mobo- PC-AM2RD790 - PURE CrossFireX 790FX by sapphire
850w antec power supply.
both cpu and both video cards are liquid cooled, the video cards are being supplied with both of there 6pin and 8 pin power connectors and the crossfirex is attached to both cards.
here is the problem, the bios posts up and reads all the drives. once the bios is finished with its thing i have the windows vista 64bit home premium sitting in the drive bay ready to be installed but after the bios finishes the screen shuts of to power save mode and the computer just hangs there and does not isntall windows. I have changed 1,2,and 3rd boot devices to the combinations of cdrom, usb-cdrom, and removible. there is not dvd to be selected. The bois does read the philips dvd drive and has it listed but i just cannot get the drive to install the disc. the only info i can offer is that on the mobo there is a led display that cycles on start up with numbers. I am guessing these are post codes. The number that is last displayed is "94". please i hope someone can help me.
What happens if you take the Vista install disc out and just let the system try to boot without it? Obviously it can't actually boot with no disc and two empty hard drives, but it should attempt to and then say "Disk boot error, insert boot disk and press enter" or something to that effect.
Well, just to rule out any of your boot devices causing any problems, unplug them all (hard drives and DVD) and let it try to boot. Again, you should get the "Disk boot error" thing I mentioned earlier. If it still does the same thing, try each stick of RAM individually if you haven't already. I noticed that a BIOS update for that board was released recently, so you might try that as well. Of course, you might have trouble updating the BIOS if you can't boot off anything as a BIOS update usually requires a bootable CD or floppy, unless the board's BIOS has an embedded flash utility. I'm not sure if your board does or not as I'm not too familiar with Sapphire's boards.
It looks like a fairly new model, so if it does have an onboard flash utility it should be able to read from a flash stick. The key word there is "should." An onboard flash utility will also read from a floppy for sure. If you don't have a floppy in your build and don't have a spare lying around, it wouldn't be a bad idea to pick one up. They're nearly obsolete, but still handy for those "oh #*&!" moments, and shouldn't cost more than $10.
well i am going to rma the mobo, i took my old ide HDD with an o/s from my recent computer and same thing. i found what the post code "94" ment and it is "init boot" well that scares me so i will have to see if a new mobo does the same thing. that should result in me getting a new cpu then and finding that was the problem all along. unfortunately i dont have a system i can test the cpu on to see if that is the issue.
to eliminate the chance of a failed piece of hardware you should remove all parts except 1 stick of ram, 1 hdd, 1 video card and see if it will post and pass memtest. If so add ram and do another memtest untill all ram works, add the other video card, install the os, add 2nd hdd later.