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.

Core i5-12400F vs Core i9-9900K 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.

Core i5-12400F vs Core i9-9900K: Pros, Cons & Final Verdict

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

Core i5-12400F

2022

Why buy it

✅+7.9% higher PassMark.
✅Costs $314 less on MSRP ($174 MSRP vs $488 MSRP).
✅Delivers 202.5% more PassMark for each dollar spent, at 112.3 vs 37.1 PassMark/$ ($174 MSRP vs $488 MSRP).
✅Draws 65W instead of 95W, a 30W reduction.
✅Newer platform on LGA1700 with DDR5 support instead of LGA1151 and DDR4.

Trade-offs

❌Worse for gaming: lower average FPS than Core i9-9900K across 50 shared CPU benchmark tests.
❌No integrated graphics, while Core i9-9900K can still boot and troubleshoot without a discrete GPU.

Core i9-9900K

2018

Why buy it

✅Better for gaming: +18.7% higher average FPS across 50 shared CPU benchmark tests.
✅Integrated graphics onboard with Intel UHD Graphics 630, while Core i5-12400F needs a discrete GPU.

Trade-offs

❌Lower PassMark (18,109 vs 19,532).
❌Lower PassMark per dollar, at 37.1 vs 112.3 PassMark/$ ($488 MSRP vs $174 MSRP).
❌46.2% higher power demand at 95W vs 65W.
❌Older platform position on LGA1151 with DDR4, while Core i5-12400F moves to LGA1700 and DDR5.
❌No boxed cooler included, unlike Core i5-12400F.

Quick Answers

So, is Core i5-12400F better than Core i9-9900K?

It depends on what you want from the system. For gaming, Core i9-9900K is ahead with a 18.7% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core i5-12400F pulls ahead with 7.9% better PassMark.

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

For streaming, content creation, and heavier multitasking, Core i5-12400F is the stronger fit. You are getting 7.9% better PassMark, backed by 6 cores and 12 threads.

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

Core i5-12400F is the better buy right now. Core i5-12400F comes in $314 cheaper on MSRP at $174 MSRP versus $488 MSRP, and it still gives you 7.9% better PassMark. The compromise is that Core i9-9900K is still the better pure gaming CPU with a 18.7% average FPS lead across 50 shared CPU game tests in our data. It is also 202.5% better value on MSRP (112.3 vs 37.1 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Core i5-12400F makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2018), a healthier platform with LGA1700 and DDR5 instead of LGA1151, and more multi-core headroom with 6 cores / 12 threads instead of 8/16. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400F vs Core i9-9900K Technical Specifications

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

Core i5-12400F

The Core i5-12400F is manufactured by Intel. It was released in 4 January 2022 (3 years ago). It is based on the Alder Lake-S (2022) architecture. It features 6 cores and 12 threads. Base frequency is 2.5 GHz, with boost up to 4.4 GHz. L3 cache: 18 MB (total). L2 cache: 1.25 MB (per core). Built on Intel 7 nm process technology. Socket: LGA1700. Thermal design power (TDP): 65 Watt. Memory support: DDR5-4800, DDR4-3200. Passmark benchmark score: 19,532 points. Launch price was $180.

Core i9-9900K

The Core i9-9900K is manufactured by Intel. It was released in 19 October 2018 (7 years ago). It is based on the Coffee Lake-R (2018−2019) architecture. It features 8 cores and 16 threads. Base frequency is 3.6 GHz, with boost up to 5 GHz. L3 cache: 16 MB (total). L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR4. Passmark benchmark score: 18,109 points. Launch price was $488.

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Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Core i9-9900K offers 8 cores / 16 threads — the Core i9-9900K has 2 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 5 GHz on the Core i9-9900K — a 12.8% clock advantage for the Core i9-9900K (base: 2.5 GHz vs 3.6 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i9-9900K uses Coffee Lake-R (2018−2019) (14 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i9-9900K's 18,109 — a 7.6% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 16 MB (total) on the Core i9-9900K.

Feature	Core i5-12400F	Core i9-9900K
Cores / Threads	6 / 12	8 / 16+33%
Boost Clock	4.4 GHz	5 GHz+14%
Base Clock	2.5 GHz	3.6 GHz+44%
L3 Cache	18 MB (total)+13%	16 MB (total)
L2 Cache	1.25 MB (per core)	256K (per core)+20380%
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-S (2022)	Coffee Lake-R (2018−2019)
PassMark	19,532+8%	18,109
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700	—
Geekbench 6 Multi	657	—

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Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i9-9900K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR4-2666 on the Core i9-9900K — the Core i5-12400F supports 80% 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: 20 (Core i5-12400F) vs 16 (Core i9-9900K) — the Core i5-12400F offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and Intel 300 series (Core i9-9900K).

Feature	Core i5-12400F	Core i9-9900K
Socket	LGA1700	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800, DDR4-3200+80%	DDR4-2666
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	20+25%	16

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Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12400F) / not specified (Core i9-9900K). The Core i9-9900K includes integrated graphics (Intel UHD Graphics 630), while the Core i5-12400F requires a dedicated GPU. Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Core i5-12400F	Core i9-9900K
Integrated GPU	No	Yes
IGPU Model	—	Intel UHD Graphics 630
Virtualization	VT-x, VT-d, EPT	—
Target Use	Gaming Performance/Value	—

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Value Analysis

At launch, the Core i5-12400F was priced at $174, while the Core i9-9900K came in at $488. On launch pricing ($174 vs $488), Core i5-12400F was $314 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 37.1 pts/$ for the Core i9-9900K — making the Core i5-12400F the 100.6% better value option.

Feature	Core i5-12400F	Core i9-9900K
MSRP	$174-64%	$488
Performance per Dollar	112.3+203%	37.1
Release Date	2022	2018

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