Athlon II X2 260u vs Core 2 Duo T9400

Athlon II X2 260u vs Core 2 Duo T9400 Performance Spectrum

Athlon II X2 260u

2 / 2

990

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Core 2 Duo T9400

2 / 2

1,004

+1.4%

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 X2 260u vs Core 2 Duo T9400 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 X2 260u vs Core 2 Duo T9400: 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 X2 260u

2009

Why buy it

✅Includes a boxed cooler (true), unlike Core 2 Duo T9400.

Trade-offs

❌Lower PassMark (990 vs 1,004).
❌Launch MSRP is still $60 MSRP, while Core 2 Duo T9400 mostly shows up through inconsistent older-market listings.
❌316.7% higher power demand at 25W vs 6W.

Core 2 Duo T9400

2008

Why buy it

✅Draws 6W instead of 25W, a 19W reduction.

Trade-offs

❌No boxed cooler included, unlike Athlon II X2 260u.

Quick Answers

So, is Core 2 Duo T9400 better than Athlon II X2 260u?

Yes. Core 2 Duo T9400 is the better all-around CPU here. It gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data and 1.4% 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 T9400 is the better pick. According to our tests, it delivers 1.6% 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, Core 2 Duo T9400 is the stronger fit. You are getting 1.4% better PassMark, backed by 2 cores and 2 threads.

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

Core 2 Duo T9400 is still the much better call for a fresh build. Core 2 Duo T9400 comes in at an unclear MSRP at unclear MSRP versus $60 MSRP, and it still gives you a 1.6% average FPS lead across 50 shared CPU game tests in our data. Athlon II X2 260u only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2009 platform. Even with 100.0% better value on paper (16.5 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on AM3.

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

Athlon II X2 260u 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 II X2 260u vs Core 2 Duo T9400 Technical Specifications

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

Athlon II X2 260u

The Athlon II X2 260u is manufactured by AMD. It was released in 20 October 2009 (16 years ago). It is based on the Regor (2009−2013) architecture. It features 2 cores and 2 threads. Max frequency: 1.8 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 45 nm process technology. Socket: AM3. Thermal design power (TDP): 25 Watt. Memory support: DDR3. Passmark benchmark score: 990 points. Launch price was $83.

Core 2 Duo T9400

The Core 2 Duo T9400 is manufactured by Intel. It was released in 15 July 2008 (17 years ago). It is based on the Penryn (2008−2011) architecture. It features 2 cores and 2 threads. Base frequency is 2.53 GHz, with boost up to 2.53 GHz. L3 cache: 6 MB L2 Cache. L2 cache: 6 MB. Built on 45 nm process technology. Socket: PGA478. Thermal design power (TDP): 35 Watt. Passmark benchmark score: 1,004 points. Launch price was $316.

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Processing Power

Both the Athlon II X2 260u and Core 2 Duo T9400 share an identical 2-core/2-thread configuration. Boost clocks reach 1.8 GHz on the Athlon II X2 260u versus 2.53 GHz on the Core 2 Duo T9400 — a 33.7% clock advantage for the Core 2 Duo T9400. The Athlon II X2 260u uses the Regor (2009−2013) architecture (45 nm), while the Core 2 Duo T9400 uses Penryn (2008−2011) (45 nm). In PassMark, the Athlon II X2 260u scores 990 against the Core 2 Duo T9400's 1,004 — a 1.4% lead for the Core 2 Duo T9400. L3 cache: 0 kB on the Athlon II X2 260u vs 6 MB L2 Cache on the Core 2 Duo T9400.

Feature	Athlon II X2 260u	Core 2 Duo T9400
Cores / Threads	2 / 2	2 / 2
Boost Clock	1.8 GHz	2.53 GHz+41%
Base Clock	—	2.53 GHz
L3 Cache	0 kB	6 MB L2 Cache
L2 Cache	1 MB	6 MB+500%
Process	45 nm	45 nm
Architecture	Regor (2009−2013)	Penryn (2008−2011)
PassMark	990	1,004+1%
Geekbench 6 Single	—	320

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Memory & Platform

The Athlon II X2 260u uses the AM3 socket (PCIe 2.0), while the Core 2 Duo T9400 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches 1333 on the Athlon II X2 260u versus DDR3-1066 on the Core 2 Duo T9400 — the Athlon II X2 260u supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both feature 2-channel memory with ECC support. Chipset compatibility: AM2+,AM3 (Athlon II X2 260u) and GM45,PM45 (Core 2 Duo T9400).

Feature	Athlon II X2 260u	Core 2 Duo T9400
Socket	AM3	PGA478
PCIe Generation	PCIe 2.0+82%	PCIe 1.1
Max RAM Speed	1333+25%	DDR3-1066
Max RAM Capacity	16	—
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	0	—

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Advanced Features

Neither processor supports overclocking. Virtualization support: true (Athlon II X2 260u) vs VT-x (Core 2 Duo T9400). Primary use case: Core 2 Duo T9400 targets Budget. Direct competitor: Athlon II X2 260u rivals Core 2 Duo SU9400; Core 2 Duo T9400 rivals Athlon Silver 3050U.