Hi all, can anyone offer any advice on the following, before I start throwing money at it (which I dont have)... System Spec: Win Vista 64 4gb OCZ ram Enermax 850 psu Intel Q6600 cpu Nvidia Geforce GTX 280 (x2 sli) Striker II extreme mobo Whole system water cooled Over the past few weeks my pc has being playing beggers, it has been locking up and the screen has been going funny colours, sometimes green and blue little squares sometimes pink and blue. Other times the system will lock up with a solid pink or red or green screen ? Happens more when booting up system, usually takes about 5 attempts before i get into windows, but system will crash when playing games, looking at pictures. I have tried changing the ram - taking the ram out - no effect (although changing the page size made it a little more stable ??) I have removed gpu to single (from sli) and changed the monitor connection - no change, still locks up. Can boot into safe mode with no problems and no issues show up and unfortunately i dont have any spare parts to swop or another system to try my parts in... Have tried to upload screen shots of the problem but it wont let me... I cant make my mind up what the problem is...can any one help? Please let me know if you need any more info..