I've just build my new computer some days ago and am having some problems since then and don't know what to do.
First, the processor (it's a 2600k) seems to overheat a lot. It stays around 45~47°c in idle and goes up to 85+°C under full load (video encoding, intel extreme tuning stress test, prime95, etc.) Ambient temperature at ~25°c. This is at stock clocks with a stock heatsink and fan, which stays around 2000~3000 rpm. I've tried everything: Reseated the heatsink in all four possible positions making sure that I heared the two "cliks" when pressing the push pins, all types of thermal compound (applying varying amounts on processor and heatsink) and so on. The heatsink is always firmly in place, as I can't even tilt it, and, when removing the heatsink, the termal compound is squashed, meaning that there was pressure applied. What's more strange: even with the heatsink firmly in place, untiltable, I can keep my hand on it even when the processor is at 85°c! There's no way it would remain cool with the pressure that is applied on it, if the temperature readings are correct.
What's strange is that not only the processor readings seem wrong, the motherboad ones seem too. Mainly because Tcase always seem to be 10°C or more higher than Tjunction and, by everything I know about thermodynamics, it's impossible, since the heat is generated at the cores, how could the package be hotter? There are also some strange alarms in Intel Desktop Utilities that happened two times in about a week saying that the memory voltages had gone over 1.9v! This seems only a spike, because upon checking on any monitoring utility, the voltages are back at 1.5 and nothing is registered. But I'm afraid it could damage the processor or the memories.
It doesn't seem like a PSU (Sapphire 625W) problem because the very same lines must be used for generating other voltages and only the memory voltages showed an alarm (and only two times.) Also, some motherboard sensors sometimes stop working. Some temperatures and fan rpms will start showing up as 0 until I reboot. Maybe my motherboard AND processor are defective?
I'm using the latest BIOS and latest drivers/programs. Even if these are only mistakes on the sensors, wrong readings could cause wrong throttles and lower my performance, not acceptable. :/
Thank you for reading through such a long post, I hope this is solvable without an RMA.