Athlon 64 X2 5800+ vs Phenom II X4 900e

Athlon 64 X2 5800+ vs Phenom II X4 900e Performance Spectrum

Athlon 64 X2 5800+

2 / 2

1,745

+1.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Phenom II X4 900e

4 / 4

1,727

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 X2 5800+ vs Phenom II X4 900e 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 X2 5800+ vs Phenom II X4 900e: 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 X2 5800+

2008

Why buy it

✅Better for gaming: +5.2% higher average FPS across 50 shared CPU benchmark tests.

Trade-offs

❌Launch MSRP is still $230 MSRP, while Phenom II X4 900e mostly shows up through inconsistent older-market listings.
❌36.9% higher power demand at 89W vs 65W.

Phenom II X4 900e

2009

Why buy it

✅Draws 65W instead of 89W, a 24W reduction.

Trade-offs

❌Worse for gaming: lower average FPS than Athlon 64 X2 5800+ across 50 shared CPU benchmark tests.
❌Lower PassMark (1,727 vs 1,745).

Quick Answers

So, is Athlon 64 X2 5800+ better than Phenom II X4 900e?

Yes. Athlon 64 X2 5800+ is the better all-around CPU here. It gives you a 5.2% average FPS lead across 50 shared CPU game tests in our data and 1% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Athlon 64 X2 5800+ is the better pick. According to our tests, it delivers 5.2% 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, Athlon 64 X2 5800+ is the stronger fit. You are getting 1% better PassMark, backed by 2 cores and 2 threads.

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

Athlon 64 X2 5800+ is the better buy right now. Athlon 64 X2 5800+ comes in at an unclear MSRP at $230 MSRP versus unclear MSRP, and it still gives you a 5.2% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (7.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Phenom II X4 900e makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2009 vs 2008). That makes it the safer long-term bet.

Athlon 64 X2 5800+ vs Phenom II X4 900e Technical Specifications

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

Athlon 64 X2 5800+

The Athlon 64 X2 5800+ is manufactured by AMD. It was released in 2009-01-01. It is based on the Brisbane (2007−2008) architecture. It features 2 cores and 2 threads. Max frequency: 3 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 65 nm process technology. Socket: AM2. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 1,745 points. Launch price was $149.

Phenom II X4 900e

The Phenom II X4 900e is manufactured by AMD. It was released in 2009-01-01. It is based on the Deneb (2009−2011) architecture. It features 4 cores and 4 threads. Base frequency is 2.4 GHz, with boost up to 2.4 GHz. L3 cache: 6 MB (total). L2 cache: 512 kB (per core). Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 65 Watt. Memory support: DDR3. Passmark benchmark score: 1,727 points. Launch price was $149.

⚡

Processing Power

The Athlon 64 X2 5800+ packs 2 cores / 2 threads, while the Phenom II X4 900e offers 4 cores / 4 threads — the Phenom II X4 900e has 2 more cores. Boost clocks reach 3 GHz on the Athlon 64 X2 5800+ versus 2.4 GHz on the Phenom II X4 900e — a 22.2% clock advantage for the Athlon 64 X2 5800+. The Athlon 64 X2 5800+ uses the Brisbane (2007−2008) architecture (65 nm), while the Phenom II X4 900e uses Deneb (2009−2011) (45 nm). In PassMark, the Athlon 64 X2 5800+ scores 1,745 against the Phenom II X4 900e's 1,727 — a 1% lead for the Athlon 64 X2 5800+. L3 cache: 0 kB on the Athlon 64 X2 5800+ vs 6 MB (total) on the Phenom II X4 900e.

Feature	Athlon 64 X2 5800+	Phenom II X4 900e
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	3 GHz+25%	2.4 GHz
Base Clock	—	2.4 GHz
L3 Cache	0 kB	6 MB (total)
L2 Cache	512 kB	512 kB (per core)
Process	65 nm	45 nm-31%
Architecture	Brisbane (2007−2008)	Deneb (2009−2011)
PassMark	1,745+1%	1,727

🧠

Memory & Platform

The Athlon 64 X2 5800+ uses the AM2 socket (PCIe 2.0), while the Phenom II X4 900e uses AM3 (PCIe 2.0) — making them incompatible on the same motherboard.