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 i5-520UM vs Core i5-12400F 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 i5-520UM vs Core i5-12400F: Pros, Cons & Final Verdict

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

Core i5-520UM

2010

Why buy it

✅Draws 18W instead of 65W, a 47W reduction.
✅Integrated graphics onboard with Intel HD Graphics (Ironlake), while Core i5-12400F needs a discrete GPU.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 42 shared CPU benchmark tests.
❌Lower PassMark (1,943 vs 19,532).
❌Smaller total L3 cache (3 MB vs 18 MB).
❌Older platform position on BGA1288, while Core i5-12400F moves to LGA1700 and DDR5.
❌No boxed cooler included, unlike Core i5-12400F.

Core i5-12400F

2022

Why buy it

✅Better for gaming: +366.7% higher average FPS across 42 shared CPU benchmark tests.
✅+500% larger total L3 cache (18 MB vs 3 MB).
✅Newer platform on LGA1700 with DDR5 support instead of BGA1288 and older memory support.
✅25% more PCIe lanes (20 vs 16) for storage and expansion-heavy builds.
✅Includes a boxed cooler (Yes), unlike Core i5-520UM.

Trade-offs

❌Launch MSRP is still $174 MSRP, while Core i5-520UM mostly shows up through inconsistent older-market listings.
❌261.1% higher power demand at 65W vs 18W.
❌No integrated graphics, while Core i5-520UM can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is Core i5-12400F better than Core i5-520UM?

Yes. Core i5-12400F is the better all-around CPU here. It gives you a 366.7% average FPS lead across 42 shared CPU game tests in our data, 905.2% 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 366.7% more average FPS across 42 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 905.2% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 500% larger total L3 cache (18 MB vs 3 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 at an unclear MSRP at $174 MSRP versus unclear MSRP, and it still gives you a 366.7% average FPS lead across 42 shared CPU game tests in our data. It is also 100.0% better value on MSRP (112.3 vs 0.0 PassMark/$), 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 2010), a healthier platform with LGA1700 and DDR5 instead of BGA1288, 500% larger total L3 cache (18 MB vs 3 MB), and more multi-core headroom with 6 cores / 12 threads instead of 2/4. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core i5-520UM vs Core i5-12400F Technical Specifications

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

Core i5-520UM

The Core i5-520UM is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.07 GHz, with boost up to 1.87 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3-800. Passmark benchmark score: 1,943 points. Launch price was $241.

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.

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Processing Power

The Core i5-520UM packs 2 cores / 4 threads, while the Core i5-12400F offers 6 cores / 12 threads — the Core i5-12400F has 4 more cores. Boost clocks reach 1.87 GHz on the Core i5-520UM versus 4.4 GHz on the Core i5-12400F — a 80.7% clock advantage for the Core i5-12400F (base: 1.07 GHz vs 2.5 GHz). The Core i5-520UM uses the Arrandale (2010−2011) architecture (32 nm), while the Core i5-12400F uses Alder Lake-S (2022) (Intel 7 nm). In PassMark, the Core i5-520UM scores 1,943 against the Core i5-12400F's 19,532 — a 163.8% lead for the Core i5-12400F. L3 cache: 3 MB on the Core i5-520UM vs 18 MB (total) on the Core i5-12400F.

Feature	Core i5-520UM	Core i5-12400F
Cores / Threads	2 / 4	6 / 12+200%
Boost Clock	1.87 GHz	4.4 GHz+135%
Base Clock	1.07 GHz	2.5 GHz+134%
L3 Cache	3 MB	18 MB (total)+500%
L2 Cache	512 kB	1.25 MB (per core)+150%
Process	32 nm	Intel 7 nm-78%
Architecture	Arrandale (2010−2011)	Alder Lake-S (2022)
PassMark	1,943	19,532+905%
Cinebench R23 Multi	—	12,380
Geekbench 6 Single	—	1,700
Geekbench 6 Multi	—	657

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Memory & Platform

The Core i5-520UM uses the BGA1288 socket (PCIe 2.0), while the Core i5-12400F uses LGA1700 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 800 on the Core i5-520UM versus DDR5-4800, DDR4-3200 on the Core i5-12400F — the Core i5-12400F supports 500% 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 8 GB — 1500% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (Core i5-520UM) vs 20 (Core i5-12400F) — the Core i5-12400F offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: HM55,HM57,QM57,QS57 (Core i5-520UM) and H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F).

Feature	Core i5-520UM	Core i5-12400F
Socket	BGA1288	LGA1700
PCIe Generation	PCIe 2.0	PCIe 3.0+50%
Max RAM Speed	800	DDR5-4800, DDR4-3200+500%
Max RAM Capacity	8 GB	128 GB+1500%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	20+25%

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Advanced Features

Virtualization support: true (Core i5-520UM) vs VT-x, VT-d, EPT (Core i5-12400F). The Core i5-520UM includes integrated graphics (Intel HD Graphics (Ironlake)), while the Core i5-12400F requires a dedicated GPU. Primary use case: Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-520UM rivals Core 2 Duo SU9400; Core i5-12400F rivals Ryzen 5 5600.

Feature	Core i5-520UM	Core i5-12400F
Integrated GPU	Yes	No
IGPU Model	Intel HD Graphics (Ironlake)	—
Unlocked	No	—
AVX-512	No	—
Virtualization	true	VT-x, VT-d, EPT
Target Use	—	Gaming Performance/Value