All 3 dumps are identical:
Are all drivers
up to date, including chipset?
Try testing your ram:
(you want the 2nd one Download - Pre-Compiled Bootable ISO (.zip)
). Unzip it then create a CD from the iso file using your CD burning software. There is a good freeware burner called ImgBurn
which will do this easily. DO NOT
burn the .iso file directly to CD. It must be used as input to a program that knows what to do with it, like the one I mentioned above.
Boot the CD and run for at least 3 complete passes unless it shows errors sooner than that.
Edit: You could also try removing ram and see what happens. If you have two 4GB modules, remove one. If you have four 2GB modules, remove two (in pairs).