs 64 MB).
✅Draws 225W instead of 350W, a 125W reduction.
✅6.3% more PCIe lanes (136 vs 128) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen Threadripper PRO 9955WX across 50 shared CPU benchmark tests.
❌Lower PassMark (64,761 vs 67,561).
❌Lower PassMark per dollar, at 51.8 vs 157.5 PassMark/$ ($1,250 MSRP vs $429 MSRP).

Ryzen Threadripper PRO 9955WX

2025

Xeon 6521P

2025

Why buy it

✅Better for gaming: +23.7% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $821 less on MSRP ($429 MSRP vs $1,250 MSRP).
✅Delivers 204.0% more PassMark for each dollar spent, at 157.5 vs 51.8 PassMark/$ ($429 MSRP vs $1,250 MSRP).

Why buy it

✅+125% larger total L3 cache (144 MB vs 64 MB).
✅Draws 225W instead of 350W, a 125W reduction.
✅6.3% more PCIe lanes (136 vs 128) for storage and expansion-heavy builds.

Trade-offs

❌Smaller total L3 cache (64 MB vs 144 MB).
❌55.6% higher power demand at 350W vs 225W.

Trade-offs

❌Worse for gaming: lower average FPS than Ryzen Threadripper PRO 9955WX across 50 shared CPU benchmark tests.
❌Lower PassMark (64,761 vs 67,561).
❌Lower PassMark per dollar, at 51.8 vs 157.5 PassMark/$ ($1,250 MSRP vs $429 MSRP).

Quick Answers

So, is Ryzen Threadripper PRO 9955WX better than Xeon 6521P?

Yes. Ryzen Threadripper PRO 9955WX is the better overall CPU here. You are getting a 23.7% average FPS lead across 50 shared CPU game tests in our data and 4.3% better PassMark, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Ryzen Threadripper PRO 9955WX is the better pick here. According to our tests, it delivers 23.7% 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, Ryzen Threadripper PRO 9955WX is the better fit. You are getting 4.3% better PassMark, backed by 16 cores and 32 threads.

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

Ryzen Threadripper PRO 9955WX is the smarter buy today. Ryzen Threadripper PRO 9955WX is $821 cheaper on MSRP at $429 MSRP versus $1,250 MSRP, and it gives you a 23.7% average FPS lead across 50 shared CPU game tests in our data. It is also 204.0% better value on MSRP (157.5 vs 51.8 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Xeon 6521P is the safer long-term CPU choice because it gives you more overall headroom and a better platform outlook.

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.

Ryzen Threadripper PRO 9955WX Benchmark Check

Xeon 6521P Benchmark Check

Path of Exile 2

Preset	Ryzen Threadripper PRO 9955WX	Xeon 6521P
1080p
low	297 FPS	188 FPS
medium	270 FPS	165 FPS
high	223 FPS	131 FPS
ultra	188 FPS	106 FPS
1440p
low	273 FPS	155 FPS
medium	224 FPS	131 FPS
high	174 FPS	100 FPS
ultra	153 FPS	82 FPS
4K
low	187 FPS	70 FPS
medium	154 FPS	63 FPS
high	118 FPS	49 FPS
ultra	104 FPS	40 FPS

Open Ryzen Threadripper PRO 9955WX Open Xeon 6521P

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Ryzen Threadripper PRO 9955WX	Xeon 6521P
1080p
low	786 FPS	585 FPS
medium	643 FPS	517 FPS
high	477 FPS	428 FPS
ultra	403 FPS	376 FPS
1440p
low	647 FPS	489 FPS
medium	549 FPS	437 FPS
high	422 FPS	372 FPS
ultra	328 FPS	309 FPS
4K
low	363 FPS	304 FPS
medium	312 FPS	274 FPS
high	273 FPS	250 FPS
ultra	230 FPS	222 FPS

Open Ryzen Threadripper PRO 9955WX Open Xeon 6521P

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Ryzen Threadripper PRO 9955WX	Xeon 6521P
1080p
low	888 FPS	900 FPS
medium	705 FPS	829 FPS
high	622 FPS	768 FPS
ultra	534 FPS	677 FPS
1440p
low	713 FPS	770 FPS
medium	567 FPS	706 FPS
high	489 FPS	650 FPS
ultra	414 FPS	581 FPS
4K
low	507 FPS	510 FPS
medium	418 FPS	429 FPS
high	375 FPS	383 FPS
ultra	315 FPS	318 FPS

Open Ryzen Threadripper PRO 9955WX Open Xeon 6521P

League of Legends

League of Legends

Valorant

Preset	Ryzen Threadripper PRO 9955WX	Xeon 6521P
1080p
low	1106 FPS	983 FPS
medium	991 FPS	884 FPS
high	867 FPS	764 FPS
ultra	781 FPS	663 FPS
1440p
low	860 FPS	803 FPS
medium	759 FPS	699 FPS
high	664 FPS	601 FPS
ultra	576 FPS	517 FPS
4K
low	632 FPS	579 FPS
medium	562 FPS	520 FPS
high	496 FPS	461 FPS
ultra	429 FPS	396 FPS

Open Ryzen Threadripper PRO 9955WX Open Xeon 6521P

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Ryzen Threadripper PRO 9955WX and Xeon 6521P

Ryzen Threadripper PRO 9955WX

The Ryzen Threadripper PRO 9955WX is manufactured by AMD. It was released in 23 July 2025 (less than a year ago). It is based on the Shimada Peak (2025) architecture. It features 16 cores and 32 threads. Base frequency is 4.5 GHz, with boost up to 5.4 GHz. L3 cache: 64 MB (total). L2 cache: 1 MB (per core). Built on 4 nm process technology. Socket: sTR5. Thermal design power (TDP): 350 Watt. Memory support: DDR5. Passmark benchmark score: 67,561 points. Launch price was $1,649.

Xeon 6521P

The Xeon 6521P is manufactured by Intel. It was released in 24 February 2025 (less than a year ago). It is based on the Granite Rapids (2024−2025) architecture. It features 24 cores and 48 threads. Base frequency is 2.6 GHz, with boost up to 4.1 GHz. L3 cache: 144 MB (total). L2 cache: 2 MB (per core). Built on Intel 3 nm process technology. Socket: LGA4710. Thermal design power (TDP): 225 Watt. Memory support: DDR5(6400MT/s). Passmark benchmark score: 64,761 points. Launch price was $1,250.

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Processing Power

The Ryzen Threadripper PRO 9955WX packs 16 cores / 32 threads, while the Xeon 6521P offers 24 cores / 48 threads — the Xeon 6521P has 8 more cores. Boost clocks reach 5.4 GHz on the Ryzen Threadripper PRO 9955WX versus 4.1 GHz on the Xeon 6521P — a 27.4% clock advantage for the Ryzen Threadripper PRO 9955WX (base: 4.5 GHz vs 2.6 GHz). The Ryzen Threadripper PRO 9955WX uses the Shimada Peak (2025) architecture (4 nm), while the Xeon 6521P uses Granite Rapids (2024−2025) (Intel 3 nm). In PassMark, the Ryzen Threadripper PRO 9955WX scores 67,561 against the Xeon 6521P's 64,761 — a 4.2% lead for the Ryzen Threadripper PRO 9955WX. L3 cache: 64 MB (total) on the Ryzen Threadripper PRO 9955WX vs 144 MB (total) on the Xeon 6521P.

Feature	Ryzen Threadripper PRO 9955WX	Xeon 6521P
Cores / Threads	16 / 32	24 / 48+50%
Boost Clock	5.4 GHz+32%	4.1 GHz
Base Clock	4.5 GHz+73%	2.6 GHz
L3 Cache	64 MB (total)	144 MB (total)+125%
L2 Cache	1 MB (per core)	2 MB (per core)+100%
Process	4 nm	Intel 3 nm-25%
Architecture	Shimada Peak (2025)	Granite Rapids (2024−2025)
PassMark	67,561+4%	64,761
Cinebench R23 Multi	40,000	—
Geekbench 6 Single	3,016	—
Geekbench 6 Multi	23,596	—

🧠

Memory & Platform

The Ryzen Threadripper PRO 9955WX uses the sTR5 socket (PCIe 4.0), while the Xeon 6521P uses LGA4710 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-6400 on the Ryzen Threadripper PRO 9955WX versus 6400 on the Xeon 6521P — the Xeon 6521P supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon 6521P supports up to 4096 of RAM compared to 2048 GB — 66.7% more capacity for professional workloads. Both feature 8-channel memory with ECC support. PCIe lanes: 128 (Ryzen Threadripper PRO 9955WX) vs 136 (Xeon 6521P) — the Xeon 6521P offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: WRX90 (Ryzen Threadripper PRO 9955WX) and C741 (Xeon 6521P).

Feature	Ryzen Threadripper PRO 9955WX	Xeon 6521P
Socket	sTR5	LGA4710
PCIe Generation	PCIe 4.0	PCIe 5.0+25%
Max RAM Speed	DDR5-6400	6400+127900%
Max RAM Capacity	2048 GB+52428700%	4096
RAM Channels	8	8
ECC Support	Yes	Yes
PCIe Lanes	128	136+6%

🔧

Advanced Features

Only the Ryzen Threadripper PRO 9955WX has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Virtualization support: true (Ryzen Threadripper PRO 9955WX) vs VT-x, VT-d (Xeon 6521P). Direct competitor: Ryzen Threadripper PRO 9955WX rivals Xeon w7-3555; Xeon 6521P rivals EPYC 9354.

Feature	Ryzen Threadripper PRO 9955WX	Xeon 6521P
Integrated GPU	No	No
IGPU Model	None	None
Unlocked	Yes	No
AVX-512	Yes	Yes
Virtualization	true	VT-x, VT-d

💰

Value Analysis

The Ryzen Threadripper PRO 9955WX launched at $429 MSRP, while the Xeon 6521P debuted at $1250. On MSRP ($429 vs $1250), the Ryzen Threadripper PRO 9955WX is $821 cheaper. In terms of value on MSRP (PassMark points per dollar), the Ryzen Threadripper PRO 9955WX delivers 157.5 pts/$ vs 51.8 pts/$ for the Xeon 6521P — making the Ryzen Threadripper PRO 9955WX the 101% better value option.