Athlon II X4 631 vs Pentium 4405U

Athlon II X4 631 vs Pentium 4405U Performance Spectrum

Athlon II X4 631

4 / 4

2,118

0.0%

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium 4405U

2 / 4

2,122

+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 II X4 631 vs Pentium 4405U 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 X4 631 vs Pentium 4405U: 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 X4 631

2011

Why buy it

✅Draws 100W instead of 512W, a 412W reduction.
✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.

Trade-offs

❌Lower PassMark (2,118 vs 2,122).
❌Launch MSRP is still $80 MSRP, while Pentium 4405U mostly shows up through inconsistent older-market listings.

Pentium 4405U

2015

Why buy it

✅+0.2% higher PassMark.

Trade-offs

❌412% higher power demand at 512W vs 100W.

Quick Answers

So, is Athlon II X4 631 better than Pentium 4405U?

It depends on what you want from the system. For gaming, Athlon II X4 631 is ahead with a 1.9% average FPS lead across 50 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, Pentium 4405U pulls ahead with 0.2% better PassMark.

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

For streaming, content creation, and heavier multitasking, Pentium 4405U 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?

Athlon II X4 631 is the better buy right now. Athlon II X4 631 comes in at an unclear MSRP at $80 MSRP versus unclear MSRP, and it still gives you a 1.9% average FPS lead across 50 shared CPU game tests in our data. The compromise is that Pentium 4405U is still stronger for heavier multi-core work with 0.2% better PassMark. It is also 100.0% better value on MSRP (26.5 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Pentium 4405U makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2015 vs 2011) and more multi-core headroom with 2 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.

Athlon II X4 631 vs Pentium 4405U Technical Specifications

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

Athlon II X4 631

The Athlon II X4 631 is manufactured by AMD. It was released in 2009-01-01. It is based on the Llano (2011−2012) architecture. It features 4 cores and 4 threads. Base frequency is 2.6 GHz, with boost up to 2.6 GHz. L3 cache: 0 kB. L2 cache: 1 MB (per core). Built on 32 nm process technology. Socket: FM1. Thermal design power (TDP): 100 Watt. Memory support: DDR3. Passmark benchmark score: 2,118 points. Launch price was $149.

Pentium 4405U

The Pentium 4405U is manufactured by Intel. It was released in 1 September 2015 (10 years ago). It is based on the NetBurst (2000−2006) architecture. It features 2 cores and 4 threads. Base frequency is 2.1 GHz, with boost up to 2.1 GHz. L3 cache: 2 MB. L2 cache: 512 kB. Built on 14 nm process technology. Socket: BGA1356. Thermal design power (TDP): 15 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 2,122 points. Launch price was $161.

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Processing Power

The Athlon II X4 631 packs 4 cores / 4 threads, while the Pentium 4405U offers 2 cores / 4 threads — the Athlon II X4 631 has 2 more cores. Boost clocks reach 2.6 GHz on the Athlon II X4 631 versus 2.1 GHz on the Pentium 4405U — a 21.3% clock advantage for the Athlon II X4 631 (base: 2.6 GHz vs 2.1 GHz). The Athlon II X4 631 uses the Llano (2011−2012) architecture (32 nm), while the Pentium 4405U uses NetBurst (2000−2006) (14 nm). In PassMark, the Athlon II X4 631 scores 2,118 against the Pentium 4405U's 2,122 — a 0.2% lead for the Pentium 4405U. L3 cache: 0 kB on the Athlon II X4 631 vs 2 MB on the Pentium 4405U.

Feature	Athlon II X4 631	Pentium 4405U
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	2.6 GHz+24%	2.1 GHz
Base Clock	2.6 GHz+24%	2.1 GHz
L3 Cache	0 kB	2 MB
L2 Cache	1 MB (per core)+100%	512 kB
Process	32 nm	14 nm-56%
Architecture	Llano (2011−2012)	NetBurst (2000−2006)
PassMark	2,118	2,122

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Memory & Platform

The Athlon II X4 631 uses the FM1 socket (PCIe 2.0), while the Pentium 4405U uses BGA1356 (PCIe 3.0) — making them incompatible on the same motherboard.