Core 2 Extreme X9100 vs Core 2 Quad Q8400

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 Extreme X9100 vs Core 2 Quad Q8400 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 Extreme X9100 vs Core 2 Quad Q8400: 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 Extreme X9100

2008

Why buy it

✅Draws 44W instead of 95W, a 51W reduction.

Trade-offs

❌Lower PassMark (2,063 vs 2,076).
❌Lower PassMark per dollar, at 2.4 vs 11.3 PassMark/$ ($851 MSRP vs $183 MSRP).
❌No boxed cooler included, unlike Core 2 Quad Q8400.

Core 2 Quad Q8400

2009

Why buy it

✅Costs $668 less on MSRP ($183 MSRP vs $851 MSRP).
✅Delivers 368.0% more PassMark for each dollar spent, at 11.3 vs 2.4 PassMark/$ ($183 MSRP vs $851 MSRP).
✅Includes a boxed cooler (true), unlike Core 2 Extreme X9100.

Trade-offs

❌115.9% higher power demand at 95W vs 44W.

Quick Answers

So, is Core 2 Quad Q8400 better than Core 2 Extreme X9100?

Yes. Core 2 Quad Q8400 is the better all-around CPU here. It gives you a 0.0% average FPS lead across 50 shared CPU game tests in our data, 0.6% 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 Quad Q8400 is the better pick. According to our tests, it delivers 0.0% 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 2 Quad Q8400 is the stronger fit. You are getting 0.6% better PassMark, backed by 4 cores and 4 threads.

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

Core 2 Quad Q8400 is the better buy right now. Core 2 Quad Q8400 comes in $668 cheaper on MSRP at $183 MSRP versus $851 MSRP, and it still gives you a 0.0% average FPS lead across 50 shared CPU game tests in our data. It is also 368.0% better value on MSRP (11.3 vs 2.4 PassMark/$), 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 2 Quad Q8400 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008) and more multi-core headroom with 4 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 Extreme X9100 vs Core 2 Quad Q8400 Technical Specifications

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

Core 2 Extreme X9100

The Core 2 Extreme X9100 is manufactured by Intel. It was released in 1 July 2008 (17 years ago). It is based on the Penryn XE (2008) architecture. It features 2 cores and 2 threads. Base frequency is 3.06 GHz, with boost up to 0.07 GHz. L3 cache: 0 kB. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 44 Watt. Memory support: DDR2, DDR3 Depends on motherboard. Passmark benchmark score: 2,063 points. Launch price was $851.

Core 2 Quad Q8400

The Core 2 Quad Q8400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Yorkfield (2007−2009) architecture. It features 4 cores and 4 threads. Base frequency is 2.66 GHz, with boost up to 0.67 GHz. L3 cache: 0 kB. L2 cache: 4 MB (total). Built on 45 nm process technology. Socket: LGA775. Thermal design power (TDP): 95 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 2,076 points. Launch price was $249.

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Processing Power

The Core 2 Extreme X9100 packs 2 cores / 2 threads, while the Core 2 Quad Q8400 offers 4 cores / 4 threads — the Core 2 Quad Q8400 has 2 more cores. Boost clocks reach 0.07 GHz on the Core 2 Extreme X9100 versus 0.67 GHz on the Core 2 Quad Q8400 — a 162.2% clock advantage for the Core 2 Quad Q8400 (base: 3.06 GHz vs 2.66 GHz). The Core 2 Extreme X9100 uses the Penryn XE (2008) architecture (45 nm), while the Core 2 Quad Q8400 uses Yorkfield (2007−2009) (45 nm). In PassMark, the Core 2 Extreme X9100 scores 2,063 against the Core 2 Quad Q8400's 2,076 — a 0.6% lead for the Core 2 Quad Q8400. Both processors carry 0 kB of L3 cache.

Feature	Core 2 Extreme X9100	Core 2 Quad Q8400
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	0.07 GHz	0.67 GHz+857%
Base Clock	3.06 GHz+15%	2.66 GHz
L3 Cache	0 kB	0 kB
L2 Cache	6 MB+50%	4 MB (total)
Process	45 nm	45 nm
Architecture	Penryn XE (2008)	Yorkfield (2007−2009)
PassMark	2,063	2,076
Cinebench R23 Multi	—	852
Geekbench 6 Single	—	369
Geekbench 6 Multi	—	1,155

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Memory & Platform

The Core 2 Extreme X9100 uses the PGA478 socket (PCIe 1.1), while the Core 2 Quad Q8400 uses LGA775 (PCIe 1.1) — making them incompatible on the same motherboard.

Feature	Core 2 Extreme X9100	Core 2 Quad Q8400
Socket	PGA478	LGA775
PCIe Generation	PCIe 1.1	PCIe 1.1
Max RAM Speed	—	DDR3 1333 MHz
Max RAM Capacity	—	16 GB
RAM Channels	—	2
ECC Support	—	No
PCIe Lanes	—	0

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Advanced Features

Virtualization: not specified (Core 2 Extreme X9100) / true (Core 2 Quad Q8400). Primary use case: Core 2 Quad Q8400 targets Desktop.

Feature	Core 2 Extreme X9100	Core 2 Quad Q8400
Integrated GPU	—	No
Unlocked	—	No
AVX-512	—	No
Virtualization	—	true
Target Use	—	Desktop

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Value Analysis

At launch, the Core 2 Extreme X9100 was priced at $851, while the Core 2 Quad Q8400 came in at $183. On launch pricing ($851 vs $183), Core 2 Quad Q8400 was $668 cheaper. In terms of value on MSRP (PassMark points per dollar), the Core 2 Extreme X9100 delivers 2.4 pts/$ vs 11.3 pts/$ for the Core 2 Quad Q8400 — making the Core 2 Quad Q8400 the 129.6% better value option.

Feature	Core 2 Extreme X9100	Core 2 Quad Q8400
MSRP	$851	$183-78%
Performance per Dollar	2.4	11.3+371%
Release Date	2008	2009

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