Hello, I have built my own PC and i'm pretty good with computers myself. However lately i've been experiencing a problem and its been running great until a few weeks ago. I have made no hardware changes since then except adding 4GB RAM. My computer has frozen 5 or 6 times since then. I'm not sure if its heat, or what really, but heat is my best guess since i noticed some of my tempatures are unusally higher than what they were. I have an Intel i7 930 2.8GHz not OC! With Elitegroup X58B-A2 motherboard under the hood and an 850 Watt Power supply with Nvidia Geforce 295 GTX MFG by Gigabyte. Currently have 8GB PNY DDR3 1333 RAM (4x2GB) equipped with a case fan extra only. The case fan runs at a lil less than 1,000 RPMs which i'd like to jack up. CPUID Hardware Monitor is what i use to check my tempatures. my CPU cores run between 55-70 degrees Celsuis idle now, why i'm not sure? My GPU core will run from 60 to 70 celsuis, i've never seen it over 70, as by the time it's 70 i experience a freeze. Possibly a GPU temp high? However i have read up that 70 is fine for this card to handle. My best estimation is my Memory overheating, however i have ran multiple memory tests and they experience no errors. and I have done some CPU benchmarking/stress testing and i've seen my CPU reach 88 degrees and still run fine. Why? I dunno because 88 is very high so my CPU is high yes, but not enough to cause a freeze. Now i've played music while freezing to see how it reacts, its an instant sound replay of maybe 0.2 seconds of sound dinging at me lol. my numlock doesn't react or my mouse, ctrl+alt+delx2 will not reboot PC. Keyboard totally unresponsive during a freeze. Never had a BSOD though! I play World of Warcraft, btw. When i play it for an hour or 2 i'll freeze, but earlier today i froze just booting up so i'm thinking theres a problem. I've checked my system for viruses and whatnot, nothing. My hard drive is not even close to full. I have a very nice system i should not be exerincing these freezes. It happened ever since i got 2 new sticks of PNY RAM. I have them placed in the first 4 slots of my MB, they do get hot i must say, i've taken my case off and touched them yeah they are deffinitely hot. My system gets air dusted out once a month at the least. S it's not dusty at all very clean. I can provide any screenshots or pictures of my computer you like, just give me some advice here, i've done everything i know and still puzzled.