Hi all, been a while since I've posted here, but I have a problem and some questions. The problem is this: I took apart my computer last night to clean everything out. I bought compressed air cans to blow all the dust out and took every little part out of it's place and put it on the floor. I take pictures when I do this before I take everything out, so I can compare before and after. Well, I put it all back together and after a few quick fixes (like forgetting to plug in the CPU fan, and forgetting to plug in the data cables for my 2 SATA HDD's), I got it back up and running. Now, for some reason, my computer will stay on for about 15-20 minutes before going to a blue screen, doing a memory dump, and then restarting. I did a memory check and that's working all right. Nothing else is improperly placed (I compared with the pictures, to be 100% sure). All I added was a new fan in the front, for a total of 5. I know I have enough power to run them all, I have a 500 W PSU. Can anyone think of a reason why this would happen? Ok, now for the questions. My CPU is the AMD Athlon 64 X2 6000+, is supposed to run at 3.0 GHz, dual core. When I open CPUz, a hardware monitoring program, it only lets me look at one core and says that it's running at 1000MHz with a 5x multiplier (bus speed is 200MHz). Sometimes the multiplier jumps to 15x, bringing the total core clock speed up to 3000MHz, but most times it's at 5x. Now I know very little about overclocking, so what I need to know is if I go into BIOS setup and "overclock" the CPU to have a bus speed of 250MHz and a multiplier of 12x (or 200MHz with a 15x), which will be 3000MHz, will that potentially ruin the CPU? I am uing the stock fan, which is actually really powerful for being stock, and I've never had problems with it. Windows reports that my CPU is running at 3.0GHz, but CPUz doesn't, and I'm leaning toward trusting CPUz. I'd like to get my money's worth for this CPU, but I'm not sure if what I'm trying to do will ruin it. It's supposed to be rated at 3.0 GHz (per core?) but it's most definately not running that. Also, my RAM. I have currently 4x1GB, 2 of them are running at DDR2 5300 (667MHz) and the other 2 are running DDR2 6400 (800MHz). Would overclocking the memory to run at 800MHz for all 4 affect the computer? Meaning would that cause it to malfunction, because I changed it back (I had it on 800MHz) and it hasn't shut down yet (knock on wood). This isn't a HUGE issue because I'm getting 4x2GB RAM today, I ordered off Newegg. They are all the exact same and are all running at 800MHz, and I don't think I'll overclock. Anyways, I would appreciate some help with all this, even the memory question, it might help in the future. Thank you in advance.