Core 2 Quad Q8400 vs Phenom II X4 830

Core 2 Quad Q8400 vs Phenom II X4 830 Performance Spectrum

Core 2 Quad Q8400

4 / 4

2,076

+0.2%

2,072

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

About PassMark

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 Quad Q8400 vs Phenom II X4 830 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 Quad Q8400 vs Phenom II X4 830: 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 Quad Q8400

2009

Why buy it

✅Better for gaming: +3.8% higher average FPS across 50 shared CPU benchmark tests.
✅Includes a boxed cooler (true), unlike Phenom II X4 830.

Trade-offs

❌Launch MSRP is still $183 MSRP, while Phenom II X4 830 mostly shows up through inconsistent older-market listings.

Phenom II X4 830

2009

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Core 2 Quad Q8400 across 50 shared CPU benchmark tests.
❌Lower PassMark (2,072 vs 2,076).
❌No boxed cooler included, unlike Core 2 Quad Q8400.

Quick Answers

So, is Core 2 Quad Q8400 better than Phenom II X4 830?

Yes. Core 2 Quad Q8400 is the better all-around CPU here. It gives you a 3.8% average FPS lead across 50 shared CPU game tests in our data, 0.2% 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 Quad Q8400 is the better pick. According to our tests, it delivers 3.8% 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 0.2% 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 at an unclear MSRP at $183 MSRP versus unclear MSRP, and it still gives you a 3.8% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (11.3 vs 0.0 PassMark/$), 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 more multi-core headroom with 4 cores / 4 threads instead of 4/4. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Core 2 Quad Q8400 vs Phenom II X4 830 Technical Specifications

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

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.

Phenom II X4 830

The Phenom II X4 830 is manufactured by AMD. It was released in 1 September 2009 (16 years ago). It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.8 GHz, with boost up to 2.8 GHz. L3 cache: 4 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 2,072 points. Launch price was $80.

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Processing Power

Both the Core 2 Quad Q8400 and Phenom II X4 830 share an identical 4-core/4-thread configuration. Boost clocks reach 0.67 GHz on the Core 2 Quad Q8400 versus 2.8 GHz on the Phenom II X4 830 — a 122.8% clock advantage for the Phenom II X4 830 (base: 2.66 GHz vs 2.8 GHz). The Core 2 Quad Q8400 uses the Yorkfield (2007−2009) architecture (45 nm), while the Phenom II X4 830 uses Deneb (2009−2011) (45 nm). In PassMark, the Core 2 Quad Q8400 scores 2,076 against the Phenom II X4 830's 2,072 — a 0.2% lead for the Core 2 Quad Q8400. L3 cache: 0 kB on the Core 2 Quad Q8400 vs 4 MB (total) on the Phenom II X4 830.

Feature	Core 2 Quad Q8400	Phenom II X4 830
Cores / Threads	4 / 4	4 / 4
Boost Clock	0.67 GHz	2.8 GHz+318%
Base Clock	2.66 GHz	2.8 GHz+5%
L3 Cache	0 kB	4 MB (total)
L2 Cache	4 MB (total)+700%	512 kB (per core)
Process	45 nm	45 nm
Architecture	Yorkfield (2007−2009)	Deneb (2009−2011)
PassMark	2,076	2,072
Cinebench R23 Multi	852	—
Geekbench 6 Single	369	—
Geekbench 6 Multi	1,155	—

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Memory & Platform

The Core 2 Quad Q8400 uses the LGA775 socket (PCIe 1.1), while the Phenom II X4 830 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.