ill type what happen in more detail.
As soon as i changed to dual channel memory (without flashing the bios) i loaded the system up after i changed it, the post detected the memory etc then it got to the windows loading screen with the blue bars going across etc. it stopped and i waited for 9mins for it to do something and nothing happen so i restarted. Then the 2nd time i acctaully got into windows then my keyboard and mouse died and nothing in windows was loading (as in the background programs, msn etc) so i turned it off again. So i thought right id give it another format just incase windows corrupted somewhere along the line etc. Tryed to format (full format) it got passed the format and installing windows files then at the point where it instalizes the files on to the hard disk it crashed again i waited for 15mins it ushally is instant at this point. So i reset again then did a quick format and it flew through that and all worked changed to the hdd to it picked up the windows install. Then it hung on 39mins remaning i waited for about 30mins. Nothing so i turned off the system changed the jumpers for the cmos incase it was corrupted or something. tryed to load windows again (at the install point) and it still wouldnt move from 39mins. So as i knew the system worked on single channel mode i switched back again and installed windows perfect. flashed the bios updated to service pack 2, tryed to go to dual chan mode again and its still not taking it. I've no idea . i shall take a look in the bios and update you further. Thanks
Changed the CAS to 2.5 like you said it the DMI pool data notice came up and hung but a restart nudged it and seems to be loading fine now
what preformance will i loose out of changing the CAS? i'm thinking maybe that the bios just hates Auto and if i should put it on a higher CAS rate? Thanks Again
another update (sunday 2nd July)
I was trying out F.E.A.R and was happy playing a high pitched sound came and my monitor went blank (black) standby mode i have an connect3d ati crossfire card atm its blowing quite hot air out the back of its exaust fan.
Just booted up the computer (monday 3rd july 3:38pm) and loaded windows pressed the firefox link and it crashed. so i had to restart :/
And F.E.A.R still crashes when i play for about 20mins each time it freezes then the high pitched sound comes and i have to reset i cant bring up task manager to close it down or anything it seems that windows just crashes, it also happends with CoD2 so something isnt right somewhere.