A6-6400B vs Core 2 Duo T5600

A6-6400B vs Core 2 Duo T5600 Performance Spectrum

A6-6400B

2 / 2

1,573

+0.8%

Ryzen Threadripper PRO 5945WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Core 2 Duo T5600

2 / 2

1,560

0.0%

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.

A6-6400B vs Core 2 Duo T5600 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.

A6-6400B vs Core 2 Duo T5600: Pros, Cons & Final Verdict

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

A6-6400B

2013

Why buy it

✅100+% more PCIe lanes (16 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Radeon HD 8470D, while Core 2 Duo T5600 needs a discrete GPU.
✅Includes a boxed cooler (true), unlike Core 2 Duo T5600.

Trade-offs

❌3150% higher power demand at 65W vs 2W.

Core 2 Duo T5600

2006

Why buy it

✅Draws 2W instead of 65W, a 63W reduction.

Trade-offs

❌Lower PassMark (1,560 vs 1,573).
❌Launch MSRP is still $241 MSRP, while A6-6400B mostly shows up through inconsistent older-market listings.
❌No integrated graphics, while A6-6400B can still boot and troubleshoot without a discrete GPU.
❌No boxed cooler included, unlike A6-6400B.

Quick Answers

So, is A6-6400B better than Core 2 Duo T5600?

Yes. A6-6400B is the better all-around CPU here. It gives you a 1.1% average FPS lead across 50 shared CPU game tests in our data, 0.8% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, A6-6400B is the better pick. According to our tests, it delivers 1.1% 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, A6-6400B is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 2 threads.

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

A6-6400B is still the much better call for a fresh build. A6-6400B comes in at an unclear MSRP at unclear MSRP versus $241 MSRP, and it still gives you a 1.1% average FPS lead across 50 shared CPU game tests in our data. Core 2 Duo T5600 only looks stronger on raw value math because it is extremely cheap, but that usually means used-market pricing on an obsolete 2006 platform. Even with 100.0% better value on paper (6.5 vs 0.0 PassMark/$), it really only makes sense as a cheap stopgap or a niche existing-platform option for someone already on PGA478.

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

A6-6400B makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2013 vs 2006) and more multi-core headroom with 2 cores / 2 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A6-6400B vs Core 2 Duo T5600 Technical Specifications

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

A6-6400B

The A6-6400B is manufactured by AMD. It was released in 2014-01-01. It is based on the Richland (2013−2014) architecture. It features 2 cores and 2 threads. Base frequency is 3.9 GHz, with boost up to 4.1 GHz. L2 cache: 1 MB (total). Built on 32 nm process technology. Socket: FM2. Thermal design power (TDP): 65 Watt. Memory support: DDR3-1866. Passmark benchmark score: 1,573 points. Launch price was $70.

Core 2 Duo T5600

The Core 2 Duo T5600 is manufactured by Intel. It was released in 28 July 2006 (19 years ago). It is based on the Merom (2006−2008) architecture. It features 2 cores and 2 threads. Base frequency is 1.83 GHz, with boost up to 1.83 GHz. L3 cache: 0 kB. L2 cache: 2 MB. Built on 65 nm process technology. Socket: PGA478. Thermal design power (TDP): 34 Watt. Passmark benchmark score: 1,560 points. Launch price was $241.

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Processing Power

Both the A6-6400B and Core 2 Duo T5600 share an identical 2-core/2-thread configuration. Boost clocks reach 4.1 GHz on the A6-6400B versus 1.83 GHz on the Core 2 Duo T5600 — a 76.6% clock advantage for the A6-6400B (base: 3.9 GHz vs 1.83 GHz). The A6-6400B uses the Richland (2013−2014) architecture (32 nm), while the Core 2 Duo T5600 uses Merom (2006−2008) (65 nm). In PassMark, the A6-6400B scores 1,573 against the Core 2 Duo T5600's 1,560 — a 0.8% lead for the A6-6400B.

Feature	A6-6400B	Core 2 Duo T5600
Cores / Threads	2 / 2	2 / 2
Boost Clock	4.1 GHz+124%	1.83 GHz
Base Clock	3.9 GHz+113%	1.83 GHz
L3 Cache	—	0 kB
L2 Cache	1 MB (total)	2 MB+100%
Process	32 nm-51%	65 nm
Architecture	Richland (2013−2014)	Merom (2006−2008)
PassMark	1,573	1,560

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Memory & Platform

The A6-6400B uses the FM2 socket (PCIe 3.0), while the Core 2 Duo T5600 uses PGA478 (PCIe 1.1) — making them incompatible on the same motherboard. Maximum memory speed reaches 1866 on the A6-6400B versus DDR2-667 on the Core 2 Duo T5600 — the A6-6400B supports 179.8% faster memory, which can translate to measurable gains in memory-sensitive workloads. The A6-6400B supports up to 32 GB of RAM compared to 4 GB — 700% more capacity for professional workloads. Both feature 2-channel memory with ECC support. PCIe lanes: 16 (A6-6400B) vs 0 (Core 2 Duo T5600) — the A6-6400B offers 16 more lanes for additional GPUs or NVMe drives. Chipset compatibility: FM2 (A6-6400B) and 945GM,945PM (Core 2 Duo T5600).

Feature	A6-6400B	Core 2 Duo T5600
Socket	FM2	PGA478
PCIe Generation	PCIe 3.0+173%	PCIe 1.1
Max RAM Speed	1866+180%	DDR2-667
Max RAM Capacity	32 GB+700%	4 GB
RAM Channels	2	2
ECC Support	No	No
PCIe Lanes	16	0

🔧

Advanced Features

Virtualization: true (A6-6400B) / not specified (Core 2 Duo T5600). The A6-6400B includes integrated graphics (Radeon HD 8470D), while the Core 2 Duo T5600 requires a dedicated GPU. Direct competitor: A6-6400B rivals Pentium G3220.