Hello I'm back again I replaced the memory with some from crucial.com. tested it and fine.
I was playing rtcw quite happy when system froze solid. on 5336 drivers. When i reboot I got garbled screen when the dm service starts up. If i boot single mode switch to nv driver go to init level 3 I can startx.
If I then switch to nvidia driver and start dm again all works fine again.
If I reboot garbled screen again when dm starts.
Any help would be much appreciated. An ealier driver suggestion would be ok.