I need help finding the cause to my frequent BSOD. My systems is an older A8v/Athlon 64 X2 that has been fairly trouble free. About a month or so ago, I thought I had a drive failing in a RAID 0 setup, because I was getting "could not read.." etc. at boot up of OS files. Chkdsk was returning errors, but correcting them. Since it was a RAID0, I decided to buy some new drives and setup a RAID5. After installing new controller and drives, I started getting BSOD x7A every 4-6 hours. After reading a lot of forums, I ran memtest and found I had a bad pair of memory. Removed bad pair, re-formatted and re-installed XP. After clean install of XP SP2, I got a BSOD 0xf4 during the night as the computer was 'idle'. Only thing installed at this point was XP SP2, Si3114 driver, video driver, and mother board drivers. This is my main work system, so I continued installs. I am still getting BSOD 0x7a - SCSIPORT.SYS every 4-6 hours. If I restart my system before a BSOD, I can stretch time between BSOD considerably. I've run chkdsk - no erros, re-created pagefile after defrag, memtest overnight with 27+ passes no errors. Current temps - MB 15C, CPU 39C. Voltage are correct and stable, no overclocking My current setup is: XP SP3 A8v mother board Athlon 64 X2 4200+ Enermax 420w Radeon 9550 1G (was 3G) Kingston KVR400X64C3AK2/1G - my /2G sticks are being RMA'd RC-209-EX - (Sil3114) SoftRAID5 w/ 3x HD103SJ - 4 parts, boot 120G on board VIA SoftRaid0 w/ 2x WD800JD No other cards installed. Memory timings are 3-3-3-8 & 200MHz I've attached the last 10 mini-dumps since this install (newest_minidump.7z). I've also included a partial of the previous install mini-dumps(first_minidump.7z) and my original install. I uses this system daily and any help would be greatly appreciated. The RC-209-EX and drives are only thing new in system. BSOD occur even when computer is 'idle'. One happened at 12:02am and again @5:21am - I had not touched system. I had turned off auto-restart, but re-enabled it, to try and track how often BSOD occurred.