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 i7-3820 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 i7-3820: 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

✅Better for gaming: +86.3% higher average FPS across 50 shared CPU benchmark tests.
✅+80% larger total L3 cache (18 MB vs 10 MB).
✅Costs $112 less on MSRP ($174 MSRP vs $286 MSRP).
✅Delivers 454.8% more PassMark for each dollar spent, at 112.3 vs 20.2 PassMark/$ ($174 MSRP vs $286 MSRP).
✅Draws 65W instead of 130W, a 65W reduction.

Trade-offs

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

Core i7-3820

2012

Why buy it

✅100% more PCIe lanes (40 vs 20) for storage and expansion-heavy builds.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (5,787 vs 19,532).
❌Smaller total L3 cache (10 MB vs 18 MB).
❌Lower PassMark per dollar, at 20.2 vs 112.3 PassMark/$ ($286 MSRP vs $174 MSRP).
❌100% higher power demand at 130W vs 65W.

Quick Answers

So, is Core i5-12400F better than Core i7-3820?

Yes. Core i5-12400F is the better all-around CPU here. It gives you a 86.3% average FPS lead across 50 shared CPU game tests in our data, 237.5% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i5-12400F is the better pick. According to our tests, it delivers 86.3% more average FPS across 50 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 stronger fit. You are getting 237.5% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 80% larger total L3 cache (18 MB vs 10 MB).

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 $112 cheaper on MSRP at $174 MSRP versus $286 MSRP, and it still gives you a 86.3% average FPS lead across 50 shared CPU game tests in our data. It is also 454.8% better value on MSRP (112.3 vs 20.2 PassMark/$), 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 2012), a healthier platform with LGA1700 and DDR5 instead of LGA2011, 80% larger total L3 cache (18 MB vs 10 MB), and more multi-core headroom with 6 cores / 12 threads instead of 4/8. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-12400F vs Core i7-3820 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 i7-3820

The Core i7-3820 is manufactured by Intel. It was released in Fevereiro 2012 (13 years ago). It is based on the Sandy Bridge-E (2011−2013) architecture. It features 4 cores and 8 threads. Base frequency is 3.6 GHz, with boost up to 3.8 GHz. L3 cache: 10240 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 130 Watt. Memory support: DDR3. Passmark benchmark score: 5,787 points. Launch price was $400.

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Processing Power

The Core i5-12400F packs 6 cores / 12 threads, while the Core i7-3820 offers 4 cores / 8 threads — the Core i5-12400F has 2 more cores. Boost clocks reach 4.4 GHz on the Core i5-12400F versus 3.8 GHz on the Core i7-3820 — a 14.6% clock advantage for the Core i5-12400F (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 i7-3820 uses Sandy Bridge-E (2011−2013) (32 nm). In PassMark, the Core i5-12400F scores 19,532 against the Core i7-3820's 5,787 — a 108.6% lead for the Core i5-12400F. Geekbench 6 single-core — the metric most relevant to gaming — records 1,700 vs 624, a 92.6% lead for the Core i5-12400F that directly translates to higher frame rates. L3 cache: 18 MB (total) on the Core i5-12400F vs 10240 kB (total) on the Core i7-3820.

Feature	Core i5-12400F	Core i7-3820
Cores / Threads	6 / 12+50%	4 / 8
Boost Clock	4.4 GHz+16%	3.8 GHz
Base Clock	2.5 GHz	3.6 GHz+44%
L3 Cache	18 MB (total)+80%	10240 kB (total)
L2 Cache	1.25 MB (per core)+400%	256 kB (per core)
Process	Intel 7 nm-78%	32 nm
Architecture	Alder Lake-S (2022)	Sandy Bridge-E (2011−2013)
PassMark	19,532+238%	5,787
Cinebench R23 Multi	12,380	—
Geekbench 6 Single	1,700+172%	624
Geekbench 6 Multi	657	—

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Memory & Platform

The Core i5-12400F uses the LGA1700 socket (PCIe 3.0), while the Core i7-3820 uses LGA2011 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR5-4800, DDR4-3200 on the Core i5-12400F versus DDR3-1600 on the Core i7-3820 — the Core i5-12400F supports 200% 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 — 100% more capacity for professional workloads. Memory channels: 2 (Core i5-12400F) vs 4 (Core i7-3820). PCIe lanes: 20 (Core i5-12400F) vs 40 (Core i7-3820) — the Core i7-3820 offers 20 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F) and X79 (Core i7-3820).

Feature	Core i5-12400F	Core i7-3820
Socket	LGA1700	LGA2011
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR5-4800, DDR4-3200+200%	DDR3-1600
Max RAM Capacity	128 GB+100%	64 GB
RAM Channels	2	4+100%
ECC Support	No	No
PCIe Lanes	20	40+100%

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Advanced Features

Both support VT-x, VT-d, EPT virtualization. Primary use case: Core i5-12400F targets Gaming Performance/Value, Core i7-3820 targets HEDT Desktop. Direct competitor: Core i5-12400F rivals Ryzen 5 5600; Core i7-3820 rivals FX-8350.

Feature	Core i5-12400F	Core i7-3820
Integrated GPU	No	No
IGPU Model	—	None
Unlocked	—	Yes
AVX-512	—	No
Virtualization	VT-x, VT-d, EPT	VT-x, VT-d, EPT
Target Use	Gaming Performance/Value	HEDT Desktop

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Value Analysis

At launch, the Core i5-12400F was priced at $174, while the Core i7-3820 came in at $286. On launch pricing ($174 vs $286), Core i5-12400F was $112 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core i5-12400F delivers 112.3 pts/$ vs 20.2 pts/$ for the Core i7-3820 — making the Core i5-12400F the 138.9% better value option.

Feature	Core i5-12400F	Core i7-3820
MSRP	$174-39%	$286
Performance per Dollar	112.3+456%	20.2
Release Date	2022	2012

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