Acer Aspire M5-581TG-6666
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Average of 4 scores (from 4 reviews)
Reviews for the Acer Aspire M5-581TG-6666
Source: Techspot

When I first fired up the TimelineU, I had a hard time determining whether I should review the machine objectively as a standalone product or if I should impart my preconceived notions about ultrabooks. In the interest of fairness, I'll try to cover both starting with the latter: As an ultrabook, the M5 falls short.
Single Review, online available, Medium, Date: 08/14/2012
Rating: Total score: 70%
Source: Techreview Source

The Acer Timeline Ultra M5 is yet another Ultrabook on the scene. This one offers an attractive design, great audio, an optical drive and discrete graphics. It does lack in screen resolution and overall performance, which holds this computer back from the rest of the pack.
Comparison, online available, Very Short, Date: 07/26/2012
Rating: Total score: 80%
Source: PC World

The Timeline Ultra M5 runs on a newer but weaker processor than the M3 used, and Acer pulled the older model's speedy 256GB SSD in favor of a 500GB HDD with a 20GB SSD boot drive. The result is slower overall performance, which is reflected in the 50-point difference in the systems' WB7 scores.
Comparison, online available, Short, Date: 07/24/2012
Rating: Total score: 80%
Source: Laptop Mag

With most 15.6-inch notebooks, you're forced to lug around a bulky, heavy device, sacrificing thickness for power. The $829 Acer Aspire TimelineU M5-581TG-6666 is a happy compromise, stuffing a slim 0.81-inch chassis with an Ivy Bridge CPU, discrete Nvidia graphics, and more than 7 hours of battery life, which will delight mobile gamers and multimedia consumers everywhere.
Single Review, online available, Long, Date: 07/19/2012
Rating: Total score: 70%
Comment
NVIDIA GeForce GT 640M LE: A Slower-clocked version of the GT 640M
Modern games should be playable with these graphics cards at low settings and resolutions. Casual gamers may be happy with these cards.
» Further information can be found in our Comparison of Mobile Graphics Cards and the corresponding Benchmark List.
3317U: Ivy-Bridge-based ULV-CPU in Q2 2012. Offers a core clock of 1.7 - 2.6 GHz and an HD 4000 GPU (350 - 1050 MHz). The TDP is rated at 17 W.» Further information can be found in our Comparison of Mobile Processsors.