I just put together my first build comprised of the following components.

Antec 900 case
evga 750i FTW motherboard
E8500 Core 2 Duo
evga 8800GT 512mb superclocked
4gb DDR2 1066
320gb WD caviar HDD
Corsair HX620 PSU
Zalman CNPS9700LED cpu cooler

I plugged everything in and powered it up. All fans/ LED lights come on, but there are a couple beeps and the monitor acts like it isn't recieving a signal. The post code on the mobo goes through a bunch of different numbers before finally settling on 7F. According to the mobo manual, 7F is POST error check-Check POST error and display them and ask for user intervention. I don't know what that means. Can anybody help? Thanks.

Also, let me know if there is more info you need.

Talk to me about your PSU.

Also:

Quote:
"7F deals with user intervention, in your case BIOS still has the floppy drive set to enable so therefore trying to search for a floppy and connot find one, and getting the 7F. If you have display you'll see that it says exactly this and you would need to press F1 to continue.

I've seen a couple of times for some odd reason that the Primary PCI-E needs to be reset.
Try putting the video card in a different PCI-E slot and connect the monitor. You should see a message telling you to put the video card back into the primary slot. Go ahead and put the video card back into the primary slot, hook up the monitor and see if this fixes it for you. "

Users also seem to say 7F can be caused by a faulty video card.

What would you like to know about the psu? Let me know.

Also, I will try switching PCI-e slots. I read about that somewhere else.

Video card is not faulty. It was working just fine last night before I took it out of my old comp.

brand/wattage rating/+12V rails

Corsair HX620w
3 +12v rails 18a each

Great PSU so that is probably not the issue.

That Corsair HX620 is actually a single rail, even though they say it's a multirail. It's definitely not the PSU.

Here is a little more info. The blue mobo light is on, along with a green and an orange right above it. Also, while the post code display is going through a bunch of numbers, it makes one beep at 26 before continuing. The manual says 26 is clock gen-Init onboard clock generator and sensor.

Also, I thought maybe my ram was the problem. The board supports up to 1066, which I have, but I believe it is native 800. I have heard of people using slower ram to get into the bios and change, and then installing the faster 1066. I tried this with some DDR2 4200 that I have, and got the the same result as before.

I don't mean any offence but Ihave to say
You were not able to stay away from crappy nForce chipset mobo ???
Try to update Bios

Well, I like evga and this board is pretty highly rated on several professional sites. Guess I should have paid more attention to the evga user forums...

I tried putting in an old 6800 in place of the 8800gt. I was able to get video and access the bios. My 8800gt works fine in my old comp. Why would it not work in the new one?

While I had video with the 6800, I attempted to install Vista Ultimate 64. I got three bsod, but each time I was able to get a little farther. It said to check that all hardware/ software was installed properly. I made sure everything was properly seated. I'm not sure what else to look for.

Is your optical drive a SATA model? That is a classic problem with nVidia chipset motherboards. BSOD when trying to load Windows from a SATA optical drive.

Try setting the drive to IDE mode and see if that helps you.

Yes, it is SATA. I'll try that.

Would I be able to go back to SATA after Windows is installed?

How do you set it to IDE? Bios? Can it be in IDE mode if it is actually plugged into sata?

BIOS..

and yes...