No Display - Part 2

Well, I went ahead and replaced the motherboard with another M2N-SLI. I
got the system back together. It is now giving me a POST, but it is giving
me an error, and I still have no display. It is one long beep followed by
two short beeps. From what I understand, this indicates a video problem.

I already know the video card is good, as I tested it in another system.
I already tried reseating it and moving it to another slot. I am more
suspicious of the RAM because even when I remove all the RAM, I still get
the same error code. I cannot test the RAM as I don't have access to
another system that supports DDR2 RAM. I've heard and learned that
AMD-based Asus boards are very picky on RAM and the voltage they are rated
for, especially the M2N-SLI. I've also heard lots of conflicts with G-Skill
RAM and Asus boards. The G-Skills I am using are rated at 1.8V-2.0V. The
motherboard supports a max of 1.95V.

Do you think I should send the memory back for a different brand or do
you think it is something else that's wrong? Thanks.