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 i5-12400F

2022

Why buy it

✅Better for gaming: +32.2% higher average FPS across 4 shared CPU benchmark tests.
✅+50% larger total L3 cache (18 MB vs 12 MB).
✅Costs $185 less on MSRP ($174 MSRP vs $359 MSRP).
✅Delivers 196.9% more PassMark for each dollar spent, at 112.3 vs 37.8 PassMark/$ ($174 MSRP vs $359 MSRP).
✅Draws 65W instead of 95W, a 30W reduction.

Trade-offs

❌No integrated graphics, while Core i7-8700K can still boot and troubleshoot without a discrete GPU.

Core i7-8700K

2017

Why buy it

✅Integrated graphics onboard with Intel UHD Graphics 630, while Core i5-12400F needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 4 shared CPU benchmark tests.
❌Lower PassMark (13,572 vs 19,532).
❌Smaller total L3 cache (12 MB vs 18 MB).
❌Lower PassMark per dollar, at 37.8 vs 112.3 PassMark/$ ($359 MSRP vs $174 MSRP).
❌46.2% higher power demand at 95W vs 65W.

Core i5-12400F

2022

Core i7-8700K

2017

Why buy it

✅Better for gaming: +32.2% higher average FPS across 4 shared CPU benchmark tests.
✅+50% larger total L3 cache (18 MB vs 12 MB).
✅Costs $185 less on MSRP ($174 MSRP vs $359 MSRP).
✅Delivers 196.9% more PassMark for each dollar spent, at 112.3 vs 37.8 PassMark/$ ($174 MSRP vs $359 MSRP).
✅Draws 65W instead of 95W, a 30W reduction.

Why buy it

✅Integrated graphics onboard with Intel UHD Graphics 630, while Core i5-12400F needs a discrete GPU.

Trade-offs

❌No integrated graphics, while Core i7-8700K can still boot and troubleshoot without a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 4 shared CPU benchmark tests.
❌Lower PassMark (13,572 vs 19,532).
❌Smaller total L3 cache (12 MB vs 18 MB).
❌Lower PassMark per dollar, at 37.8 vs 112.3 PassMark/$ ($359 MSRP vs $174 MSRP).
❌46.2% higher power demand at 95W vs 65W.

Quick Answers

So, is Core i5-12400F better than Core i7-8700K?

Yes. Core i5-12400F is the better overall CPU here. You are getting a 32.2% average FPS lead across 4 shared CPU game tests in our data, 43.9% 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 i5-12400F is the better pick here. According to our tests, it delivers 32.2% 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 i5-12400F is the better fit. You are getting 43.9% better PassMark, backed by 6 cores and 12 threads. It also carries the larger cache pool with 50% larger total L3 cache (18 MB vs 12 MB).

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

Core i5-12400F is the smarter buy today. Core i5-12400F is $185 cheaper on MSRP at $174 MSRP versus $359 MSRP, and it gives you a 32.2% average FPS lead across 4 shared CPU game tests in our data. It is also 196.9% better value on MSRP (112.3 vs 37.8 PassMark/$), so the better CPU is not just faster, it is also the cleaner value play on paper.

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

Core i5-12400F is the more future-proof choice for 2026 and beyond. You are getting a newer CPU generation (2022 vs 2017), a healthier platform with LGA1700 and DDR5 instead of LGA1151, 50% larger total L3 cache (18 MB vs 12 MB), and more multi-core headroom with 6 cores / 12 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 i5-12400F Benchmark Check

Core i7-8700K Benchmark Check

Path of Exile 2

Preset	Core i5-12400F	Core i7-8700K
1080p
low	183 FPS	214 FPS
medium	168 FPS	173 FPS
high	139 FPS	140 FPS
ultra	119 FPS	103 FPS
1440p
low	153 FPS	181 FPS
medium	132 FPS	145 FPS
high	106 FPS	116 FPS
ultra	89 FPS	86 FPS
4K
low	87 FPS	92 FPS
medium	81 FPS	79 FPS
high	64 FPS	62 FPS
ultra	49 FPS	48 FPS

Open Core i5-12400F Open Core i7-8700K

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-12400F	Core i7-8700K
1080p
low	471 FPS	339 FPS
medium	397 FPS	339 FPS
high	341 FPS	321 FPS
ultra	301 FPS	275 FPS
1440p
low	407 FPS	339 FPS
medium	351 FPS	326 FPS
high	309 FPS	292 FPS
ultra	265 FPS	250 FPS
4K
low	282 FPS	331 FPS
medium	248 FPS	276 FPS
high	229 FPS	248 FPS
ultra	196 FPS	204 FPS

Open Core i5-12400F Open Core i7-8700K

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-12400F	Core i7-8700K
1080p
low	488 FPS	339 FPS
medium	488 FPS	339 FPS
high	488 FPS	339 FPS
ultra	488 FPS	339 FPS
1440p
low	488 FPS	339 FPS
medium	488 FPS	339 FPS
high	485 FPS	339 FPS
ultra	434 FPS	339 FPS
4K
low	442 FPS	339 FPS
medium	389 FPS	339 FPS
high	337 FPS	339 FPS
ultra	274 FPS	303 FPS

Open Core i5-12400F Open Core i7-8700K

League of Legends

League of Legends

Valorant

Preset	Core i5-12400F	Core i7-8700K
1080p
low	488 FPS	339 FPS
medium	488 FPS	339 FPS
high	488 FPS	339 FPS
ultra	488 FPS	339 FPS
1440p
low	488 FPS	339 FPS
medium	488 FPS	339 FPS
high	488 FPS	339 FPS
ultra	473 FPS	339 FPS
4K
low	488 FPS	339 FPS
medium	450 FPS	339 FPS
high	391 FPS	339 FPS
ultra	330 FPS	339 FPS

Open Core i5-12400F Open Core i7-8700K

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-12400F and Core i7-8700K

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 i7-8700K

The Core i7-8700K is manufactured by Intel. It was released in 5 October 2017 (8 years ago). It is based on the Coffee Lake-S (2017−2018) architecture. It features 6 cores and 12 threads. Base frequency is 3.7 GHz, with boost up to 4.7 GHz. L3 cache: 12288 kB. L2 cache: 256K (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 95 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 13,572 points. Launch price was $359.

⚡

Processing Power

Both the Core i5-12400F and Core i7-8700K share an identical 6-core/12-thread configuration. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 4.7 GHz on the Core i7-8700K — a 6.6% clock advantage for the Core i7-8700K (base: 2.5 GHz vs 3.7 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i7-8700K uses Coffee Lake-S (2017−2018) (14 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i7-8700K's 13,572 — a 36% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 12288 kB on the Core i7-8700K.

Feature	Core i5-12400F	Core i7-8700K
Cores / Threads	6 / 12	6 / 12
Boost Clock	4.4 GHz	4.7 GHz+7%
Base Clock	2.5 GHz	3.7 GHz+48%
L3 Cache	18 MB (total)+50%	12288 kB
L2 Cache	1.25 MB (per core)+400%	256K (per core)
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-S (2022)	Coffee Lake-S (2017−2018)
PassMark	19,532+44%	13,572
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700	—
Geekbench 6 Multi	657	—

🧠

Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i7-8700K 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 i7-8700K — the Core i5-12400F 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: 20 (Core i5-12400F) vs 16 (Core i7-8700K) — 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 i7-8700K).

Feature	Core i5-12400F	Core i7-8700K
Socket	LGA1700	LGA1151
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800, DDR4-3200+25%	DDR4-2666
Max RAM Capacity	128 GB	128 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	20+25%	16

🔧

Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12400F) / not specified (Core i7-8700K). The Core i7-8700K 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 i7-8700K
Integrated GPU	No	Yes
IGPU Model	—	Intel UHD Graphics 630
Virtualization	VT-x, VT-d, EPT	—
Target Use	Gaming Performance/Value	—

💰

Value Analysis

The Core i5-12400F launched at $174 MSRP, while the Core i7-8700K debuted at $359. On MSRP ($174 vs $359), the Core i5-12400F is $185 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 37.8 pts/$ for the Core i7-8700K — making the Core i5-12400F the 99.2% better value option.