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 2 Duo SL9400 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 2 Duo SL9400 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 2 Duo SL9400

2008

Why buy it

✅Draws 6W instead of 65W, a 59W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i5-12400F across 50 shared CPU benchmark tests.
❌Lower PassMark (2,144 vs 19,532).
❌Smaller total L3 cache (6 MB vs 18 MB).
❌Lower PassMark per dollar, at 7.5 vs 112.3 PassMark/$ ($284 MSRP vs $174 MSRP).
❌Older platform position on BGA956, while Core i5-12400F moves to LGA1700 and DDR5.

Core i5-12400F

2022

Why buy it

✅Better for gaming: +317.6% higher average FPS across 50 shared CPU benchmark tests.
✅+200% larger total L3 cache (18 MB vs 6 MB).
✅Costs $110 less on MSRP ($174 MSRP vs $284 MSRP).
✅Delivers 1386.9% more PassMark for each dollar spent, at 112.3 vs 7.5 PassMark/$ ($174 MSRP vs $284 MSRP).
✅Newer platform on LGA1700 with DDR5 support instead of BGA956 and older memory support.

Trade-offs

❌983.3% higher power demand at 65W vs 6W.

Quick Answers

So, is Core i5-12400F better than Core 2 Duo SL9400?

Yes. Core i5-12400F is the better all-around CPU here. It gives you a 317.6% average FPS lead across 50 shared CPU game tests in our data, 811% 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 317.6% 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 811% better PassMark, backed by 6 cores and 12 threads. It also has the larger cache pool with 200% larger total L3 cache (18 MB vs 6 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 $110 cheaper on MSRP at $174 MSRP versus $284 MSRP, and it still gives you a 317.6% average FPS lead across 50 shared CPU game tests in our data. It is also 1386.9% better value on MSRP (112.3 vs 7.5 PassMark/$), 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 2008), a healthier platform with LGA1700 and DDR5 instead of BGA956, 200% larger total L3 cache (18 MB vs 6 MB), and more multi-core headroom with 6 cores / 12 threads instead of 2/2. That gives you a healthier platform runway for motherboard, RAM, and later CPU upgrades.

Core 2 Duo SL9400 vs Core i5-12400F Technical Specifications

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

Core 2 Duo SL9400

The Core 2 Duo SL9400 is manufactured by Intel. It was released in 20 August 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 1.86 GHz, with boost up to 1.86 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: BGA956. Thermal design power (TDP): 17 Watt. Passmark benchmark score: 2,144 points. Launch price was $284.

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 2 Duo SL9400 packs 2 cores / 2 threads, while the Core i5-12400F offers 6 cores / 12 threads — the Core i5-12400F has 4 more cores. Boost clocks reach 1.86 GHz on the Core 2 Duo SL9400 versus 4.4 GHz on the Core i5-12400F — a 81.2% clock advantage for the Core i5-12400F (base: 1.86 GHz vs 2.5 GHz). The Core 2 Duo SL9400 uses the Penryn (2008−2011) architecture (45 nm), while the Core i5-12400F uses Alder Lake-S (2022) (Intel 7 nm). In PassMark, the Core 2 Duo SL9400 scores 2,144 against the Core i5-12400F's 19,532 — a 160.4% lead for the Core i5-12400F. L3 cache: 6 MB L2 Cache on the Core 2 Duo SL9400 vs 18 MB (total) on the Core i5-12400F.

Feature	Core 2 Duo SL9400	Core i5-12400F
Cores / Threads	2 / 2	6 / 12+200%
Boost Clock	1.86 GHz	4.4 GHz+137%
Base Clock	1.86 GHz	2.5 GHz+34%
L3 Cache	6 MB L2 Cache	18 MB (total)+200%
L2 Cache	6 MB+380%	1.25 MB (per core)
Process	45 nm	Intel 7 nm-84%
Architecture	Penryn (2008−2011)	Alder Lake-S (2022)
PassMark	2,144	19,532+811%
Cinebench R23 Multi	—	12,380
Geekbench 6 Single	—	1,700
Geekbench 6 Multi	—	657

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Memory & Platform

The Core 2 Duo SL9400 uses the BGA956 socket (PCIe 1.1), while the Core i5-12400F uses LGA1700 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3-1066 on the Core 2 Duo SL9400 versus DDR5-4800, DDR4-3200 on the Core i5-12400F — the Core i5-12400F supports 350.3% 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 2 Duo SL9400) vs 20 (Core i5-12400F) — the Core i5-12400F offers 4 more lanes for additional GPUs or NVMe drives. Chipset compatibility: GS45,GM45,PM45 (Core 2 Duo SL9400) and H610,B660,H670,Z690,B760,H770,Z790 (Core i5-12400F).

Feature	Core 2 Duo SL9400	Core i5-12400F
Socket	BGA956	LGA1700
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	DDR3-1066	DDR5-4800, DDR4-3200+350%
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: VT-x (Core 2 Duo SL9400) vs VT-x, VT-d, EPT (Core i5-12400F). Primary use case: Core 2 Duo SL9400 targets Mobile, Core i5-12400F targets Gaming Performance/Value. Direct competitor: Core i5-12400F rivals Ryzen 5 5600.

Feature	Core 2 Duo SL9400	Core i5-12400F
Integrated GPU	No	No
Virtualization	VT-x	VT-x, VT-d, EPT
Target Use	Mobile	Gaming Performance/Value

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Value Analysis

At launch, the Core 2 Duo SL9400 was priced at $284, while the Core i5-12400F came in at $174. On launch pricing ($284 vs $174), Core i5-12400F was $110 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core 2 Duo SL9400 delivers 7.5 pts/$ vs 112.3 pts/$ for the Core i5-12400F — making the Core i5-12400F the 174.8% better value option.

Feature	Core 2 Duo SL9400	Core i5-12400F
MSRP	$284	$174-39%
Performance per Dollar	7.5	112.3+1397%
Release Date	2008	2022

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