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: +80.8% higher average FPS across 4 shared CPU benchmark tests.
✅+20% larger total L3 cache (18 MB vs 15 MB).
✅Costs $260 less on MSRP ($174 MSRP vs $434 MSRP).
✅Delivers 354.7% more PassMark for each dollar spent, at 112.3 vs 24.7 PassMark/$ ($174 MSRP vs $434 MSRP).
✅Draws 65W instead of 140W, a 75W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Core i7-6800K

2016

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 4 shared CPU benchmark tests.
❌Lower PassMark (10,715 vs 19,532).
❌Smaller total L3 cache (15 MB vs 18 MB).
❌Lower PassMark per dollar, at 24.7 vs 112.3 PassMark/$ ($434 MSRP vs $174 MSRP).
❌115.4% higher power demand at 140W vs 65W.

Core i5-12400F

2022

Core i7-6800K

2016

Why buy it

✅Better for gaming: +80.8% higher average FPS across 4 shared CPU benchmark tests.
✅+20% larger total L3 cache (18 MB vs 15 MB).
✅Costs $260 less on MSRP ($174 MSRP vs $434 MSRP).
✅Delivers 354.7% more PassMark for each dollar spent, at 112.3 vs 24.7 PassMark/$ ($174 MSRP vs $434 MSRP).
✅Draws 65W instead of 140W, a 75W reduction.

Why buy it

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 4 shared CPU benchmark tests.
❌Lower PassMark (10,715 vs 19,532).
❌Smaller total L3 cache (15 MB vs 18 MB).
❌Lower PassMark per dollar, at 24.7 vs 112.3 PassMark/$ ($434 MSRP vs $174 MSRP).
❌115.4% higher power demand at 140W vs 65W.

Quick Answers

So, is Core i5-12400F better than Core i7-6800K?

Yes. Core i5-12400F is the better overall CPU here. You are getting a 80.8% average FPS lead across 4 shared CPU game tests in our data, 82.3% 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 80.8% 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 82.3% better PassMark, backed by 6 cores and 12 threads. It also carries the larger cache pool with 20% larger total L3 cache (18 MB vs 15 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 $260 cheaper on MSRP at $174 MSRP versus $434 MSRP, and it gives you a 80.8% average FPS lead across 4 shared CPU game tests in our data. It is also 354.7% better value on MSRP (112.3 vs 24.7 PassMark/$), 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 2016), a healthier platform with LGA1700 and DDR5 instead of LGA2011, 20% larger total L3 cache (18 MB vs 15 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 i7-6800K Benchmark Check

Path of Exile 2

Preset	Core i5-12400F	Core i7-6800K
1080p
low	183 FPS	174 FPS
medium	168 FPS	138 FPS
high	139 FPS	112 FPS
ultra	119 FPS	90 FPS
1440p
low	153 FPS	144 FPS
medium	132 FPS	113 FPS
high	106 FPS	91 FPS
ultra	89 FPS	72 FPS
4K
low	87 FPS	66 FPS
medium	81 FPS	55 FPS
high	64 FPS	44 FPS
ultra	49 FPS	35 FPS

Open Core i5-12400F Open Core i7-6800K

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-12400F	Core i7-6800K
1080p
low	471 FPS	242 FPS
medium	397 FPS	207 FPS
high	341 FPS	185 FPS
ultra	301 FPS	146 FPS
1440p
low	407 FPS	215 FPS
medium	351 FPS	186 FPS
high	309 FPS	166 FPS
ultra	265 FPS	135 FPS
4K
low	282 FPS	171 FPS
medium	248 FPS	151 FPS
high	229 FPS	134 FPS
ultra	196 FPS	103 FPS

Open Core i5-12400F Open Core i7-6800K

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-12400F	Core i7-6800K
1080p
low	488 FPS	268 FPS
medium	488 FPS	268 FPS
high	488 FPS	268 FPS
ultra	488 FPS	268 FPS
1440p
low	488 FPS	268 FPS
medium	488 FPS	268 FPS
high	485 FPS	268 FPS
ultra	434 FPS	268 FPS
4K
low	442 FPS	268 FPS
medium	389 FPS	268 FPS
high	337 FPS	268 FPS
ultra	274 FPS	229 FPS

Open Core i5-12400F Open Core i7-6800K

League of Legends

League of Legends

Valorant

Preset	Core i5-12400F	Core i7-6800K
1080p
low	488 FPS	268 FPS
medium	488 FPS	268 FPS
high	488 FPS	268 FPS
ultra	488 FPS	268 FPS
1440p
low	488 FPS	268 FPS
medium	488 FPS	268 FPS
high	488 FPS	268 FPS
ultra	473 FPS	268 FPS
4K
low	488 FPS	268 FPS
medium	450 FPS	268 FPS
high	391 FPS	268 FPS
ultra	330 FPS	268 FPS

Open Core i5-12400F Open Core i7-6800K

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-12400F and Core i7-6800K

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 i7-6800K

The Core i7-6800K is manufactured by Intel. It was released in 31 May 2016 (9 years ago). It is based on the Broadwell-E (2016) architecture. It features 6 cores and 12 threads. Base frequency is 3.4 GHz, with boost up to 3.8 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 10,715 points. Launch price was $345.

⚡

Processing Power

Both the Core i5-12400F and Core i7-6800K share an identical 6-core/12-thread configuration. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 3.8 GHz on the Core i7-6800K — a 14.6% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 3.4 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i7-6800K uses Broadwell-E (2016) (14 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i7-6800K's 10,715 — a 58.3% lead for the Core i5-12400F. L3 cache: 18 MB (total) on the Core i5-12400F vs 15 MB (total) on the Core i7-6800K.

Feature	Core i5-12400F	Core i7-6800K
Cores / Threads	6 / 12	6 / 12
Boost Clock	4.4 GHz+16%	3.8 GHz
Base Clock	2.5 GHz	3.4 GHz+36%
L3 Cache	18 MB (total)+20%	15 MB (total)
L2 Cache	1.25 MB (per core)+400%	256 kB (per core)
Process	Intel 7 nm-50%	14 nm
Architecture	Alder Lake-S (2022)	Broadwell-E (2016)
PassMark	19,532+82%	10,715
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 i7-6800K uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	Core i5-12400F	Core i7-6800K
Socket	LGA1700	LGA2011
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800, DDR4-3200	—
Max RAM Capacity	128 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	20	—

🔧

Advanced Features

Virtualization: VT-x, VT-d, EPT (Core i5-12400F) / not specified (Core i7-6800K). Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Core i5-12400F	Core i7-6800K
Integrated GPU	No	—
Virtualization	VT-x, VT-d, EPT	—
Target Use	Gaming Performance/Value	—

💰

Value Analysis

The Core i5-12400F launched at $174 MSRP, while the Core i7-6800K debuted at $434. On MSRP ($174 vs $434), the Core i5-12400F is $260 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 24.7 pts/$ for the Core i7-6800K — making the Core i5-12400F the 127.9% better value option.