Core 2 Duo P8400 vs Core i3-4100M

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 P8400 vs Core i3-4100M 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 P8400 vs Core i3-4100M: 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 P8400

2008

Why buy it

✅Costs $16 less on MSRP ($209 MSRP vs $225 MSRP).
✅Draws 3W instead of 512W, a 509W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Core i3-4100M across 50 shared CPU benchmark tests.
❌Lower PassMark (2,497 vs 2,531).
❌No integrated graphics, while Core i3-4100M can still boot and troubleshoot without a discrete GPU.

Core i3-4100M

2013

Why buy it

✅Better for gaming: +3.0% higher average FPS across 50 shared CPU benchmark tests.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with HD Graphics 4600, while Core 2 Duo P8400 needs a discrete GPU.

Trade-offs

❌
7.7% HIGHER MSRP
$225 MSRPvs$209 MSRP
❌16966.7% higher power demand at 512W vs 3W.

Quick Answers

So, is Core i3-4100M better than Core 2 Duo P8400?

Yes. Core i3-4100M is the better all-around CPU here. It gives you a 3.0% average FPS lead across 50 shared CPU game tests in our data, 1.4% 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 i3-4100M is the better pick. According to our tests, it delivers 3.0% 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 i3-4100M is the stronger fit. You are getting 1.4% better PassMark, backed by 2 cores and 4 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Core i3-4100M is still the much better call for a fresh build. Core i3-4100M comes in 7.7% more expensive on MSRP at $225 MSRP versus $209 MSRP, and it still gives you a 3.0% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo P8400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2008 platform. Even with 6.2% better value on paper (11.9 vs 11.2 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA478.

Which one is more future-proof for 2026 and beyond?

Core i3-4100M makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2008) and more multi-core headroom with 2 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Duo P8400 vs Core i3-4100M Technical Specifications

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

Core 2 Duo P8400

The Core 2 Duo P8400 is manufactured by Intel. It was released in 15 July 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.26 GHz, with boost up to 2.26 GHz. L3 cache: 3 MB L2 Cache. L2 cache: 3 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 25 Watt. Passmark benchmark score: 2,497 points. Launch price was $209.

Core i3-4100M

The Core i3-4100M is manufactured by Intel. It was released in 4 June 2013 (12 years ago). It is based on the Haswell (2013−2015) architecture. It features 2 cores and 4 threads. Base frequency is 2.5 GHz, with boost up to 2.5 GHz. L3 cache: 3 MB. L2 cache: 512 kB. Built on 22 nm process technology. Socket: PGA946. Thermal design power (TDP): 37 Watt. Memory support: DDR3. Passmark benchmark score: 2,531 points. Launch price was $225.

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Processing Power

The Core 2 Duo P8400 packs 2 cores / 2 threads, matching the Core i3-4100M's 2 cores. Boost clocks reach 2.26 GHz on the Core 2 Duo P8400 versus 2.5 GHz on the Core i3-4100M — a 10.1% clock advantage for the Core i3-4100M (base: 2.26 GHz vs 2.5 GHz). The Core 2 Duo P8400 uses the Penryn (2008−2011) architecture (45 nm), while the Core i3-4100M uses Haswell (2013−2015) (22 nm). In PassMark, the Core 2 Duo P8400 scores 2,497 against the Core i3-4100M's 2,531 — a 1.4% lead for the Core i3-4100M. L3 cache: 3 MB L2 Cache on the Core 2 Duo P8400 vs 3 MB on the Core i3-4100M.

Feature	Core 2 Duo P8400	Core i3-4100M
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.26 GHz	2.5 GHz+11%
Base Clock	2.26 GHz	2.5 GHz+11%
L3 Cache	3 MB L2 Cache	3 MB
L2 Cache	3 MB+500%	512 kB
Process	45 nm	22 nm-51%
Architecture	Penryn (2008−2011)	Haswell (2013−2015)
PassMark	2,497	2,531+1%

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Memory & Platform

The Core 2 Duo P8400 uses the PGA478 socket (PCIe 1.1), while the Core i3-4100M uses PGA946 (PCIe 3.0) — making them incompatible on the same motherboard. Maximum memory speed reaches 1066 on the Core 2 Duo P8400 versus DDR3L-1600 on the Core i3-4100M — the Core i3-4100M supports 50.1% faster memory, which can translate to measurable gains in memory-sensitive workloads. The Core i3-4100M supports up to 32 GB of RAM compared to 8 GB — 300% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 0 (Core 2 Duo P8400) vs 16 (Core i3-4100M) — the Core i3-4100M offers 16 more lanes for additional GPUs or NVMe drives.

Feature	Core 2 Duo P8400	Core i3-4100M
Socket	PGA478	PGA946
PCIe Generation	PCIe 1.1	PCIe 3.0+173%
Max RAM Speed	1066	DDR3L-1600+50%
Max RAM Capacity	8 GB	32 GB+300%
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	16

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Advanced Features

Neither processor supports overclocking. Virtualization support: true (Core 2 Duo P8400) vs VT-x, VT-d (Core i3-4100M). The Core i3-4100M includes integrated graphics (HD Graphics 4600), while the Core 2 Duo P8400 requires a dedicated GPU. Primary use case: Core i3-4100M targets Mobile. Direct competitor: Core 2 Duo P8400 rivals Turion II Ultra M600.

Feature	Core 2 Duo P8400	Core i3-4100M
Integrated GPU	No	Yes
IGPU Model	None	HD Graphics 4600
Unlocked	No	No
AVX-512	No	No
Virtualization	true	VT-x, VT-d
Target Use	—	Mobile

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Value Analysis

At launch, the Core 2 Duo P8400 was priced at $209, while the Core i3-4100M came in at $225. On launch pricing ($209 vs $225), Core 2 Duo P8400 was $16 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core 2 Duo P8400 delivers 11.9 pts/$ vs 11.2 pts/$ for the Core i3-4100M — making the Core 2 Duo P8400 the 6% better value option.

Feature	Core 2 Duo P8400	Core i3-4100M
MSRP	$209-7%	$225
Performance per Dollar	11.9+6%	11.2
Release Date	2008	2013

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