Hey all my spec is: DFI LanParty NF4 SLI-DR EXPERT (Bios 12/07/05) AMD Athlon 64 3700+ @ 2805mhz, 1.52v - XP-120 H/S OCZ 2GB (2 x 1GB) PC3200 Platinum Series EL-DDR CAS2 Sapphire ATI Radeon X1900XT@XTX 512MB PCI-E x16 SoundBlaster XFI Music 2x74gb Raptors RAID0-System drive Hitachi 250gb sata2,swap Max10 300gb Pata, Max9 80gb Sata, Samsung 160gb Pata, Seagate 7200.9 80gb SATA2 swap external USB2 NEC DVD, FSP 700Watt PSU Now the other day I was playing BF2, it crashed, I rebooted and got: NTLDR is missing, how annoying, After a couple of weeks messing around and having to boot off an A: drive to make NTLDR work I found out it was my MAX9 harddisk, when its unplugged it works fine, plug it in with windows running system become unstable after ~2 mins. FINE i thought, seems BF2 crashing screwed my MAX9 sata disk, it is about 3 years old to be fair. I dont get how this drive makes it not boot though, its not a swap file drive or anything, it simply has games on it. SO ON WITH THE PROBLEMS, I remove the MAX9 drive completely from my rig, boot up,and all my drives are there (in my computer in windows) apart from the Samsung 160gb Pata, odd I thought, switch off again, switch back on and get a: MACHINE_CHECK_EXCEPTION error, wtf Check all is plugged in, looks fine, boot again and still get the error. Switch off and unplug data and power cable from Samsung drive and now seems to be working fine Iv done research and machine check exception errors nearly all relate to a PSU problem, how on earth can it be that ? its a 700WATT FSP, about a month old !, my old 485watt enermax handled the system with a x1800XT 512 in no problems, i only got this 700watt as i thought i was pushing it. Also its been running a month with all the drives in working fine, what all of a sudden has led to this maddness ? any ideas anyone ?