Core 2 Duo E4400 vs Core 2 Extreme X9000

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 Extreme X9000 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 Extreme X9000: 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

✅Includes a boxed cooler (Yes), unlike Core 2 Extreme X9000.

Trade-offs

❌Lower PassMark (1,095 vs 1,108).
❌Launch MSRP is still $113 MSRP, while Core 2 Extreme X9000 mostly shows up through inconsistent older-market listings.
❌983.3% higher power demand at 65W vs 6W.

Core 2 Extreme X9000

2008

Why buy it

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

Trade-offs

❌No boxed cooler included, unlike Core 2 Duo E4400.

Quick Answers

So, is Core 2 Extreme X9000 better than Core 2 Duo E4400?

Yes. Core 2 Extreme X9000 is the better all-around CPU here. It gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data, 1.2% 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 2 Extreme X9000 is the better pick. According to our tests, it delivers 1.9% 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 Extreme X9000 is the stronger fit. You are getting 1.2% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Extreme X9000 is still the much better call for a fresh build. Core 2 Extreme X9000 comes in at an unclear MSRP at unclear MSRP versus $113 MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo E4400 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2007 platform. Even with 100.0% better value on paper (9.7 vs 0.0 PassMark/$), 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 Extreme X9000 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2008 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 Extreme X9000 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 Extreme X9000

The Core 2 Extreme X9000 is manufactured by Intel. It was released in 10 January 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Passmark benchmark score: 1,108 points. Launch price was $851.

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Processing Power

Both the Core 2 Duo E4400 and Core 2 Extreme X9000 share an identical 2-core/2-thread configuration. Boost clocks reach 2 GHz on the Core 2 Duo E4400 versus 2.8 GHz on the Core 2 Extreme X9000 — a 33.3% clock advantage for the Core 2 Extreme X9000 (base: 2 GHz vs 2.8 GHz). The Core 2 Duo E4400 uses the Allendale (2006−2009) architecture (65 nm), while the Core 2 Extreme X9000 uses Penryn (2008−2011) (45 nm). In PassMark, the Core 2 Duo E4400 scores 1,095 against the Core 2 Extreme X9000's 1,108 — a 1.2% lead for the Core 2 Extreme X9000. L3 cache: 0 kB on the Core 2 Duo E4400 vs 6 MB L2 Cache on the Core 2 Extreme X9000.

Feature	Core 2 Duo E4400	Core 2 Extreme X9000
Cores / Threads	2 / 2	2 / 2
Boost Clock	2 GHz	2.8 GHz+40%
Base Clock	2 GHz	2.8 GHz+40%
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	1,108+1%
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 Extreme X9000 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Duo E4400	Core 2 Extreme X9000
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 Extreme X9000). Primary use case: Core 2 Duo E4400 targets Budget. Direct competitor: Core 2 Duo E4400 rivals Athlon II X2 240.