No display on power up, I get a POST but unsure of the beeps

I have an Asus P5E3 Premium motherboard, my memory is Corsair XMS3 DHX TWIN3X4096-1600C7DHX 4GB DDR3 2X2GB DDR3-1600 CL 7-7-7-20 Dual Channel Memory Kit. I have 2 Radeon 4870 X2 HD graphic cards. I've been getting no display on boot up or a POST. I couldn't figure out what was going on. I had taken it into my local PC repair shop they told me that one of my sticks of RAM was dead. So i RMA'ed the memory back to Corsair. I got the new memory today. To my disappointment I still don't get a display. I do get a POST now though, I get one short beep, followed by another short one 10-11 seconds later. I've looked in my motherboard manual and it doesn't have this particular sequence of beeps listed. I have a keyboard connected FYI. Is there anyone here familiar with this motherboard or its BIOS and could help? I tried both my graphics cards together and separate, still no display.

Yes all the PCI-E power connections are hooked up

I was just looking on ASUS's website, someone had an ati graphics card a couple models below mine and they were not getting a display. The were told to update their BIOS. My question is how do I update the BIOS if I can't see anything! Is there a way or am I gonna have to go out and find the cheapest pci/pcie graphics card available? (the only other cards I have around here are AGP)

does your board have onboard graphics? if it does then you can just take out the graphics cards and boot with the onboard one then update.

hope that helps :S

Thankfully I still have a old pci graphics card around here. I finally got a display! I'm gonna try and update the BIOS now to see if that will get it working. Some say that the BIOS that came with my particular motherboard was too old to run the newest CPU's and graphics cards. This is the most progress I've had in over a month so I'm excited.