Core i5-10400F vs Core Ultra 7 255U

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

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Core Ultra 7 255U.

Trade-offs

❌Worse for gaming: lower average FPS than Core Ultra 7 255U across 4 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 17,834).
❌Launch MSRP is still $160 MSRP, while Core Ultra 7 255U mostly shows up through inconsistent older-market listings.
❌364.3% higher power demand at 65W vs 14W.
❌Older platform position on LGA1200 with DDR4, while Core Ultra 7 255U moves to FCBGA2049 and DDR5.

Core Ultra 7 255U

2025

Why buy it

✅Better for gaming: +38.0% higher average FPS across 4 shared CPU benchmark tests.
✅Draws 14W instead of 65W, a 51W reduction.
✅Newer platform on FCBGA2049 with DDR5 support instead of LGA1200 and DDR4.

Trade-offs

❌No boxed cooler included, unlike Core i5-10400F.

Core i5-10400F

2020

Core Ultra 7 255U

2025

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Core Ultra 7 255U.

Why buy it

✅Better for gaming: +38.0% higher average FPS across 4 shared CPU benchmark tests.
✅Draws 14W instead of 65W, a 51W reduction.
✅Newer platform on FCBGA2049 with DDR5 support instead of LGA1200 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Core Ultra 7 255U across 4 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 17,834).
❌Launch MSRP is still $160 MSRP, while Core Ultra 7 255U mostly shows up through inconsistent older-market listings.
❌364.3% higher power demand at 65W vs 14W.
❌Older platform position on LGA1200 with DDR4, while Core Ultra 7 255U moves to FCBGA2049 and DDR5.

Trade-offs

❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Core Ultra 7 255U better than Core i5-10400F?

Yes. Core Ultra 7 255U is the better overall CPU here. You are getting a 38.0% average FPS lead across 4 shared CPU game tests in our data, 36.9% better PassMark, and the stronger long-term platform, which makes it the stronger all-around choice.

Which one is better for gaming?

If gaming is the priority, Core Ultra 7 255U is the better pick here. According to our tests, it delivers 38.0% more average FPS across 4 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core Ultra 7 255U is the better fit. You are getting 36.9% better PassMark, backed by 12 cores and 14 threads.

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

Core Ultra 7 255U is still the faster CPU overall, but Core i5-10400F makes more sense if price matters more than absolute performance. Core Ultra 7 255U is at an unclear MSRP at unclear MSRP versus $160 MSRP, and it gives you a 38.0% average FPS lead across 4 shared CPU game tests in our data. Core i5-10400F is also 100.0% better value on MSRP (81.4 vs 0.0 PassMark/$), which is why it is easier to justify for price-conscious builds on paper.

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

Core Ultra 7 255U is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2025 vs 2020), a healthier platform with FCBGA2049 and DDR5 instead of LGA1200, and more multi-core headroom with 12 cores / 14 threads instead of 6/12. 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

Core Ultra 7 255U Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Core Ultra 7 255U
1080p
low	192 FPS	292 FPS
medium	152 FPS	256 FPS
high	123 FPS	216 FPS
ultra	100 FPS	187 FPS
1440p
low	153 FPS	243 FPS
medium	119 FPS	192 FPS
high	97 FPS	157 FPS
ultra	79 FPS	138 FPS
4K
low	82 FPS	168 FPS
medium	70 FPS	134 FPS
high	55 FPS	104 FPS
ultra	43 FPS	90 FPS

Open Core i5-10400F Open Core Ultra 7 255U

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Core Ultra 7 255U
1080p
low	326 FPS	446 FPS
medium	318 FPS	399 FPS
high	290 FPS	348 FPS
ultra	253 FPS	308 FPS
1440p
low	326 FPS	440 FPS
medium	292 FPS	367 FPS
high	267 FPS	322 FPS
ultra	234 FPS	276 FPS
4K
low	309 FPS	328 FPS
medium	258 FPS	285 FPS
high	235 FPS	265 FPS
ultra	199 FPS	228 FPS

Open Core i5-10400F Open Core Ultra 7 255U

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Core Ultra 7 255U
1080p
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	326 FPS	446 FPS
ultra	326 FPS	446 FPS
1440p
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	326 FPS	446 FPS
ultra	326 FPS	446 FPS
4K
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	289 FPS	446 FPS
ultra	229 FPS	379 FPS

Open Core i5-10400F Open Core Ultra 7 255U

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Core Ultra 7 255U
1080p
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	326 FPS	446 FPS
ultra	326 FPS	446 FPS
1440p
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	326 FPS	446 FPS
ultra	326 FPS	446 FPS
4K
low	326 FPS	446 FPS
medium	326 FPS	446 FPS
high	326 FPS	446 FPS
ultra	326 FPS	427 FPS

Open Core i5-10400F Open Core Ultra 7 255U

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Core Ultra 7 255U

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.

Core Ultra 7 255U

The Core Ultra 7 255U is manufactured by Intel. It was released in 1 January 2025 (less than a year ago). It is based on the Arrow Lake-U (2025) architecture. It features 12 cores and 14 threads. Base frequency is 3.8 GHz, with boost up to 5.2 GHz. L3 cache: 12 MB. Built on 5 nm process technology. Socket: FCBGA2049. Thermal design power (TDP): 14 MB + 12 MB. Memory support: DDR5. Passmark benchmark score: 17,834 points. Launch price was $299.

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Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Core Ultra 7 255U offers 12 cores / 14 threads — the Core Ultra 7 255U has 6 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 5.2 GHz on the Core Ultra 7 255U — a 18.9% clock advantage for the Core Ultra 7 255U (base: 2.9 GHz vs 3.8 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Core Ultra 7 255U uses Arrow Lake-U (2025) (5 nm). In PassMark, the Core i5-10400F scores 13,029 against the Core Ultra 7 255U's 17,834 — a 31.1% lead for the Core Ultra 7 255U. L3 cache: 12 MB (total) on the Core i5-10400F vs 12 MB on the Core Ultra 7 255U.

Feature	Core i5-10400F	Core Ultra 7 255U
Cores / Threads	6 / 12	12 / 14+100%
Boost Clock	4.3 GHz	5.2 GHz+21%
Base Clock	2.9 GHz	3.8 GHz+31%
L3 Cache	12 MB (total)	12 MB
L2 Cache	256K (per core)	—
Process	14 nm	5 nm-64%
Architecture	Comet Lake (2020−2025)	Arrow Lake-U (2025)
PassMark	13,029	17,834+37%
Cinebench R23 Multi	8,191	—
Geekbench 6 Single	1,454	—
Geekbench 6 Multi	5,783	—

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Memory & Platform

The Core i5-10400F uses the LGA1200 socket (PCIe 3.0), while the Core Ultra 7 255U uses FCBGA2049 (PCIe 5.0) — making them incompatible on the same motherboard.

Feature	Core i5-10400F	Core Ultra 7 255U
Socket	LGA1200	FCBGA2049
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	16	—

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Advanced Features

Virtualization: VT-x, VT-d (Core i5-10400F) / not specified (Core Ultra 7 255U). Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.