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.

Xeon 6521P vs Xeon Gold 6438Y+ 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.

Xeon 6521P vs Xeon Gold 6438Y+: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Xeon 6521P

2025

Why buy it

✅Massive L3 cache advantage with 144 MB vs 60 MB, which is a real win in CPU-limited gaming.
✅Costs $1,357 less on MSRP ($1,250 MSRP vs $2,607 MSRP).
✅Delivers 115.6% more PassMark for each dollar spent, at 51.8 vs 24.0 PassMark/$ ($1,250 MSRP vs $2,607 MSRP).
✅70% more PCIe lanes (136 vs 80) for storage and expansion-heavy builds.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Xeon Gold 6438Y+

2023

Why buy it

✅Draws 205W instead of 225W, a 20W reduction.

Trade-offs

❌No 3D V-Cache or similar L3 advantage, which matters in CPU-limited gaming (60 MB vs 144 MB).
❌Lower PassMark (62,660 vs 64,761).
❌Lower PassMark per dollar, at 24.0 vs 51.8 PassMark/$ ($2,607 MSRP vs $1,250 MSRP).

Quick Answers

So, is Xeon 6521P better than Xeon Gold 6438Y+?

Yes. Xeon 6521P is the better all-around CPU here. It gives you a 0.7% average FPS lead across 50 shared CPU game tests in our data, 3.4% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Xeon 6521P is the better pick. According to our tests, it delivers 0.7% more average FPS across 50 shared CPU game tests. It also has a clear cache advantage at 144 MB versus 60 MB.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Xeon 6521P is the stronger fit. You are getting 3.4% better PassMark, backed by 24 cores and 48 threads. It also has the larger cache pool with 140% larger total L3 cache (144 MB vs 60 MB).

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

Xeon 6521P is the better buy right now. Xeon 6521P comes in $1,357 cheaper on MSRP at $1,250 MSRP versus $2,607 MSRP, and it still gives you a 0.7% average FPS lead across 50 shared CPU game tests in our data. It is also 115.6% better value on MSRP (51.8 vs 24.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Xeon 6521P makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2023), 3D V-Cache and a much larger 144 MB L3 cache instead of 60 MB, and more multi-core headroom with 24 cores / 48 threads instead of 32/64. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Xeon 6521P vs Xeon Gold 6438Y+ Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

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.

Xeon Gold 6438Y+

The Xeon Gold 6438Y+ is manufactured by Intel. It was released in 10 January 2023 (2 years ago). It is based on the Sapphire Rapids (2023−2024) architecture. It features 32 cores and 64 threads. Base frequency is 2 GHz, with boost up to 4 GHz. L3 cache: 60 MB. L2 cache: 2 MB (per core). Built on 10 nm process technology. Socket: LGA4677. Thermal design power (TDP): 205 Watt. Memory support: DDR5-4800. Passmark benchmark score: 62,660 points. Launch price was $3,141.

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Processing Power

The Xeon 6521P packs 24 cores / 48 threads, while the Xeon Gold 6438Y+ offers 32 cores / 64 threads — the Xeon Gold 6438Y+ has 8 more cores. Boost clocks reach 4.1 GHz on the Xeon 6521P versus 4 GHz on the Xeon Gold 6438Y+ — a 2.5% clock advantage for the Xeon 6521P (base: 2.6 GHz vs 2 GHz). The Xeon 6521P uses the Granite Rapids (2024−2025) architecture (Intel 3 nm), while the Xeon Gold 6438Y+ uses Sapphire Rapids (2023−2024) (10 nm). In PassMark, the Xeon 6521P scores 64,761 against the Xeon Gold 6438Y+'s 62,660 — a 3.3% lead for the Xeon 6521P. L3 cache: 144 MB (total) on the Xeon 6521P vs 60 MB on the Xeon Gold 6438Y+.

Feature	Xeon 6521P	Xeon Gold 6438Y+
Cores / Threads	24 / 48	32 / 64+33%
Boost Clock	4.1 GHz+2%	4 GHz
Base Clock	2.6 GHz+30%	2 GHz
L3 Cache	144 MB (total)+140%	60 MB
L2 Cache	2 MB (per core)	2 MB (per core)
Process	Intel 3 nm-70%	10 nm
Architecture	Granite Rapids (2024−2025)	Sapphire Rapids (2023−2024)
PassMark	64,761+3%	62,660

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Memory & Platform

The Xeon 6521P uses the LGA4710 socket (PCIe 5.0), while the Xeon Gold 6438Y+ uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 6400 on the Xeon 6521P versus 4800 on the Xeon Gold 6438Y+ — the Xeon 6521P supports 33.3% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 4096 of RAM. Both feature 8-channel memory with ECC support. PCIe lanes: 136 (Xeon 6521P) vs 80 (Xeon Gold 6438Y+) — the Xeon 6521P offers 56 more lanes for additional GPUs or NVMe drives. Chipset compatibility: C741 (Xeon 6521P) and C741 (Xeon Gold 6438Y+).

Feature	Xeon 6521P	Xeon Gold 6438Y+
Socket	LGA4710	LGA4677
PCIe Generation	PCIe 5.0	PCIe 5.0
Max RAM Speed	6400+33%	4800
Max RAM Capacity	4096	4096
RAM Channels	8	8
ECC Support	Yes	Yes
PCIe Lanes	136+70%	80

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Advanced Features

Neither processor supports overclocking. Both support AVX-512 instructions, benefiting scientific computing, AI inference, and encryption workloads. Both support VT-x, VT-d virtualization. Direct competitor: Xeon 6521P rivals EPYC 9354; Xeon Gold 6438Y+ rivals EPYC 9354.

Feature	Xeon 6521P	Xeon Gold 6438Y+
Integrated GPU	No	No
IGPU Model	None	None
Unlocked	No	No
AVX-512	Yes	Yes
Virtualization	VT-x, VT-d	VT-x, VT-d

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Value Analysis

At launch, the Xeon 6521P was priced at $1250, while the Xeon Gold 6438Y+ came in at $2607. On launch pricing ($1250 vs $2607), Xeon 6521P was $1357 cheaper. In terms of value on MSRP (PassMark points per dollar), the Xeon 6521P delivers 51.8 pts/$ vs 24.0 pts/$ for the Xeon Gold 6438Y+ — making the Xeon 6521P the 73.2% better value option.

Feature	Xeon 6521P	Xeon Gold 6438Y+
MSRP	$1250-52%	$2607
Performance per Dollar	51.8+116%	24.0
Release Date	2025	2023

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