According to the information on that link, you need DDR 200 / 266 ECC Ram. ( Also known as PC1600 / PC2100 ) Some info on it:
# DDR-200: DDR-SDRAM memory chips specified to operate at 100 MHz
# DDR-266: DDR-SDRAM memory chips specified to operate at 133 MHz
# PC-1600: DDR-SDRAM memory module specified to operate at 100 MHz using DDR-200 chips, 1.600 GByte/s bandwidth
# PC-2100: DDR-SDRAM memory module specified to operate at 133 MHz using DDR-266 chips, 2.133 GByte/s bandwidth
The Ram you have linked is faster than your board supports.
Not to mention it's not error corrected.
Try this Ram:ECC RAM
You'll notice it's somewhat expensive. That's that ECC part kicking you. . . . ( ECC = error correcting code ) It's usually only found on server motherboards like the one you have here. It's designed to be more stable since it IS going into a server after all. . .
I don't see where the board has a PCI express slot. It is loaded with PCI-X ( don't confuse the two, they are not the same ) but not PCI-E ( as PCI express is known ) It appears to have an integrated ATI GFX chip with a whopping 8MB of video memory
If you're wanting to game, I would suggest a new motherboard.
Take this all with a grain of salt. I don't proclaim myself to be the all-knowing guru of hardware. It is, however, my take on it