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: +112.1% higher average FPS across 2 shared CPU benchmark tests.
✅+20% larger total L3 cache (18 MB vs 15 MB).
✅Costs $215 less on MSRP ($174 MSRP vs $389 MSRP).
✅Delivers 344.4% more PassMark for each dollar spent, at 112.3 vs 25.3 PassMark/$ ($174 MSRP vs $389 MSRP).
✅Draws 65W instead of 140W, a 75W reduction.

Trade-offs

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

Core i7-5820K

2014

Why buy it

✅40% more PCIe lanes (28 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 2 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (5,700 vs 12,380).
❌Smaller total L3 cache (15 MB vs 18 MB).
❌Lower PassMark per dollar, at 25.3 vs 112.3 PassMark/$ ($389 MSRP vs $174 MSRP).
❌115.4% higher power demand at 140W vs 65W.

Core i5-12400F

2022

Core i7-5820K

2014

Why buy it

✅Better for gaming: +112.1% higher average FPS across 2 shared CPU benchmark tests.
✅+20% larger total L3 cache (18 MB vs 15 MB).
✅Costs $215 less on MSRP ($174 MSRP vs $389 MSRP).
✅Delivers 344.4% more PassMark for each dollar spent, at 112.3 vs 25.3 PassMark/$ ($174 MSRP vs $389 MSRP).
✅Draws 65W instead of 140W, a 75W reduction.

Why buy it

✅40% more PCIe lanes (28 vs 20) for storage and expansion-heavy builds.

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 2 shared CPU benchmark tests.
❌Lower Cinebench R23 multi-core (5,700 vs 12,380).
❌Smaller total L3 cache (15 MB vs 18 MB).
❌Lower PassMark per dollar, at 25.3 vs 112.3 PassMark/$ ($389 MSRP vs $174 MSRP).
❌115.4% higher power demand at 140W vs 65W.

Quick Answers

So, is Core i5-12400F better than Core i7-5820K?

Yes. Core i5-12400F is the better overall CPU here. You are getting a 112.1% average FPS lead across 2 shared CPU game tests in our data, 117.2% better Cinebench R23 multi-core, 98.8% 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 i5-12400F is the better pick here. According to our tests, it delivers 112.1% more average FPS across 2 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 117.2% better Cinebench R23 multi-core, 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 $215 cheaper on MSRP at $174 MSRP versus $389 MSRP, and it gives you a 112.1% average FPS lead across 2 shared CPU game tests in our data. It is also 344.4% better value on MSRP (112.3 vs 25.3 PassMark/$), 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 2014), 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 i7-5820K Benchmark Check

Path of Exile 2

Preset	Core i5-12400F	Core i7-5820K
1080p
low	183 FPS	163 FPS
medium	168 FPS	140 FPS
high	139 FPS	113 FPS
ultra	119 FPS	93 FPS
1440p
low	153 FPS	137 FPS
medium	132 FPS	116 FPS
high	106 FPS	92 FPS
ultra	89 FPS	75 FPS
4K
low	87 FPS	63 FPS
medium	81 FPS	56 FPS
high	64 FPS	44 FPS
ultra	49 FPS	35 FPS

Open Core i5-12400F Open Core i7-5820K

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Core i5-12400F	Core i7-5820K
1080p
low	471 FPS	201 FPS
medium	397 FPS	176 FPS
high	341 FPS	162 FPS
ultra	301 FPS	126 FPS
1440p
low	407 FPS	177 FPS
medium	351 FPS	155 FPS
high	309 FPS	143 FPS
ultra	265 FPS	114 FPS
4K
low	282 FPS	139 FPS
medium	248 FPS	123 FPS
high	229 FPS	105 FPS
ultra	196 FPS	75 FPS

Open Core i5-12400F Open Core i7-5820K

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Core i5-12400F	Core i7-5820K
1080p
low	488 FPS	246 FPS
medium	488 FPS	246 FPS
high	488 FPS	246 FPS
ultra	488 FPS	246 FPS
1440p
low	488 FPS	246 FPS
medium	488 FPS	246 FPS
high	485 FPS	246 FPS
ultra	434 FPS	246 FPS
4K
low	442 FPS	246 FPS
medium	389 FPS	246 FPS
high	337 FPS	246 FPS
ultra	274 FPS	238 FPS

Open Core i5-12400F Open Core i7-5820K

League of Legends

League of Legends

Valorant

Preset	Core i5-12400F	Core i7-5820K
1080p
low	488 FPS	246 FPS
medium	488 FPS	246 FPS
high	488 FPS	246 FPS
ultra	488 FPS	246 FPS
1440p
low	488 FPS	246 FPS
medium	488 FPS	246 FPS
high	488 FPS	246 FPS
ultra	473 FPS	246 FPS
4K
low	488 FPS	246 FPS
medium	450 FPS	246 FPS
high	391 FPS	246 FPS
ultra	330 FPS	246 FPS

Open Core i5-12400F Open Core i7-5820K

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Core i5-12400F and Core i7-5820K

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 i7-5820K

The Core i7-5820K is manufactured by Intel. It was released in 1 September 2014 (11 years ago). It is based on the Haswell-E (2014) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.6 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 9,826 points. Launch price was $410.

⚡

Processing Power

Both the Core i5-12400F and Core i7-5820K share an identical 6-core/12-thread configuration. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 3.6 GHz on the Core i7-5820K — a 20% clock advantage for the Core i5-12400F (base: 2.5 GHz vs 3.3 GHz). The Core i5-12400F uses the Alder Lake-S (2022) architecture (Intel 7 nm), while the Core i7-5820K uses Haswell-E (2014) (22 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i7-5820K's 9,826 — a 66.1% lead for the Core i5-12400F. Cinebench R23 multi-core: 12,380 vs 5,700 (73.9% advantage for the Core i5-12400F). Geekbench 6 single-core — the metric most relevant to gaming — records 1,700 vs 1,134, a 39.9% lead for the Core i5-12400F that directly translates to higher frame rates. Multi-core Geekbench: 657 vs 5,383 (156.5% advantage for the Core i7-5820K). L3 cache: 18 MB (total) on the Core i5-12400F vs 15 MB (total) on the Core i7-5820K.

Feature	Core i5-12400F	Core i7-5820K
Cores / Threads	6 / 12	6 / 12
Boost Clock	4.4 GHz+22%	3.6 GHz
Base Clock	2.5 GHz	3.3 GHz+32%
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-68%	22 nm
Architecture	Alder Lake-S (2022)	Haswell-E (2014)
PassMark	19,532+99%	9,826
Cinebench R23 Multi	12,380+117%	5,700
Geekbench 6 Single	1,700+50%	1,134
Geekbench 6 Multi	657	5,383+719%

🧠

Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i7-5820K uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR4-2133 on the Core i7-5820K — the Core i5-12400F supports 22.2% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i5-12400F supports up to 128 GB of RAM compared to 64 GB — 66.7% more capacity for professional workloads. Memory channels: 2 (Core i5-12400F) vs 4 (Core i7-5820K). PCIe lanes: 20 (Core i5-12400F) vs 28 (Core i7-5820K) — the Core i7-5820K offers 8 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and Intel X99 (Core i7-5820K).

Feature	Core i5-12400F	Core i7-5820K
Socket	LGA1700	LGA2011
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR5-4800, DDR4-3200+25%	DDR4-2133
Max RAM Capacity	128 GB+100%	64 GB
RAM Channels	2	4+100%
ECC Support	No	No
PCIe Lanes	20	28+40%

🔧

Advanced Features

Virtualization support: VT-x, VT-d, EPT (Core i5-12400F) vs Yes (Core i7-5820K). Primary use case: Core i5-12400F targets Gaming Performance/Value, Core i7-5820K targets Enthusiast Workstation. Direct competitor: Core i5-12400F rivals Ryzen 5 5600; Core i7-5820K rivals Ryzen 5 1600.

Feature	Core i5-12400F	Core i7-5820K
Integrated GPU	No	No
Unlocked	—	Yes
AVX-512	—	No
Virtualization	VT-x, VT-d, EPT	Yes
Target Use	Gaming Performance/Value	Enthusiast Workstation

💰

Value Analysis

The Core i5-12400F launched at $174 MSRP, while the Core i7-5820K debuted at $389. On MSRP ($174 vs $389), the Core i5-12400F is $215 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 25.3 pts/$ for the Core i7-5820K — making the Core i5-12400F the 126.5% better value option.