Athlon 64 FX-72 vs Phenom II X3 B75

Athlon 64 FX-72 vs Phenom II X3 B75 Performance Spectrum

Athlon 64 FX-72

2 / 2

1,794

+0.6%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Phenom II X3 B75

3 / 3

1,783

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.

Athlon 64 FX-72 vs Phenom II X3 B75 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 64 FX-72 vs Phenom II X3 B75: Pros, Cons & Final Verdict

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

Athlon 64 FX-72

2006

Why buy it

✅+0.6% higher PassMark.

Trade-offs

❌Launch MSRP is still $799 MSRP, while Phenom II X3 B75 mostly shows up through inconsistent older-market listings.
❌31.6% higher power demand at 125W vs 95W.

Phenom II X3 B75

2009

Why buy it

✅Draws 95W instead of 125W, a 30W reduction.

Trade-offs

❌Lower PassMark (1,783 vs 1,794).

Quick Answers

So, is Phenom II X3 B75 better than Athlon 64 FX-72?

It depends on what you want from the system. For gaming, Phenom II X3 B75 is ahead with a 2.1% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Athlon 64 FX-72 pulls ahead with 0.6% better PassMark.

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

For streaming, content creation, and heavier multitasking, Athlon 64 FX-72 is the stronger fit. You are getting 0.6% better PassMark, backed by 2 cores and 2 threads.

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

Phenom II X3 B75 is still the much better call for a fresh build. Phenom II X3 B75 comes in at an unclear MSRP at unclear MSRP versus $799 MSRP, and it still gives you a 2.1% average FPS lead across 50 shared CPU game tests in our data. Athlon 64 FX-72 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2006 platform. Even with 100.0% better value on paper (2.2 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on F.

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

Phenom II X3 B75 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2006). That makes it the safer long-term bet.

Athlon 64 FX-72 vs Phenom II X3 B75 Technical Specifications

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

Athlon 64 FX-72

The Athlon 64 FX-72 is manufactured by AMD. It was released in 2009-01-01. It is based on the Windsor (2006−2007) architecture. It features 2 cores and 2 threads. Max frequency: 2.8 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 90 nm process technology. Socket: F. Thermal design power (TDP): 125 Watt. Memory support: DDR1. Passmark benchmark score: 1,794 points. Launch price was $149.

Phenom II X3 B75

The Phenom II X3 B75 is manufactured by AMD. It was released in 2009-01-01. It is based on the Heka (2009−2010) architecture. It features 3 cores and 3 threads. Base frequency is 3 GHz, with boost up to 3 GHz. L3 cache: 6 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: 1,783 points. Launch price was $149.

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Processing Power

The Athlon 64 FX-72 packs 2 cores / 2 threads, while the Phenom II X3 B75 offers 3 cores / 3 threads — the Phenom II X3 B75 has 1 more core. Boost clocks reach 2.8 GHz on the Athlon 64 FX-72 versus 3 GHz on the Phenom II X3 B75 — a 6.9% clock advantage for the Phenom II X3 B75. The Athlon 64 FX-72 uses the Windsor (2006−2007) architecture (90 nm), while the Phenom II X3 B75 uses Heka (2009−2010) (45 nm). In PassMark, the Athlon 64 FX-72 scores 1,794 against the Phenom II X3 B75's 1,783 — a 0.6% lead for the Athlon 64 FX-72. L3 cache: 0 kB on the Athlon 64 FX-72 vs 6 MB (total) on the Phenom II X3 B75.

Feature	Athlon 64 FX-72	Phenom II X3 B75
Cores / Threads	2 / 2	3 / 3+50%
Boost Clock	2.8 GHz	3 GHz+7%
Base Clock	—	3 GHz
L3 Cache	0 kB	6 MB (total)
L2 Cache	1 MB+100%	512 kB (per core)
Process	90 nm	45 nm-50%
Architecture	Windsor (2006−2007)	Heka (2009−2010)
PassMark	1,794	1,783

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Memory & Platform

The Athlon 64 FX-72 uses the F socket (PCIe 1.1), while the Phenom II X3 B75 uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.