I just started experiencing constant freezing on my desktop. The only thing im running is a IE8 or Firefox with a few tabs open. Freezes up every minute or so and lasts for 30+ seconds and then starts working again. One thing I noticed is when the freezing occurs there is no sound from my computer. As soon as the freezing goes away I can hear my computer working again. Kind of like the loading/crunching sound a computer makes sometimes. Things I have done/checked: Dusted with air can CPU and Power fan working deleted some old files and programs Im thinking part of my RAM is going bad but im not sure. NOTE: Just replaced broken video card with a cheaper card that has no fan. This may sound like a dumb question but could the freezing be becaus the card is overheating? Do I need to install an external fan for the card?