Core 2 Duo E4400 vs Core 2 Duo E8435

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 E4400 vs Core 2 Duo E8435 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 E4400 vs Core 2 Duo E8435: 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 E4400

2007

Why buy it

✅Costs $37 less on MSRP ($113 MSRP vs $150 MSRP).
✅Delivers 31.7% more PassMark for each dollar spent, at 9.7 vs 7.4 PassMark/$ ($113 MSRP vs $150 MSRP).
✅Includes a boxed cooler (Yes), unlike Core 2 Duo E8435.

Trade-offs

❌Worse for gaming: lower average FPS than Core 2 Duo E8435 across 50 shared CPU benchmark tests.
❌Lower PassMark (1,095 vs 1,104).
❌47.7% higher power demand at 65W vs 44W.

Core 2 Duo E8435

2009

Why buy it

✅Better for gaming: +3.6% higher average FPS across 50 shared CPU benchmark tests.
✅Draws 44W instead of 65W, a 21W reduction.

Trade-offs

❌Lower PassMark per dollar, at 7.4 vs 9.7 PassMark/$ ($150 MSRP vs $113 MSRP).
❌No boxed cooler included, unlike Core 2 Duo E4400.

Quick Answers

So, is Core 2 Duo E8435 better than Core 2 Duo E4400?

Yes. Core 2 Duo E8435 is the better all-around CPU here. It gives you a 3.6% average FPS lead across 50 shared CPU game tests in our data, 0.8% 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 2 Duo E8435 is the better pick. According to our tests, it delivers 3.6% 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 2 Duo E8435 is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo E8435 is still the much better call for a fresh build. Core 2 Duo E8435 comes in 32.7% more expensive on MSRP at $150 MSRP versus $113 MSRP, and it still gives you a 3.6% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo E4400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2007 platform. Even with 31.7% better value on paper (9.7 vs 7.4 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on LGA775.

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

Core 2 Duo E8435 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2007) and more multi-core headroom with 2 cores / 2 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 E4400 vs Core 2 Duo E8435 Technical Specifications

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

Core 2 Duo E4400

The Core 2 Duo E4400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Allendale (2006−2009) architecture. It features 2 cores and 2 threads. Base frequency is 2 GHz, with boost up to 2 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,095 points. Launch price was $249.

Core 2 Duo E8435

The Core 2 Duo E8435 is manufactured by Intel. It was released in 2008-01-01. It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 3.067 GHz, with boost up to 0.07 GHz. L2 cache: 6 MB (total). Built on 45 nm process technology. Socket: P. Thermal design power (TDP): 44 Watt. Memory support: DDR2, DDR3. Passmark benchmark score: 1,104 points. Launch price was $249.

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Processing Power

Both the Core 2 Duo E4400 and Core 2 Duo E8435 share an identical 2-core/2-thread configuration. Boost clocks reach 2 GHz on the Core 2 Duo E4400 versus 0.07 GHz on the Core 2 Duo E8435 — a 186.5% clock advantage for the Core 2 Duo E4400 (base: 2 GHz vs 3.067 GHz). The Core 2 Duo E4400 uses the Allendale (2006−2009) architecture (65 nm), while the Core 2 Duo E8435 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E4400 scores 1,095 against the Core 2 Duo E8435's 1,104 — a 0.8% lead for the Core 2 Duo E8435. Geekbench 6 single-core — the metric most relevant to gaming — records 208 vs 257, a 21.1% lead for the Core 2 Duo E8435 that directly translates to higher frame rates.

Feature	Core 2 Duo E4400	Core 2 Duo E8435
Cores / Threads	2 / 2	2 / 2
Boost Clock	2 GHz+2757%	0.07 GHz
Base Clock	2 GHz	3.067 GHz+53%
L3 Cache	0 kB	—
L2 Cache	2 MB	6 MB (total)+200%
Process	65 nm	45 nm-31%
Architecture	Allendale (2006−2009)	Penryn (2008−2011)
PassMark	1,095	1,104
Geekbench 6 Single	208	257+24%

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Memory & Platform

The Core 2 Duo E4400 uses the LGA775 socket (PCIe 1.1), while the Core 2 Duo E8435 uses P (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR2-1066 on the Core 2 Duo E4400 versus DDR3-1333 on the Core 2 Duo E8435 — the Core 2 Duo E8435 supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 16 GB of RAM. Both feature 2-channel memory with ECC support. Both provide 0 PCIe lanes. Chipset compatibility: RS600,Q965 (Core 2 Duo E4400) and Socket P (Core 2 Duo E8435).

Feature	Core 2 Duo E4400	Core 2 Duo E8435
Socket	LGA775	P
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-1066	DDR3-1333+25%
Max RAM Capacity	16 GB	16 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	0

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Advanced Features

Neither processor supports overclocking. Virtualization support: None (Core 2 Duo E4400) vs VT-x, VT-d (Core 2 Duo E8435). Primary use case: Core 2 Duo E4400 targets Budget. Direct competitor: Core 2 Duo E4400 rivals Athlon II X2 240.

Feature	Core 2 Duo E4400	Core 2 Duo E8435
Integrated GPU	No	No
Unlocked	No	No
AVX-512	No	No
Virtualization	None	VT-x, VT-d
Target Use	Budget	—

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Value Analysis

At launch, the Core 2 Duo E4400 was priced at $113, while the Core 2 Duo E8435 came in at $150. On launch pricing ($113 vs $150), Core 2 Duo E4400 was $37 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core 2 Duo E4400 delivers 9.7 pts/$ vs 7.4 pts/$ for the Core 2 Duo E8435 — making the Core 2 Duo E4400 the 27.3% better value option.

Feature	Core 2 Duo E4400	Core 2 Duo E8435
MSRP	$113-25%	$150
Performance per Dollar	9.7+31%	7.4
Release Date	2007	2009

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