Athlon II X3 455 vs Phenom X4 9850B

Athlon II X3 455 vs Phenom X4 9850B Performance Spectrum

Athlon II X3 455

3 / 3

1,938

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Phenom X4 9850B

4 / 4

1,946

+0.4%

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 II X3 455 vs Phenom X4 9850B 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 II X3 455 vs Phenom X4 9850B: Pros, Cons & Final Verdict

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

Athlon II X3 455

2010

Why buy it

Trade-offs

❌Lower PassMark (1,938 vs 1,946).
❌Launch MSRP is still $88 MSRP, while Phenom X4 9850B mostly shows up through inconsistent older-market listings.

Phenom X4 9850B

2008

Why buy it

✅+0.4% higher PassMark.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Quick Answers

So, is Athlon II X3 455 better than Phenom X4 9850B?

It depends on what you want from the system. For gaming, Athlon II X3 455 is ahead with a 2.0% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Phenom X4 9850B pulls ahead with 0.4% better PassMark.

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

For streaming, content creation, and heavier multitasking, Phenom X4 9850B is the stronger fit. You are getting 0.4% better PassMark, backed by 4 cores and 4 threads.

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

Athlon II X3 455 is the better buy right now. Athlon II X3 455 comes in at an unclear MSRP at $88 MSRP versus unclear MSRP, and it still gives you a 2.0% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Phenom X4 9850B is still stronger for heavier multi-core work with 0.4% better PassMark. It is also 100.0% better value on MSRP (22.0 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Athlon II X3 455 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2010 vs 2008). That makes it the safer long-term bet.

Athlon II X3 455 vs Phenom X4 9850B Technical Specifications

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

Athlon II X3 455

The Athlon II X3 455 is manufactured by AMD. It was released in 7 December 2010 (14 years ago). It is based on the Rana (2009−2011) architecture. It features 3 cores and 3 threads. Base frequency is 3.3 GHz, with boost up to 3.3 GHz. L3 cache: 0 kB. 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: 1,938 points. Launch price was $88.

Phenom X4 9850B

The Phenom X4 9850B is manufactured by AMD. It was released in 2009-01-01. It is based on the Agena (2007−2008) architecture. It features 4 cores and 4 threads. Max frequency: 2.5 GHz. L3 cache: 2 MB (total). L2 cache: 512 kB (per core). Built on 65 nm process technology. Socket: AM2+. Thermal design power (TDP): 95 Watt. Passmark benchmark score: 1,946 points. Launch price was $149.

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Processing Power

The Athlon II X3 455 packs 3 cores / 3 threads, while the Phenom X4 9850B offers 4 cores / 4 threads — the Phenom X4 9850B has 1 more core. Boost clocks reach 3.3 GHz on the Athlon II X3 455 versus 2.5 GHz on the Phenom X4 9850B — a 27.6% clock advantage for the Athlon II X3 455. The Athlon II X3 455 uses the Rana (2009−2011) architecture (45 nm), while the Phenom X4 9850B uses Agena (2007−2008) (65 nm). In PassMark, the Athlon II X3 455 scores 1,938 against the Phenom X4 9850B's 1,946 — a 0.4% lead for the Phenom X4 9850B. L3 cache: 0 kB on the Athlon II X3 455 vs 2 MB (total) on the Phenom X4 9850B.

Feature	Athlon II X3 455	Phenom X4 9850B
Cores / Threads	3 / 3	4 / 4+33%
Boost Clock	3.3 GHz+32%	2.5 GHz
Base Clock	3.3 GHz	—
L3 Cache	0 kB	2 MB (total)
L2 Cache	512 kB (per core)	512 kB (per core)
Process	45 nm-31%	65 nm
Architecture	Rana (2009−2011)	Agena (2007−2008)
PassMark	1,938	1,946

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Memory & Platform

The Athlon II X3 455 uses the AM3 socket (PCIe 2.0), while the Phenom X4 9850B uses AM2+ (PCIe 2.0) — making them incompatible on the same motherboard.