Athlon 64 X2 4000+ vs Sempron 3850

Athlon 64 X2 4000+ vs Sempron 3850 Performance Spectrum

Athlon 64 X2 4000+

2 / 2

1,175

+0.6%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Sempron 3850

4 / 4

1,168

0.0%

Ryzen Threadripper PRO 3955WX

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 4000+ vs Sempron 3850 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 4000+ vs Sempron 3850: 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 4000+

2006

Why buy it

✅Includes a boxed cooler (Stock Cooler), unlike Sempron 3850.

Trade-offs

❌Launch MSRP is still $328 MSRP, while Sempron 3850 mostly shows up through inconsistent older-market listings.
❌256% higher power demand at 89W vs 25W.

Sempron 3850

2014

Why buy it

✅Draws 25W instead of 89W, a 64W reduction.

Trade-offs

❌Lower PassMark (1,168 vs 1,175).
❌No boxed cooler included, unlike Athlon 64 X2 4000+.

Quick Answers

So, is Athlon 64 X2 4000+ better than Sempron 3850?

Yes. Athlon 64 X2 4000+ is the better all-around CPU here. It gives you a 0.2% average FPS lead across 46 shared CPU game tests in our data and 0.6% 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 4000+ is the better pick. According to our tests, it delivers 0.2% more average FPS across 46 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 4000+ 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?

Athlon 64 X2 4000+ is the better buy right now. Athlon 64 X2 4000+ comes in at an unclear MSRP at $328 MSRP versus unclear MSRP, and it still gives you a 0.2% average FPS lead across 46 shared CPU game tests in our data. It is also 100.0% better value on MSRP (3.6 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

Sempron 3850 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2006). That makes it the safer long-term bet.

Athlon 64 X2 4000+ vs Sempron 3850 Technical Specifications

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

Athlon 64 X2 4000+

The Athlon 64 X2 4000+ 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 GHz. L3 cache: 0 kB. L2 cache: 512K. Built on 90 nm process technology. Socket: AM2. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 1,175 points. Launch price was $149.

Sempron 3850

The Sempron 3850 is manufactured by AMD. It was released in 2007-01-01. It is based on the Kabini (2013−2014) architecture. It features 4 cores and 4 threads. Max frequency: 1.3 GHz. L2 cache: 2048 kB. Built on 28 nm process technology. Socket: AM1. Thermal design power (TDP): 25 Watt. Memory support: DDR3-1600. Passmark benchmark score: 1,168 points. Launch price was $69.

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Processing Power

The Athlon 64 X2 4000+ packs 2 cores / 2 threads, while the Sempron 3850 offers 4 cores / 4 threads — the Sempron 3850 has 2 more cores. Boost clocks reach 2 GHz on the Athlon 64 X2 4000+ versus 1.3 GHz on the Sempron 3850 — a 42.4% clock advantage for the Athlon 64 X2 4000+. The Athlon 64 X2 4000+ uses the Windsor (2006−2007) architecture (90 nm), while the Sempron 3850 uses Kabini (2013−2014) (28 nm). In PassMark, the Athlon 64 X2 4000+ scores 1,175 against the Sempron 3850's 1,168 — a 0.6% lead for the Athlon 64 X2 4000+.

Feature	Athlon 64 X2 4000+	Sempron 3850
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2 GHz+54%	1.3 GHz
L3 Cache	0 kB	—
L2 Cache	512K	2048 kB+300%
Process	90 nm	28 nm-69%
Architecture	Windsor (2006−2007)	Kabini (2013−2014)
PassMark	1,175	1,168
Geekbench 6 Single	195	—
Geekbench 6 Multi	380	—

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Memory & Platform

The Athlon 64 X2 4000+ uses the AM2 socket (PCIe 1.1), while the Sempron 3850 uses AM1 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Athlon 64 X2 4000+	Sempron 3850
Socket	AM2	AM1
PCIe Generation	PCIe 1.1	PCIe 2.0+82%
Max RAM Speed	DDR2-800	—
Max RAM Capacity	4 GB	—
RAM Channels	2	—
ECC Support	No	—
PCIe Lanes	0	—

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Advanced Features

Virtualization: AMD-V (Athlon 64 X2 4000+) / not specified (Sempron 3850). Primary use case: Athlon 64 X2 4000+ targets Legacy Desktop.