A4 Micro-6400T vs Core i7-620UM

A4 Micro-6400T vs Core i7-620UM Performance Spectrum

A4 Micro-6400T

4 / 4

1,082

0.0%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Core i7-620UM

2 / 4

1,091

+0.8%

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 Core i7-620UM 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 Core i7-620UM: 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

✅Draws 5W instead of 18W, a 13W reduction.

Trade-offs

❌Lower Geekbench single-core performance for gaming (180 vs 350).
❌Lower PassMark (1,082 vs 1,091).

Core i7-620UM

2010

Why buy it

✅+94.4% higher Geekbench single-core performance for gaming and desktop responsiveness.
✅100% more PCIe lanes (16 vs 8) for storage and expansion-heavy builds.

Trade-offs

❌Launch MSRP is still $278 MSRP, while A4 Micro-6400T mostly shows up through inconsistent older-market listings.
❌260% higher power demand at 18W vs 5W.

Quick Answers

So, is Core i7-620UM better than A4 Micro-6400T?

Yes. Core i7-620UM is the better all-around CPU here. It gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data and 0.8% better PassMark, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Core i7-620UM is the better pick. According to our tests, it delivers 1.8% 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 i7-620UM is the stronger fit. You are getting 0.8% better PassMark, backed by 2 cores and 4 threads.

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

Core i7-620UM is the better buy right now. Core i7-620UM comes in at an unclear MSRP at $278 MSRP versus unclear MSRP, and it still gives you a 1.8% average FPS lead across 50 shared CPU game tests in our data. It is also 100.0% better value on MSRP (3.9 vs 0.0 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

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

A4 Micro-6400T makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2014 vs 2010). That makes it the safer long-term bet.

A4 Micro-6400T vs Core i7-620UM 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.

Core i7-620UM

The Core i7-620UM is manufactured by Intel. It was released in 7 January 2010 (15 years ago). It is based on the Arrandale (2010−2011) architecture. It features 2 cores and 4 threads. Base frequency is 1.06 GHz, with boost up to 2.13 GHz. L3 cache: 4 MB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: BGA1288. Thermal design power (TDP): 18 Watt. Memory support: DDR3-800. Passmark benchmark score: 1,091 points. Launch price was $278.

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Processing Power

The A4 Micro-6400T packs 4 cores / 4 threads, while the Core i7-620UM offers 2 cores / 4 threads — the A4 Micro-6400T has 2 more cores. Boost clocks reach 1.6 GHz on the A4 Micro-6400T versus 2.13 GHz on the Core i7-620UM — a 28.4% clock advantage for the Core i7-620UM (base: 1 GHz vs 1.06 GHz). The A4 Micro-6400T uses the Mullins (2014) architecture (28 nm), while the Core i7-620UM uses Arrandale (2010−2011) (32 nm). In PassMark, the A4 Micro-6400T scores 1,082 against the Core i7-620UM's 1,091 — a 0.8% lead for the Core i7-620UM. Geekbench 6 single-core — the metric most relevant to gaming — records 180 vs 350, a 64.2% lead for the Core i7-620UM that directly translates to higher frame rates.

Feature	A4 Micro-6400T	Core i7-620UM
Cores / Threads	4 / 4+100%	2 / 4
Boost Clock	1.6 GHz	2.13 GHz+33%
Base Clock	1 GHz	1.06 GHz+6%
L3 Cache	—	4 MB (total)
L2 Cache	2048 kB+700%	256 kB (per core)
Process	28 nm-13%	32 nm
Architecture	Mullins (2014)	Arrandale (2010−2011)
PassMark	1,082	1,091
Geekbench 6 Single	180	350+94%
Geekbench 6 Multi	—	700

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Memory & Platform

The A4 Micro-6400T uses the FT3 socket (PCIe 3.0), while the Core i7-620UM uses BGA1288 (PCIe 2.0) — making them incompatible on the same motherboard. Maximum memory speed reaches DDR3L-1333 on the A4 Micro-6400T versus DDR3-1066 on the Core i7-620UM — the A4 Micro-6400T supports 25% faster memory, which can translate to measurable gains in memory-sensitive workloads. Both support up to 8 GB of RAM. Memory channels: 1 (A4 Micro-6400T) vs 2 (Core i7-620UM). PCIe lanes: 8 (A4 Micro-6400T) vs 16 (Core i7-620UM) — the Core i7-620UM offers 8 more lanes for additional GPUs or NVMe drives.

Feature	A4 Micro-6400T	Core i7-620UM
Socket	FT3	BGA1288
PCIe Generation	PCIe 3.0+50%	PCIe 2.0
Max RAM Speed	DDR3L-1333+25%	DDR3-1066
Max RAM Capacity	8 GB	8 GB
RAM Channels	1	2+100%
ECC Support	No	No
PCIe Lanes	8	16+100%

🔧

Advanced Features

Neither processor supports overclocking. Virtualization support: AMD-V (A4 Micro-6400T) vs VT-x (Core i7-620UM). Both include integrated graphics — Radeon R3 (A4 Micro-6400T) and Intel HD Graphics (Ironlake) (Core i7-620UM) — useful as a fallback for troubleshooting or display output without a dedicated GPU. Primary use case: A4 Micro-6400T targets Tablet, Core i7-620UM targets Ultra-Portable Laptop. Direct competitor: A4 Micro-6400T rivals Atom Z3770; Core i7-620UM rivals Core 2 Duo SU9600.

Feature	A4 Micro-6400T	Core i7-620UM
Integrated GPU	Yes	Yes
IGPU Model	Radeon R3	Intel HD Graphics (Ironlake)
Unlocked	No	No
AVX-512	No	No
Virtualization	AMD-V	VT-x
Target Use	Tablet	Ultra-Portable Laptop