Core 2 Duo E4400 vs Core 2 Duo P9600

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 P9600 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 P9600: 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

✅+0.2% higher PassMark.
✅Includes a boxed cooler (Yes), unlike Core 2 Duo P9600.

Trade-offs

❌Launch MSRP is still $113 MSRP, while Core 2 Duo P9600 mostly shows up through inconsistent older-market listings.
❌983.3% higher power demand at 65W vs 6W.

Core 2 Duo P9600

2009

Why buy it

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

Trade-offs

❌Lower PassMark (1,093 vs 1,095).
❌No boxed cooler included, unlike Core 2 Duo E4400.

Quick Answers

So, is Core 2 Duo P9600 better than Core 2 Duo E4400?

It depends on what you want from the system. For gaming, Core 2 Duo P9600 is ahead with a 1.6% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Core 2 Duo E4400 pulls ahead with 0.2% better PassMark.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Core 2 Duo E4400 is the stronger fit. You are getting 0.2% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo P9600 is still the much better call for a fresh build. Core 2 Duo P9600 comes in at an unclear MSRP at unclear MSRP versus $113 MSRP, and it still gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo E4400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2007 platform. Even with 100.0% better value on paper (9.7 vs 0.0 PassMark/$), 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 P9600 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2007). That makes it the safer long-term bet.

Core 2 Duo E4400 vs Core 2 Duo P9600 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 P9600

The Core 2 Duo P9600 is manufactured by Intel. It was released in 1 January 2009 (16 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.66 GHz, with boost up to 2.66 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 25 Watt. Passmark benchmark score: 1,093 points. Launch price was $348.

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Processing Power

Both the Core 2 Duo E4400 and Core 2 Duo P9600 share an identical 2-core/2-thread configuration. Boost clocks reach 2 GHz on the Core 2 Duo E4400 versus 2.66 GHz on the Core 2 Duo P9600 — a 28.3% clock advantage for the Core 2 Duo P9600 (base: 2 GHz vs 2.66 GHz). The Core 2 Duo E4400 uses the Allendale (2006−2009) architecture (65 nm), while the Core 2 Duo P9600 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E4400 scores 1,095 against the Core 2 Duo P9600's 1,093 — a 0.2% lead for the Core 2 Duo E4400. L3 cache: 0 kB on the Core 2 Duo E4400 vs 6 MB L2 Cache on the Core 2 Duo P9600.

Feature	Core 2 Duo E4400	Core 2 Duo P9600
Cores / Threads	2 / 2	2 / 2
Boost Clock	2 GHz	2.66 GHz+33%
Base Clock	2 GHz	2.66 GHz+33%
L3 Cache	0 kB	6 MB L2 Cache
L2 Cache	2 MB	6 MB+200%
Process	65 nm	45 nm-31%
Architecture	Allendale (2006−2009)	Penryn (2008−2011)
PassMark	1,095	1,093
Geekbench 6 Single	208	—

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Memory & Platform

The Core 2 Duo E4400 uses the LGA775 socket (PCIe 1.1), while the Core 2 Duo P9600 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Duo E4400	Core 2 Duo P9600
Socket	LGA775	PGA478
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	DDR2-1066	—
Max RAM Capacity	16 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: None (Core 2 Duo E4400) / not specified (Core 2 Duo P9600). Primary use case: Core 2 Duo E4400 targets Budget. Direct competitor: Core 2 Duo E4400 rivals Athlon II X2 240.