im also looking to get one of these and your temps are impressive. im not a gamer so i will not be putting the cpu under alot of load but i want a quieter cooler.
how have you applied your thermal paste on the cpu?
i know everyone has their preferred way but with your temps i wanted to know how you applied it.
A note about temps: There is no consensus about which programs give accurate (or even semi-accurate) readings for the E8400. I've used many, including Core Temp and Real Temp, which show an exact 10 degree disparity between them. In the end I chose Real Temp because it corresponds most closely to the temps reported by the BIOS. However, that is exactly 10C less than the readings returned by Core Temp, so in my pursuit of an over clock I've kept the +10C figure in my head, to make sure I don't stray into hardware frying territory.
There was a good little piece on a review site about different methods of applying thermal material to the Xigmatech. Unfortunately, I cannot locate it (the site also did a review of the heat sink, but Google is not my friend tonight), but the writer tried several different methods using AS5, then pulled the sink and took photos of the result. One of the things he pointed out is that following the AS5 directions may not work because of the slim notch between the sides of heat pipes and the aluminum "holder".
The best method according to his trial and error was to pre-apply a tiny amount of AS5 (or other TIM) in those areas where the pipes and the metal meet, essentially filling them in, then wiping any excess clean with something flat and stiff, like a plastic card. Then apply a very thin, short line at the center of each heat pipe and install it carefully on the CPU, trying not to slide it around too much.
The result is very close to the photos AS5 has in their directions - a thin, even layer of TIM on the sink and CPU heat spreader.
I likely used a little too much, I'm betting, and possibly could do better and perhaps squeeze a degree or two, but I'm holding off changing it until my fan controller arrives and I pull my entire rig apart and re-install it to the case to better accommodate slower fans, a new passive sinked graphics card, and the less than tidy jumble of cables.
When I do that I'll pull the sink and see how the TIM actually spread.
Regardless of the actual readings I'm getting (be it really 31C or 41C idle), the impressive thing is the decently low temp rise from idle to full load. If the BIOS and Real Temp are both wrong and Core Temp right, then I'm still looking at 55C maximum at full load on a 20% over clock, with a pretty quiet heat sink that is light, and can be made quieter.
Since you are not a gamer, this sink could work very well for you, depending upon your CPU (though I think it can handle most anything competently), case, choice of fan if you go with something other than stock, and airflow.
Do be sure to measure ahead of time - I've read of some folks having problems in some cases, usually those that have a side fan across from the CPU.