Because of no optical drives, it has two heatsinks with two fans on the right and left side of the laptop. It means a million times better cooling than on normal laptops where both chips are cooled with a single fan.
I can OC it to 3.35 Ghz without problems! Or put in a i5 580M or i7 640M beast when the new BIOS comes out. From a 3.9 lbs / 1.7 kg laptop it's really impressive!
When overclocked I could get 16.7 sec wPrime 32M results. My desktop Q6600 does 18.7 sec, but it is a Quad Core! OC-ed 3dmark06 score: 9600 (someone did 10000 with a better OC-able unit).
I can confirm that on really good brightness levels, while browsing the internet, it has discharge rate of about 7000 mW, what means 9 hour battery life on the stock battery, or 12 hour on the 9 cell extended one.
And it is the first laptop I've met what has a really silent fan profile from factory. The hightest level only switches on at about 85 C degrees! And the highest level is as loud as a normal level for other laptops, for example my Thinkpad X61 was louder at 50 C.
It still has shortcomings, what needs to be addressed.
- The display still has issues, brightness fluctuations and brightness shifting.
- Not all units are OC-able, some of them use different clockgens.
If you would like to read 400 page long threads about it, here you go:
http://forum.notebookreview.com/acer/48 ... s-420.html
![Image](http://img517.imageshack.us/img517/2672/aceraspiretimelinex3820.jpg)