Hey all, it's been a while since I've posted here, but I could use some help figuring this out. A few days ago I noticed my CPU (machine in sig) was suddenly running a bit warmer; I'm not certain of the numbers but if I recall correctly they went from low to mid 30's at idle and 40-50's under load, to high 30's idle and 60-70's under load. I figured it had been a while since I re-seated my heatsink so I reached for a new-ish tube of IC diamond. I put down an application (with great diffuculty, that stuff is hard to apply) and booted up. To my horror my boot-up/load temps rose into the high 90's, and the CPU began to throttle. I immediately assumed a bad mount because of how hard it was to manipulate the IC diamond. I pulled the heatsink off, grabbed a ~6 year old tube of AS Ceramique, painted both contact plates to a mirror like surface, and re-mounted. I booted up to the same 90+ load temps. 2-3 more attempts with the ceramique and I was seeing little if any improvement. At this point I knew something else must be wrong, but to be certain I grabbed a new-ish tube of AS5 and mounted one more time, no change. Now that I have ranted a bit about having to re-mount my heatsink half a dozen times, here's the details of my cooling system. I'm using a Tuniq Tower-120 from 7-8 years back with a modified retention plate, if you aren't familiar with this cooler, here's a link: http://www.bit-tech.net/hardware/cooling/2007/11/01/tunic_tower_120/1 Since purchasing it, I've replaced the fan with some high-power scythe fan that has not trouble moving air through the dense cooler, it also sit's in the prime location for air exhaust in my case, with two 120 mm exhaust fans above it, and one behind it, matching airflow with the heatsink fan. So airflow is excellent. My CPU is one of the 4.5Ghz 2500k's that were so popular a few years back, the core voltage top's out at just over 1.4v according to software readings, I don't recall the exact setting I have in bios, but that should be pretty close. I honestly have no idea what the normal voltage people use at these speeds is, though I always feel like I'm running a bit high. While idling my CPU clocks down to 1.6 Ghz and about 1.0v core voltage, temperatures tend to rest in the high 30's right now. So, with all that said, I would like some help sorting out what could be causing these super high temp's all of a sudden, I have a few idea's myself but I would like to hear some outside opinions on the matter. Let me know what you're thinking, I'd really like to understand the cause of the problem, even if the solution just ends up being a new heatsink. Thanks in advance for your help, and sorry for the long post, I just like to be thorough, but I end up being long-winded.