Technology Forum

I made a thread in a different forum before, but it got closed for some reason, so here I go again.Basically, roughly a year ago, I bought some new parts and combined them with some parts of my old PC, and all was fine, it worked as it was supposed to, until 3 or 4 months ago, when I started having crashes that crashed the entire PC in certain games. At first I thought it was just that game, so I didn't worry about it, till it happend with games I knew were stable.The crashes at the time, were System freeze, the screen in the game would freeze completely, and the sound that was playing would loop endlessly, the only way to fix it was to reboot. It would do this pretty much everyday at least once, but the times at which it happend were completely random, sometimes after 5 hours, sometimes after 3, sometimes after 12, sometimes, very rarely, it didn't happen that day, but it does only seem to happen in games, and only after long periods of playing.I tried all the obvious fixes, but nothing helped at all. The only thing that has helped was removing one of the memory sticks out and then trying it, and this does seem to work, I have again played these games for over a month without a single crash happening, so originally I thought "must be the ram" and bought some corsair RAM, but it happens with those as well.Now honestly at the moment i'm playing a MMO so I can't really do much checking in what it is, but at some point I do would like to know what it actually is so I can replace the part, and play with my 2gb ram again, instead of just 1gb.my System:Windows XP600 watt Zalman PSUAsus P5N-E SLI MBXFX 8800 320 GTS2GB RAM, Buffalo Intel C2D 6600Nothing is overclocked, never was, and like I said this setup worked without a single problem for over 9 months, so where would these problems suddenly come from? Why would these issues only show when I use both memory sticks at the same time? Is it the Motherboard?Any help, greatly appreciated.