Possibly an overheating problem...

Biostar Support indicates the Maximum Total Amount of Ram Memory is 2GB.

http://www.biostar-usa.com/mbdetails.asp?model=p4m80-m7

Go to this link
http://www.biostar-usa.com/mbdownloads.asp?model=m6twg
and download the motherboard manual. It gives you all the information you require.

just a shot in the dark here maybe you're power supply needs a little more power to support that video card + 8 gigs of ram + all other peripherals you use

Go to biostar website look in support then drivers for the exact model of board that you have. Then download all audio drivers & save them where you know where they are on your computer. Then unpack the drivers & follow directions. After install restart the computer. If it ask for drivers, check the box for automaticaly install drivers.

In that case, please see the following for instructions on how to resolve this issue; http://support.microsoft.com/kb/555304/en-us http://www.computerhope.com/issues/ch000465.htm Reference of original post for others reading this: http://www.fixya.com/support/t622148-bios_setting

Does the blue screen only occur when trying an over-install (e.g. without having setup wipe the hard drive first)?

yaa viz eagle is right, its really seems like frequency mismatch. The both RAM must of same size, same type, and same frequency.

Thanks
Iqbal

almost anything is possible, but in general a 430 watt P/S should be able to run 2 gigs of ram, however that doesn't mean that the ram you purchased is the correct ram for the motherboard or that you have so many other added perpherials i.e. dual or tripe CD drives, hard drives, USB perpherials that the load is simply to great for your P/S. A rule of thumb is find out what your system ' will ' run with and then work from there. For example if a person was serous about this problem he might disconnect all power connectors to all other equipment other then his hard drive, monitor/video card, and his motherboard just to see if the system could then boot normally. If it did, chances are the memory is okay for the motherboard in normal circumstances. However if the system did not boot normally, it might be an incompatibility with the 2 gigs of memory on that particular motherboard. Memory is not a generic add-on. A person needs to make sure the memory is correct for a motherboard before installing. Also you indicate the present P/S is only 4 months old, any particular reason why you had it changed out to begin with??

power suplly problem

If you click on the link you can download your motherboard manual and save for future reference. http://www.biostar.com.tw/products/mainboard/board.php?name=NF4ST-A9