A4 Micro-6400T vs Pentium 3556U

A4 Micro-6400T vs Pentium 3556U Performance Spectrum

A4 Micro-6400T

4 / 4

1,082

+0.9%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Pentium 3556U

2 / 2

1,072

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.

A4 Micro-6400T vs Pentium 3556U 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.

A4 Micro-6400T vs Pentium 3556U: Pros, Cons & Final Verdict

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

A4 Micro-6400T

2014

Why buy it

✅+0.9% higher PassMark.
✅Draws 5W instead of 512W, a 507W reduction.
✅100+% more PCIe lanes (8 vs 0) for storage and expansion-heavy builds.
✅Integrated graphics onboard with Radeon R3, while Pentium 3556U needs a discrete GPU.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Pentium 3556U

2013

Why buy it

Trade-offs

❌Lower PassMark (1,072 vs 1,082).
❌10140% higher power demand at 512W vs 5W.
❌No integrated graphics, while A4 Micro-6400T can still boot and troubleshoot without a discrete GPU.

Quick Answers

So, is A4 Micro-6400T better than Pentium 3556U?

It depends on what you want from the system. For gaming, Pentium 3556U is ahead with a 1.6% average FPS lead across 48 shared CPU game tests in our data. For rendering, compiling, streaming, and heavier multitasking, A4 Micro-6400T pulls ahead with 0.9% better PassMark.

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

For streaming, content creation, and heavier multitasking, A4 Micro-6400T is the stronger fit. You are getting 0.9% better PassMark, backed by 4 cores and 4 threads.

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

A4 Micro-6400T still makes the most sense overall. A4 Micro-6400T comes in at an unclear MSRP at unclear MSRP versus unclear MSRP, and it still gives you 0.9% better PassMark.

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

A4 Micro-6400T makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2013) and more multi-core headroom with 4 cores / 4 threads instead of 2/2. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

A4 Micro-6400T vs Pentium 3556U Technical Specifications

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

A4 Micro-6400T

The A4 Micro-6400T is manufactured by AMD. It was released in 29 April 2014 (11 years ago). It is based on the Mullins (2014) architecture. It features 4 cores and 4 threads. Base frequency is 1 GHz, with boost up to 1.6 GHz. L2 cache: 2048 kB. Built on 28 nm process technology. Socket: FT3. Thermal design power (TDP): 5 Watt. Memory support: DDR3-1333. Passmark benchmark score: 1,082 points. Launch price was $69.

Pentium 3556U

The Pentium 3556U is manufactured by Intel. It was released in 2007-01-01. It is based on the Haswell (2013−2015) architecture. It features 2 cores and 2 threads. Base frequency is 1.7 GHz, with boost up to 1.7 GHz. L3 cache: 2 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: FCBGA1168. Thermal design power (TDP): 15 Watt. Memory support: DDR3. Passmark benchmark score: 1,072 points. Launch price was $69.

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Processing Power

The A4 Micro-6400T packs 4 cores / 4 threads, while the Pentium 3556U offers 2 cores / 2 threads — the A4 Micro-6400T has 2 more cores. Boost clocks reach 1.6 GHz on the A4 Micro-6400T versus 1.7 GHz on the Pentium 3556U — a 6.1% clock advantage for the Pentium 3556U (base: 1 GHz vs 1.7 GHz). The A4 Micro-6400T uses the Mullins (2014) architecture (28 nm), while the Pentium 3556U uses Haswell (2013−2015) (22 nm). In PassMark, the A4 Micro-6400T scores 1,082 against the Pentium 3556U's 1,072 — a 0.9% lead for the A4 Micro-6400T.

Feature	A4 Micro-6400T	Pentium 3556U
Cores / Threads	4 / 4+100%	2 / 2
Boost Clock	1.6 GHz	1.7 GHz+6%
Base Clock	1 GHz	1.7 GHz+70%
L3 Cache	—	2 MB (total)
L2 Cache	2048 kB+700%	256K (per core)
Process	28 nm	22 nm-21%
Architecture	Mullins (2014)	Haswell (2013−2015)
PassMark	1,082	1,072
Geekbench 6 Single	180	—

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Memory & Platform

The A4 Micro-6400T uses the FT3 socket (PCIe 3.0), while the Pentium 3556U uses FCBGA1168 (PCIe 3.0) — making them incompatible on the same motherboard.

Feature	A4 Micro-6400T	Pentium 3556U
Socket	FT3	FCBGA1168
PCIe Generation	PCIe 3.0	PCIe 3.0
Max RAM Speed	DDR3L-1333	—
Max RAM Capacity	8 GB	—
RAM Channels	1	—
ECC Support	No	—
PCIe Lanes	8	—

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Advanced Features

Virtualization: AMD-V (A4 Micro-6400T) / not specified (Pentium 3556U). The A4 Micro-6400T includes integrated graphics (Radeon R3), while the Pentium 3556U requires a dedicated GPU. Primary use case: A4 Micro-6400T targets Tablet. Direct competitor: A4 Micro-6400T rivals Atom Z3770.