Can anyone help me I am having problems with my leadtek a250 ultra 4600ti. It has been crashing when under load ie. cf3 and the second test on 3d mark 2001 not the first one, I think it might be a power problem when I use the 250watt power it crashes after the 1st test in 3dmark 2001 and when I put in a 300watt power supply it can keep going till half way through the whole 3dmark testing. I think the 300watt power unit is playing up but when I done both tests all I pluged into was the hard disk,floppy and main board.