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.

Core i5-10400F

2020

Why buy it

✅Costs $2,208 less on MSRP ($160 MSRP vs $2,368 MSRP).
✅Delivers 228.0% more PassMark for each dollar spent, at 81.4 vs 24.8 PassMark/$ ($160 MSRP vs $2,368 MSRP).
✅Draws 65W instead of 185W, a 120W reduction.
✅Includes a boxed cooler (Yes), unlike Xeon Gold 6421N.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon Gold 6421N across 31 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 58,797).
❌Smaller total L3 cache (12 MB vs 60 MB).
❌Less compelling for workstation-style loads than Xeon Gold 6421N, which brings 32 cores / 64 threads and 80 PCIe lanes.
❌Older platform position on LGA1200 with DDR4, while Xeon Gold 6421N moves to LGA4677 and DDR5.

Xeon Gold 6421N

2023

Why buy it

✅Better for gaming: +26.1% higher average FPS across 31 shared CPU benchmark tests.
✅+400% larger total L3 cache (60 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 32 cores / 64 threads, plus 80 PCIe lanes vs 16.
✅Newer platform on LGA4677 with DDR5 support instead of LGA1200 and DDR4.
✅400% more PCIe lanes (80 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark per dollar, at 24.8 vs 81.4 PassMark/$ ($2,368 MSRP vs $160 MSRP).
❌184.6% higher power demand at 185W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Core i5-10400F

2020

Xeon Gold 6421N

2023

Why buy it

✅Costs $2,208 less on MSRP ($160 MSRP vs $2,368 MSRP).
✅Delivers 228.0% more PassMark for each dollar spent, at 81.4 vs 24.8 PassMark/$ ($160 MSRP vs $2,368 MSRP).
✅Draws 65W instead of 185W, a 120W reduction.
✅Includes a boxed cooler (Yes), unlike Xeon Gold 6421N.

Why buy it

✅Better for gaming: +26.1% higher average FPS across 31 shared CPU benchmark tests.
✅+400% larger total L3 cache (60 MB vs 12 MB).
✅Better for workstations and heavier parallel workloads: 32 cores / 64 threads, plus 80 PCIe lanes vs 16.
✅Newer platform on LGA4677 with DDR5 support instead of LGA1200 and DDR4.
✅400% more PCIe lanes (80 vs 16) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Xeon Gold 6421N across 31 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 58,797).
❌Smaller total L3 cache (12 MB vs 60 MB).
❌Less compelling for workstation-style loads than Xeon Gold 6421N, which brings 32 cores / 64 threads and 80 PCIe lanes.
❌Older platform position on LGA1200 with DDR4, while Xeon Gold 6421N moves to LGA4677 and DDR5.

Trade-offs

❌Lower PassMark per dollar, at 24.8 vs 81.4 PassMark/$ ($2,368 MSRP vs $160 MSRP).
❌184.6% higher power demand at 185W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Xeon Gold 6421N better than Core i5-10400F?

Not in a simple one-size-fits-all way. Xeon Gold 6421N makes more sense for workstation-style multi-core throughput, while Core i5-10400F is the better mainstream desktop choice for gaming, platform cost, and day-to-day practicality.

Which one is better for gaming?

If gaming is the priority, Xeon Gold 6421N is the better pick here. According to our tests, it delivers 26.1% more average FPS across 31 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Xeon Gold 6421N is the better fit. You are getting 351.3% better PassMark, backed by 32 cores and 64 threads. It also carries the larger cache pool with 400% larger total L3 cache (60 MB vs 12 MB).

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

Xeon Gold 6421N is still the faster CPU overall, but Core i5-10400F makes more sense if price matters more than absolute performance. Xeon Gold 6421N is 1380.0% more expensive on MSRP at $2,368 MSRP versus $160 MSRP, and it gives you a 26.1% average FPS lead across 31 shared CPU game tests in our data. Core i5-10400F is also 228.0% better value on MSRP (81.4 vs 24.8 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Xeon Gold 6421N is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2023 vs 2020), a healthier platform with LGA4677 and DDR5 instead of LGA1200, 400% larger total L3 cache (60 MB vs 12 MB), more multi-core headroom with 32 cores / 64 threads instead of 6/12, and AVX-512 support for heavier modern compute workloads. 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.

Core i5-10400F Benchmark Check

Xeon Gold 6421N Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Xeon Gold 6421N
1080p
low	192 FPS	200 FPS
medium	152 FPS	165 FPS
high	123 FPS	137 FPS
ultra	100 FPS	107 FPS
1440p
low	153 FPS	159 FPS
medium	119 FPS	124 FPS
high	97 FPS	98 FPS
ultra	79 FPS	77 FPS
4K
low	82 FPS	73 FPS
medium	70 FPS	61 FPS
high	55 FPS	47 FPS
ultra	43 FPS	39 FPS

Open Core i5-10400F Open Xeon Gold 6421N

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Xeon Gold 6421N
1080p
low	326 FPS	239 FPS
medium	318 FPS	213 FPS
high	290 FPS	177 FPS
ultra	253 FPS	143 FPS
1440p
low	326 FPS	201 FPS
medium	292 FPS	182 FPS
high	267 FPS	157 FPS
ultra	234 FPS	122 FPS
4K
low	309 FPS	125 FPS
medium	258 FPS	116 FPS
high	235 FPS	102 FPS
ultra	199 FPS	83 FPS

Open Core i5-10400F Open Xeon Gold 6421N

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Xeon Gold 6421N
1080p
low	326 FPS	956 FPS
medium	326 FPS	837 FPS
high	326 FPS	793 FPS
ultra	326 FPS	705 FPS
1440p
low	326 FPS	774 FPS
medium	326 FPS	668 FPS
high	326 FPS	623 FPS
ultra	326 FPS	555 FPS
4K
low	326 FPS	495 FPS
medium	326 FPS	391 FPS
high	289 FPS	342 FPS
ultra	229 FPS	279 FPS

Open Core i5-10400F Open Xeon Gold 6421N

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Xeon Gold 6421N
1080p
low	326 FPS	923 FPS
medium	326 FPS	832 FPS
high	326 FPS	717 FPS
ultra	326 FPS	619 FPS
1440p
low	326 FPS	715 FPS
medium	326 FPS	627 FPS
high	326 FPS	538 FPS
ultra	326 FPS	460 FPS
4K
low	326 FPS	516 FPS
medium	326 FPS	460 FPS
high	326 FPS	404 FPS
ultra	326 FPS	349 FPS

Open Core i5-10400F Open Xeon Gold 6421N

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Xeon Gold 6421N

Core i5-10400F

The Core i5-10400F is manufactured by Intel. It was released in 30 April 2020 (5 years ago). It is based on the Comet Lake (2020−2025) architecture. It features 6 cores and 12 threads. Base frequency is 2.9 GHz, with boost up to 4.3 GHz. L3 cache: 12 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 65 Watt. Memory support: DDR4. Passmark benchmark score: 13,029 points. Launch price was $155.

Xeon Gold 6421N

The Xeon Gold 6421N 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 1.8 GHz, with boost up to 3.6 GHz. L3 cache: 60 MB. L2 cache: 2 MB (per core). Built on Intel 7 nm process technology. Socket: LGA4677. Thermal design power (TDP): 185 Watt. Memory support: DDR5-4400. Passmark benchmark score: 58,797 points. Launch price was $2,368.

⚡

Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Xeon Gold 6421N offers 32 cores / 64 threads — the Xeon Gold 6421N has 26 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 3.6 GHz on the Xeon Gold 6421N — a 17.7% clock advantage for the Core i5-10400F (base: 2.9 GHz vs 1.8 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Xeon Gold 6421N uses Sapphire Rapids (2023−2024) (Intel 7 nm). In PassMark, the Core i5-10400F scores 13,029 against the Xeon Gold 6421N's 58,797 — a 127.4% lead for the Xeon Gold 6421N. L3 cache: 12 MB (total) on the Core i5-10400F vs 60 MB on the Xeon Gold 6421N.

Feature	Core i5-10400F	Xeon Gold 6421N
Cores / Threads	6 / 12	32 / 64+433%
Boost Clock	4.3 GHz+19%	3.6 GHz
Base Clock	2.9 GHz+61%	1.8 GHz
L3 Cache	12 MB (total)	60 MB+400%
L2 Cache	256K (per core)	2 MB (per core)+700%
Process	14 nm	Intel 7 nm-50%
Architecture	Comet Lake (2020−2025)	Sapphire Rapids (2023−2024)
PassMark	13,029	58,797+351%
Cinebench R23 Multi	8,191	—
Geekbench 6 Single	1,454	—
Geekbench 6 Multi	5,783	—

🧠

Memory & Platform

The Core i5-10400F uses the LGA1200 socket (PCIe 3.0), while the Xeon Gold 6421N uses LGA4677 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i5-10400F versus 4800 on the Xeon Gold 6421N — the Xeon Gold 6421N supports 199.7% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Xeon Gold 6421N supports up to 4096 of RAM compared to 128 GB — 187.9% more capacity for professional workloads. Memory channels: 2 (Core i5-10400F) vs 8 (Xeon Gold 6421N). PCIe lanes: 16 (Core i5-10400F) vs 80 (Xeon Gold 6421N) — the Xeon Gold 6421N offers 64 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F) and C741 (Xeon Gold 6421N).

Feature	Core i5-10400F	Xeon Gold 6421N
Socket	LGA1200	LGA4677
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666	4800+119900%
Max RAM Capacity	128 GB+3276700%	4096
RAM Channels	2	8+300%
ECC Support	No	Yes
PCIe Lanes	16	80+400%

🔧

Advanced Features

Neither processor supports overclocking. Only the Xeon Gold 6421N supports AVX-512 instructions — important for machine learning and scientific applications. Both support VT-x, VT-d virtualization. Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600; Xeon Gold 6421N rivals EPYC 9354.

Feature	Core i5-10400F	Xeon Gold 6421N
Integrated GPU	No	No
IGPU Model	—	None
Unlocked	No	No
AVX-512	No	Yes
Virtualization	VT-x, VT-d	VT-x, VT-d
Target Use	Gaming	—

💰

Value Analysis

The Core i5-10400F launched at $160 MSRP, while the Xeon Gold 6421N debuted at $2368. On MSRP ($160 vs $2368), the Core i5-10400F is $2208 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-10400F delivers 81.4 pts/$ vs 24.8 pts/$ for the Xeon Gold 6421N — making the Core i5-10400F the 106.5% better value option.