Hey there, my computer has begun beeping when under load on occaision, they are different lengths, but the same pitch, and can often after a while become quite continuous. it first started whilst rendering in Maya - a 3d modelling/animation program i use for uni, however i have found it also happening when i use a video converter, or when virus scanning starts whilst playing games, eg Wow. I originally thought it could be the video card overheating and then beeping to tell me, however after it began happening whilst virus scanning i began to think it could be the motherboard or CPU's? I have dual core intel 6600 i believe, an Nvidia 7950GX2 card. I have monitored the heat values of resting/active whilst playing games using speedfan, vidcard core 1 sits around 70 whilst resting, core2 around 66, both rising around 9 degrees when playing to 79 and 75. there is then temp1 temp2 and temp3 and then core0 and core 1. temp1 = 41 temp2 = 39 (these two changes under load, up over 50) temp3 = -2??? core0 sits around 52, core1 also 52 resting, however when under load i saw them go over 70, which seemed to coincide with a small amount of beeping, i could be wrong though... does anyone have suggestions as to what this could be?? i've opened the case and left a house fan blowing in, to try to keep it uber cool, but i've found it can still happen, however im not sure if it would have any real effect? any help would be very very appreciated! see attached screenshots of rest and load. when under load it started beeping with core temps up around 74 and 75, i also noticed the -5V changes alot for some reason between load and rest... i read somewhere this could be a PSU problem? thanks again, sorry for the lengthy post!!!!