Hi, I have a AMD x2 4200 processor running at default settings for the processor voltage and speeds, along with SPD settings for the memory. I have an ABIT AN8 Ultra MOBO with the most current bios update installed. My problem is that while in Vista and monitoring my tempatures of Core 1 and Core 2 I see them Idle at 32C and 38C respectivly. My first question is, is this normal for the core's to be at different tempatures? Then when I run the cores at 100% usage for about 30 seconds the temps jump to 51C and 55C. I thought that tempature seemed to be a bit high considering the temp in the room is only about 71deg F. I replaced the stock cooler with a heat pipe cooler from Comp USA when they existed. It is made by "Zalman". I have tried pulling this cooler off and reapplying the thermal grease and ensured it's thin and consistant. I've also verified that the fan is running at full speed when the processor hits 45C (and verified it via monitoring programs). I'm wondering if anyone can tell me for sure if this cooler will run on a MOBO that is standing vertical (correctly) and if anyone has any suggestions as to how to lower the temps. Everything I read on here seems to lead me to believe that with stock settings I should not see much over 45C with a good cooler. I'm not positive this is a good cooler but I know I paid a lot for it!! One other thing to note is that I can touch the base of the cooler (the copper pad portion) while at 100% processor usage and it feels body temp. I'm unable to get to the processor because of the size of the base of the cooler. Also of note, i've tried to overclock this and can run the processor up to 260mhz and still not have the temps climb over 58C. Any suggestions or adivce would be very welcome. Thanks.