Core 2 Duo E6400 vs Sempron 3850

Core 2 Duo E6400 vs Sempron 3850 Performance Spectrum

Core 2 Duo E6400

2 / 2

1,175

+0.6%

1,168

0.0%

Ryzen Threadripper PRO 3955WX

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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.

Core 2 Duo E6400 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.

Core 2 Duo E6400 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.

Core 2 Duo E6400

2006

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Includes a boxed cooler (true), unlike Sempron 3850.

Trade-offs

❌Launch MSRP is still $183 MSRP, while Sempron 3850 mostly shows up through inconsistent older-market listings.
❌160% higher power demand at 65W vs 25W.

Sempron 3850

2014

Why buy it

✅Draws 25W instead of 65W, a 40W reduction.

Trade-offs

❌Lower PassMark (1,168 vs 1,175).
❌No boxed cooler included, unlike Core 2 Duo E6400.

Quick Answers

So, is Core 2 Duo E6400 better than Sempron 3850?

Yes. Core 2 Duo E6400 is the better all-around CPU here. It gives you a 0.1% average FPS lead across 49 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, Core 2 Duo E6400 is the better pick. According to our tests, it delivers 0.1% more average FPS across 49 shared CPU game tests.

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

For streaming, content creation, and heavier multitasking, Core 2 Duo E6400 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?

Core 2 Duo E6400 is the better buy right now. Core 2 Duo E6400 comes in at an unclear MSRP at $183 MSRP versus unclear MSRP, and it still gives you a 0.1% average FPS lead across 49 shared CPU game tests in our data. It is also 100.0% better value on MSRP (6.4 vs 0.0 PassMark/$), 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.

Core 2 Duo E6400 vs Sempron 3850 Technical Specifications

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

Core 2 Duo E6400

The Core 2 Duo E6400 is manufactured by Intel. It was released in 2008-01-01. It is based on the Conroe (2006−2007) architecture. It features 2 cores and 2 threads. Base frequency is 2.13 GHz, with boost up to 2.13 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: LGA775. Thermal design power (TDP): 65 Watt. Memory support: DDR1, DDR2, DDR3. Passmark benchmark score: 1,175 points. Launch price was $249.

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 Core 2 Duo E6400 packs 2 cores / 2 threads, while the Sempron 3850 offers 4 cores / 4 threads — the Sempron 3850 has 2 more cores. Boost clocks reach 2.13 GHz on the Core 2 Duo E6400 versus 1.3 GHz on the Sempron 3850 — a 48.4% clock advantage for the Core 2 Duo E6400. The Core 2 Duo E6400 uses the Conroe (2006−2007) architecture (65 nm), while the Sempron 3850 uses Kabini (2013−2014) (28 nm). In PassMark, the Core 2 Duo E6400 scores 1,175 against the Sempron 3850's 1,168 — a 0.6% lead for the Core 2 Duo E6400.

Feature	Core 2 Duo E6400	Sempron 3850
Cores / Threads	2 / 2	4 / 4+100%
Boost Clock	2.13 GHz+64%	1.3 GHz
Base Clock	2.13 GHz	—
L3 Cache	0 kB	—
L2 Cache	2 MB	2048 kB
Process	65 nm	28 nm-57%
Architecture	Conroe (2006−2007)	Kabini (2013−2014)
PassMark	1,175	1,168

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Memory & Platform

The Core 2 Duo E6400 uses the LGA775 socket (PCIe 1.1), while the Sempron 3850 uses AM1 (PCIe 2.0) — making them incompatible on the same motherboard.