Ok, recently I decided to upgrade my computer with a new motherboard and new processor, wouldn't be that dificult since I have already built 3 computers (nothing big, I know.)

Anyway, after installing the MB, processor and heatsink/fan, connecting the power supply and IDE cables I went and tried to start it up. The computer appears to start up, all the fans started up, but then a get a loud system beep (continous) and the fans die down and the computer turns off. Nothing ever appears on the monitor and nothing I have done seems to fixe the problem.

Now, here are the specs

thermaltake Xaser III case (put this on cause the restart button has fallen off, but that wouldn't casue this kind of problem, would it? it didn't on the old pc/mb)
Antec 480 power supply (replacing the original thermaltake 480 watt ps)
Abit NF-7 S nforce 2 mb (replaced a soyo kt333 ultra plat)
AMD Barton 3000 333 fsb, (replacing an old AMD XP TB 2200)
Alpha Heatsink/Fan combo (new one, but used the exact same on old combo also.)
3 pc2100 512 sticks of kingston ram (i highly doubt this is the problem, as I have had ram problems in the past, and it doesn't cause your computer to shutdown right after start up)

Then just the regular old hardrives and cdroms.

Anyway, I am completely lost, I don't know what could be causing the problem, but I strongly feel it could be the motherboard or processor (both appear fine and there are no burn out spots, or bent items, I have also flashed the bios once (tried it w/ out flashing and then w/ flashing) Again this is my plea for help, I am out of ideas and don't know what could be causing the problem.

Lookup bios beep codes for your particular bios, and then compare that vs the beeps you are hearing. the beeps should tell you exactly what the problem is.

Edit: I'm killing time at school right now so I looked it up for you

Mobo site:
http://www.abit-usa.com/products/mb/techspec.php?categories=1&model=6

Award Bios Beepcodes:

http://www.comptechdoc.org/hardware/beepcodes/1.htm
http://www.bioscentral.com/beepcodes/awardbeep.htm
http://www.pcguide.com/ts/x/sys/beep/awardContinuous-c.html

Looks like it's a ram problem.

Infinite

Aye, you are right, thanks for the help! The thing is though, the problem is actually the mobo, but has to do with the ram slots. I finished building my parents computer tonight and tested out my ram in theirs and all of it worked (tested each stick seperately and then all three together) and they all worked fine.

Also, checking the mobo site you gave, my packaging was incomplete, I didn't have any ribbons, that green nf7-s card, the one to two power splitter, and my floppy wasn't even in a nice plastic bag :p