[QUOTE]\nThanks RC. I did a google search for PSB Parking & drew a blank. Still don't\nknow what it is but I took your advice and enabled it. Doing so improved my\nSiSoft Sandra memory bandwidth score by about 250 points!\n\nPlease ignore my comments about Delayed Transaction. Disabling this item\nhasn't made any significant difference in system performance. Turning it on\nor off makes no measurable difference in memory bandwidth. I still can't\nfigure out what's wrong with my system. Benchmarking utilities seem to\nindicate I have a high performance machine but it is taking up to 15 seconds\nto open a file after clicking on an icon on the desktop or in explorer. It\ntakes a similar amount of time for the right click menu to appear. A second\nor third attempt to open the same file takes much less time, but this\ndoesn't seem like normal behavior. I'm new to WinXP as well as a new board\nso I'm not really sure if this is a software or hardware problem.[/QUOTE]\n\n\n\nI am getting the Same delayed option with XP sp1 and my GA-8I875 Ultra, if I\nupdate to the F5 Bios the PAT Fixed one, I can't boot at all, NO ACTIVE\nPARTITION, comes up repeated.\n\nI only have SCSI-0 IT8212 or the 250 Zip drives as boot options.\n\nWent back to F2 and all was OK..\n\n\n\nRunning the ITE Raid controller as ATA.\n\n\nThe Delayed Action thing is a product of this MoBo/Bios, as It never happened\non my old GA-8IEXP V2, and with XP..\n\n\nHave e-mailed Gigabyte about the F5 Bug..