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 $349 less on MSRP ($160 MSRP vs $509 MSRP).
✅Delivers 86.4% more PassMark for each dollar spent, at 81.4 vs 43.7 PassMark/$ ($160 MSRP vs $509 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.
✅Includes a boxed cooler (Yes), unlike Core i9-10900KF.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-10900KF across 7 shared CPU benchmark tests.
❌Lower Geekbench multi-core (5,783 vs 9,261).
❌Smaller total L3 cache (12 MB vs 20 MB).

Core i9-10900KF

2020

Why buy it

✅Better for gaming: +61.6% higher average FPS across 7 shared CPU benchmark tests.
✅+66.7% larger total L3 cache (20 MB vs 12 MB).

Trade-offs

❌Lower PassMark per dollar, at 43.7 vs 81.4 PassMark/$ ($509 MSRP vs $160 MSRP).
❌92.3% higher power demand at 125W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Core i5-10400F

2020

Core i9-10900KF

2020

Why buy it

✅Costs $349 less on MSRP ($160 MSRP vs $509 MSRP).
✅Delivers 86.4% more PassMark for each dollar spent, at 81.4 vs 43.7 PassMark/$ ($160 MSRP vs $509 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.
✅Includes a boxed cooler (Yes), unlike Core i9-10900KF.

Why buy it

✅Better for gaming: +61.6% higher average FPS across 7 shared CPU benchmark tests.
✅+66.7% larger total L3 cache (20 MB vs 12 MB).

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-10900KF across 7 shared CPU benchmark tests.
❌Lower Geekbench multi-core (5,783 vs 9,261).
❌Smaller total L3 cache (12 MB vs 20 MB).

Trade-offs

❌Lower PassMark per dollar, at 43.7 vs 81.4 PassMark/$ ($509 MSRP vs $160 MSRP).
❌92.3% higher power demand at 125W vs 65W.
❌No boxed cooler included, unlike Core i5-10400F.

Quick Answers

So, is Core i9-10900KF better than Core i5-10400F?

Yes. Core i9-10900KF is the better overall CPU here. You are getting a 61.6% average FPS lead across 7 shared CPU game tests in our data, 60.1% better Geekbench multi-core, 70.6% higher 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 i9-10900KF is the better pick here. According to our tests, it delivers 61.6% more average FPS across 7 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i9-10900KF is the better fit. You are getting 60.1% better Geekbench multi-core, backed by 10 cores and 20 threads. It also carries the larger cache pool with 66.7% larger total L3 cache (20 MB vs 12 MB).

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

Core i9-10900KF is still the faster CPU overall, but Core i5-10400F makes more sense if price matters more than absolute performance. Core i9-10900KF is 218.1% more expensive on MSRP at $509 MSRP versus $160 MSRP, and it gives you a 61.6% average FPS lead across 7 shared CPU game tests in our data. Core i5-10400F is also 86.4% better value on MSRP (81.4 vs 43.7 PassMark/$), 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 i9-10900KF is the more future-proof choice for 2026 and beyond. You are getting 66.7% larger total L3 cache (20 MB vs 12 MB) and more multi-core headroom with 10 cores / 20 threads instead of 6/12. That extra compute headroom should age better as games, background tasks, and creator workloads get heavier.

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 i9-10900KF Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Core i9-10900KF
1080p
low	192 FPS	280 FPS
medium	152 FPS	247 FPS
high	123 FPS	207 FPS
ultra	100 FPS	178 FPS
1440p
low	153 FPS	241 FPS
medium	119 FPS	190 FPS
high	97 FPS	156 FPS
ultra	79 FPS	137 FPS
4K
low	82 FPS	167 FPS
medium	70 FPS	133 FPS
high	55 FPS	103 FPS
ultra	43 FPS	89 FPS

Open Core i5-10400F Open Core i9-10900KF

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Core i9-10900KF
1080p
low	326 FPS	556 FPS
medium	318 FPS	523 FPS
high	290 FPS	429 FPS
ultra	253 FPS	386 FPS
1440p
low	326 FPS	556 FPS
medium	292 FPS	475 FPS
high	267 FPS	391 FPS
ultra	234 FPS	335 FPS
4K
low	309 FPS	338 FPS
medium	258 FPS	285 FPS
high	235 FPS	265 FPS
ultra	199 FPS	229 FPS

Open Core i5-10400F Open Core i9-10900KF

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Core i9-10900KF
1080p
low	326 FPS	556 FPS
medium	326 FPS	556 FPS
high	326 FPS	556 FPS
ultra	326 FPS	556 FPS
1440p
low	326 FPS	556 FPS
medium	326 FPS	556 FPS
high	326 FPS	556 FPS
ultra	326 FPS	492 FPS
4K
low	326 FPS	556 FPS
medium	326 FPS	496 FPS
high	289 FPS	445 FPS
ultra	229 FPS	374 FPS

Open Core i5-10400F Open Core i9-10900KF

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Core i9-10900KF
1080p
low	326 FPS	556 FPS
medium	326 FPS	556 FPS
high	326 FPS	556 FPS
ultra	326 FPS	556 FPS
1440p
low	326 FPS	556 FPS
medium	326 FPS	556 FPS
high	326 FPS	556 FPS
ultra	326 FPS	556 FPS
4K
low	326 FPS	556 FPS
medium	326 FPS	556 FPS
high	326 FPS	510 FPS
ultra	326 FPS	437 FPS

Open Core i5-10400F Open Core i9-10900KF

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Core i9-10900KF

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 i9-10900KF

The Core i9-10900KF 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 10 cores and 20 threads. Base frequency is 3.7 GHz, with boost up to 5.2 GHz. L3 cache: 20 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 125 Watt. Memory support: DDR4-2933. Passmark benchmark score: 22,231 points. Launch price was $509.

⚡

Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Core i9-10900KF offers 10 cores / 20 threads — the Core i9-10900KF has 4 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 5.2 GHz on the Core i9-10900KF — a 18.9% clock advantage for the Core i9-10900KF (base: 2.9 GHz vs 3.7 GHz). Both are built on the Comet Lake (2020−2025) architecture using a 14 nm process. In PassMark, the Core i5-10400F scores 13,029 against the Core i9-10900KF's 22,231 — a 52.2% lead for the Core i9-10900KF. Geekbench 6 single-core — the metric most relevant to gaming — records 1,454 vs 1,767, a 19.4% lead for the Core i9-10900KF that directly translates to higher frame rates. Multi-core Geekbench: 5,783 vs 9,261 (46.2% advantage for the Core i9-10900KF). L3 cache: 12 MB (total) on the Core i5-10400F vs 20 MB (total) on the Core i9-10900KF.

Feature	Core i5-10400F	Core i9-10900KF
Cores / Threads	6 / 12	10 / 20+67%
Boost Clock	4.3 GHz	5.2 GHz+21%
Base Clock	2.9 GHz	3.7 GHz+28%
L3 Cache	12 MB (total)	20 MB (total)+67%
L2 Cache	256K (per core)	256 kB (per core)
Process	14 nm	14 nm
Architecture	Comet Lake (2020−2025)	Comet Lake (2020−2025)
PassMark	13,029	22,231+71%
Cinebench R23 Multi	8,191	—
Geekbench 6 Single	1,454	1,767+22%
Geekbench 6 Multi	5,783	9,261+60%

🧠

Memory & Platform

Both processors use the LGA1200 socket with PCIe 3.0. Both support up to DDR4-2666 memory speed. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 16 PCIe lanes. Chipset compatibility: H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F) and LGA1200 (Core i9-10900KF).

Feature	Core i5-10400F	Core i9-10900KF
Socket	LGA1200	LGA1200
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR4-2666	DDR4-2933
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	16

🔧

Advanced Features

Only the Core i9-10900KF has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Both support VT-x, VT-d virtualization. Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.

Feature	Core i5-10400F	Core i9-10900KF
Integrated GPU	No	No
Unlocked	No	Yes
AVX-512	No	No
Virtualization	VT-x, VT-d	VT-x, VT-d
Target Use	Gaming	—

💰

Value Analysis

The Core i5-10400F launched at $160 MSRP, while the Core i9-10900KF debuted at $509. On MSRP ($160 vs $509), the Core i5-10400F is $349 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-10400F delivers 81.4 pts/$ vs 43.7 pts/$ for the Core i9-10900KF — making the Core i5-10400F the 60.4% better value option.