Athlon X2 QL-66 vs Pentium 4425Y

Athlon X2 QL-66 vs Pentium 4425Y Performance Spectrum

Athlon X2 QL-66

2 / 2

1,695

0.0%

Ryzen Threadripper PRO 5945WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium 4425Y

2 / 4

1,699

+0.2%

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.

Athlon X2 QL-66 vs Pentium 4425Y 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.

Athlon X2 QL-66 vs Pentium 4425Y: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Athlon X2 QL-66

2009

Why buy it

✅Draws 1W instead of 6W, a 5W reduction.

Trade-offs

❌Lower PassMark (1,695 vs 1,699).
❌Launch MSRP is still $150 MSRP, while Pentium 4425Y mostly shows up through inconsistent older-market listings.

Pentium 4425Y

2019

Why buy it

Trade-offs

❌500% higher power demand at 6W vs 1W.

Quick Answers

So, is Pentium 4425Y better than Athlon X2 QL-66?

Yes. Pentium 4425Y is the better all-around CPU here. It gives you a 2.2% 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, Pentium 4425Y is the better pick. According to our tests, it delivers 2.2% 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, Pentium 4425Y is the stronger fit. You are getting 0.2% better PassMark, backed by 2 cores and 4 threads.

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

Pentium 4425Y is still the much better call for a fresh build. Pentium 4425Y comes in at an unclear MSRP at unclear MSRP versus $150 MSRP, and it still gives you a 2.2% average FPS lead across 50 shared CPU game tests in our data. Athlon X2 QL-66 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2009 platform. Even with 100.0% better value on paper (11.3 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on S1g2.

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

Pentium 4425Y makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2019 vs 2009) and more multi-core headroom with 2 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.

Athlon X2 QL-66 vs Pentium 4425Y Technical Specifications

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

Athlon X2 QL-66

The Athlon X2 QL-66 is manufactured by AMD. It was released in 2009-01-01. It is based on the Lion (2008−2009) architecture. It features 2 cores and 2 threads. Max frequency: 2.2 GHz. L2 cache: 1 MB. Built on 65 nm process technology. Socket: S1g2. Thermal design power (TDP): 1 MB. Passmark benchmark score: 1,695 points. Launch price was $149.

Pentium 4425Y

The Pentium 4425Y is manufactured by Intel. It was released in 2007-01-01. It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 4 threads. Base frequency: 1.7 GHz. L3 cache: 2 MB. Built on 14 nm process technology. Socket: FCBGA1515. Thermal design power (TDP): 6 Watt. Memory support: LPDDR3-1866, DDR3L-1600. Passmark benchmark score: 1,699 points. Launch price was $69.

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Processing Power

The Athlon X2 QL-66 packs 2 cores / 2 threads, matching the Pentium 4425Y's 2 cores. The Athlon X2 QL-66 uses the Lion (2008−2009) architecture (65 nm), while the Pentium 4425Y uses NetBurst (2000−2006) (14 nm). In PassMark, the Athlon X2 QL-66 scores 1,695 against the Pentium 4425Y's 1,699 — a 0.2% lead for the Pentium 4425Y.

Feature	Athlon X2 QL-66	Pentium 4425Y
Cores / Threads	2 / 2	2 / 4
Boost Clock	2.2 GHz	—
Base Clock	—	1.7 GHz
L3 Cache	—	2 MB
L2 Cache	1 MB	—
Process	65 nm	14 nm-78%
Architecture	Lion (2008−2009)	NetBurst (2000−2006)
PassMark	1,695	1,699

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Memory & Platform

The Athlon X2 QL-66 uses the S1g2 socket (PCIe 2.0), while the Pentium 4425Y uses FCBGA1515 (PCIe 3.0) — making them incompatible on the same motherboard.