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 $429 less on MSRP ($160 MSRP vs $589 MSRP).
✅Delivers 16.5% more PassMark for each dollar spent, at 81.4 vs 69.9 PassMark/$ ($160 MSRP vs $589 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.
✅Includes a boxed cooler (Yes), unlike Core i9-12900K.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-12900K across 3 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 41,180).
❌Smaller total L3 cache (12 MB vs 30 MB).
❌Older platform position on LGA1200 with DDR4, while Core i9-12900K moves to LGA1700 and DDR5.
❌No integrated graphics, while Core i9-12900K can still boot and troubleshoot without a discrete GPU.

Core i9-12900K

2021

Why buy it

✅Better for gaming: +65.0% higher average FPS across 3 shared CPU benchmark tests.
✅+150% larger total L3 cache (30 MB vs 12 MB).
✅Newer platform on LGA1700 with DDR5 support instead of LGA1200 and DDR4.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel UHD Graphics 770, while Core i5-10400F needs a discrete GPU.

Trade-offs

❌Lower PassMark per dollar, at 69.9 vs 81.4 PassMark/$ ($589 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 i9-12900K

2021

Why buy it

✅Costs $429 less on MSRP ($160 MSRP vs $589 MSRP).
✅Delivers 16.5% more PassMark for each dollar spent, at 81.4 vs 69.9 PassMark/$ ($160 MSRP vs $589 MSRP).
✅Draws 65W instead of 125W, a 60W reduction.
✅Includes a boxed cooler (Yes), unlike Core i9-12900K.

Why buy it

✅Better for gaming: +65.0% higher average FPS across 3 shared CPU benchmark tests.
✅+150% larger total L3 cache (30 MB vs 12 MB).
✅Newer platform on LGA1700 with DDR5 support instead of LGA1200 and DDR4.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Intel UHD Graphics 770, while Core i5-10400F needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-12900K across 3 shared CPU benchmark tests.
❌Lower PassMark (13,029 vs 41,180).
❌Smaller total L3 cache (12 MB vs 30 MB).
❌Older platform position on LGA1200 with DDR4, while Core i9-12900K moves to LGA1700 and DDR5.
❌No integrated graphics, while Core i9-12900K can still boot and troubleshoot without a discrete GPU.

Trade-offs

❌Lower PassMark per dollar, at 69.9 vs 81.4 PassMark/$ ($589 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 i9-12900K better than Core i5-10400F?

Yes. Core i9-12900K is the better overall CPU here. You are getting a 65.0% average FPS lead across 3 shared CPU game tests in our data, 216.1% 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 i9-12900K is the better pick here. According to our tests, it delivers 65.0% more average FPS across 3 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core i9-12900K is the better fit. You are getting 216.1% better PassMark, backed by 16 cores and 24 threads. It also carries the larger cache pool with 150% larger total L3 cache (30 MB vs 12 MB).

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

Core i9-12900K is still the faster CPU overall, but Core i5-10400F makes more sense if price matters more than absolute performance. Core i9-12900K is 268.1% more expensive on MSRP at $589 MSRP versus $160 MSRP, and it gives you a 65.0% average FPS lead across 3 shared CPU game tests in our data. Core i5-10400F is also 16.5% better value on MSRP (81.4 vs 69.9 PassMark/$), which is why it is easier to justify for price-conscious builds on paper. That said, if you already own a compatible LGA1200 + DDR4 setup, Core i5-10400F can still make sense as a platform-matched option because it avoids a motherboard and RAM swap.

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

Core i9-12900K is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2021 vs 2020), a healthier platform with LGA1700 and DDR5 instead of LGA1200, 150% larger total L3 cache (30 MB vs 12 MB), and more multi-core headroom with 16 cores / 24 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 i9-12900K Benchmark Check

Path of Exile 2

Preset	Core i5-10400F	Core i9-12900K
1080p
low	192 FPS	272 FPS
medium	152 FPS	261 FPS
high	123 FPS	215 FPS
ultra	100 FPS	185 FPS
1440p
low	153 FPS	233 FPS
medium	119 FPS	199 FPS
high	97 FPS	159 FPS
ultra	79 FPS	140 FPS
4K
low	82 FPS	160 FPS
medium	70 FPS	137 FPS
high	55 FPS	106 FPS
ultra	43 FPS	94 FPS

Open Core i5-10400F Open Core i9-12900K

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-10400F	Core i9-12900K
1080p
low	326 FPS	636 FPS
medium	318 FPS	540 FPS
high	290 FPS	452 FPS
ultra	253 FPS	414 FPS
1440p
low	326 FPS	545 FPS
medium	292 FPS	482 FPS
high	267 FPS	407 FPS
ultra	234 FPS	353 FPS
4K
low	309 FPS	321 FPS
medium	258 FPS	290 FPS
high	235 FPS	275 FPS
ultra	199 FPS	244 FPS

Open Core i5-10400F Open Core i9-12900K

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-10400F	Core i9-12900K
1080p
low	326 FPS	776 FPS
medium	326 FPS	620 FPS
high	326 FPS	541 FPS
ultra	326 FPS	460 FPS
1440p
low	326 FPS	692 FPS
medium	326 FPS	560 FPS
high	326 FPS	484 FPS
ultra	326 FPS	414 FPS
4K
low	326 FPS	499 FPS
medium	326 FPS	418 FPS
high	289 FPS	379 FPS
ultra	229 FPS	320 FPS

Open Core i5-10400F Open Core i9-12900K

League of Legends

League of Legends

Valorant

Preset	Core i5-10400F	Core i9-12900K
1080p
low	326 FPS	900 FPS
medium	326 FPS	817 FPS
high	326 FPS	706 FPS
ultra	326 FPS	637 FPS
1440p
low	326 FPS	778 FPS
medium	326 FPS	693 FPS
high	326 FPS	598 FPS
ultra	326 FPS	529 FPS
4K
low	326 FPS	534 FPS
medium	326 FPS	483 FPS
high	326 FPS	432 FPS
ultra	326 FPS	378 FPS

Open Core i5-10400F Open Core i9-12900K

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-10400F and Core i9-12900K

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 i9-12900K

The Core i9-12900K is manufactured by Intel. It was released in 4 November 2021 (4 years ago). It is based on the Alder Lake, Golden Cove, Gracemont (2021) architecture. It features 16 cores and 24 threads. Base frequency is 3.2 GHz, with boost up to 5.2 GHz. L3 cache: 30 MB (total). L2 cache: 1.25 MB (per core). Built on 10 nm process technology. Socket: LGA1700. Thermal design power (TDP): 125 Watt. Memory support: DDR4, DDR5. Passmark benchmark score: 41,180 points. Launch price was $589.

⚡

Processing Power

The Core i5-10400F packs 6 cores / 12 threads, while the Core i9-12900K offers 16 cores / 24 threads — the Core i9-12900K has 10 more cores. Boost clocks reach 4.3 GHz on the Core i5-10400F versus 5.2 GHz on the Core i9-12900K — a 18.9% clock advantage for the Core i9-12900K (base: 2.9 GHz vs 3.2 GHz). The Core i5-10400F uses the Comet Lake (2020−2025) architecture (14 nm), while the Core i9-12900K uses Alder Lake, Golden Cove, Gracemont (2021) (10 nm). In PassMark, the Core i5-10400F scores 13,029 against the Core i9-12900K's 41,180 — a 103.9% lead for the Core i9-12900K. L3 cache: 12 MB (total) on the Core i5-10400F vs 30 MB (total) on the Core i9-12900K.

Feature	Core i5-10400F	Core i9-12900K
Cores / Threads	6 / 12	16 / 24+167%
Boost Clock	4.3 GHz	5.2 GHz+21%
Base Clock	2.9 GHz	3.2 GHz+10%
L3 Cache	12 MB (total)	30 MB (total)+150%
L2 Cache	256K (per core)	1.25 MB (per core)+400%
Process	14 nm	10 nm-29%
Architecture	Comet Lake (2020−2025)	Alder Lake, Golden Cove, Gracemont (2021)
PassMark	13,029	41,180+216%
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 Core i9-12900K uses LGA1700 (PCIe 5.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR4-2666 on the Core i5-10400F versus DDR5-4800 on the Core i9-12900K — the Core i9-12900K supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 128 GB of RAM. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i5-10400F) vs 20 (Core i9-12900K) — the Core i9-12900K offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400F) and Intel 600 series,Intel 700 series (Core i9-12900K).

Feature	Core i5-10400F	Core i9-12900K
Socket	LGA1200	LGA1700
PCIe Generation	PCIe 3.0	PCIe 5.0+67%
Max RAM Speed	DDR4-2666	DDR5-4800+25%
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	Yes
PCIe Lanes	16	20+25%

🔧

Advanced Features

Virtualization: VT-x, VT-d (Core i5-10400F) / not specified (Core i9-12900K). The Core i9-12900K includes integrated graphics (Intel UHD Graphics 770), while the Core i5-10400F requires a dedicated GPU. Primary use case: Core i5-10400F targets Gaming. Direct competitor: Core i5-10400F rivals Ryzen 5 3600.

Feature	Core i5-10400F	Core i9-12900K
Integrated GPU	No	Yes
IGPU Model	—	Intel UHD Graphics 770
Unlocked	No	—
AVX-512	No	—
Virtualization	VT-x, VT-d	—
Target Use	Gaming	—

💰

Value Analysis

The Core i5-10400F launched at $160 MSRP, while the Core i9-12900K debuted at $589. On MSRP ($160 vs $589), the Core i5-10400F is $429 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-10400F delivers 81.4 pts/$ vs 69.9 pts/$ for the Core i9-12900K — making the Core i5-10400F the 15.2% better value option.