The max score actually used to be 6.9 when Vista came out. The idea is that the score is scalable. Old hardware will keep their old score, but newer hardware that are more powerful would also be able to be compared on the same system.
(*bumped to answer Ani's question RE Heatsinks*)
edit:
@ani: (sorry, missed the second part of your post), I can't seem to find much info on the cooler to come up with much of a researched opinion. If the reviews you found said it's good, and you're happy with the price too, give it a try. It'd be great if you found reviews where they compared the performance to other heat sinks. That at least will tell you how good it is.
I bought one around 2 weeks ago for 15AUD and gave it a spin. It definitely cuts out any background noise. When it should be silent, it really is so. Problem is that when it's actually trying to reproduce sound, it's completely broken. I can't even begin to describe it. It's just.... shit. From memory, the tones were out, it skipped and muffled at times, cuts out etc etc. Anything that could go wrong, it pretty much did so. The other USB sound device I looked at was the one that looked like a hub from ASUS, but I decided that didn't really need it. Plus, it's not really portable like that, since I like to use my laptop on my lap away from a desk, and it means the entire thing would be dangling off my laptop in an unsafe manner.Originally Posted by David75