If you still have access to you brothers computer, then try the memory in there if his board will take it, oor EVEN try your brothers memory in yours see how it fars, if not i can not OFFER any other suggestions than the mobo, but usually when a mobo goes you get a burning plastic smell and maybe even a little puff of smoke, but it will still power on, okey dokey sorry i could not help you anymore than that please let me know how you get oon with it.
all the best regards
Simshiok i switched slots with my video card and then i moved the ram into the alt slots also started up and GOT the 1 long beep followed by 2 short beeps, it says its Display adapter problem (MDA, CGA) on the web but i don't know what that means, i know the video card itself works in other computers. Can you recall the name of your BIOS? I doubt that that is what the code is referring to because you probably don't have a "Standard Original IBM BIOS"...

Try all the sticks of RAM you have in the slot closest to the motherboard and note any POST error beep codes, one at a time.The Asus Crosshair uses an Award bios according to Asus' homepage and 1 long and 2 short beeps should INDICATE a video error.yeah thats what i KEPT reading. however i decided to try putting my ram in one at a time for the millionth time and i lucked out and it turned on with the one stick, im gonna test the other one to confirm that it is a bad stick before i RMA it, god bless corsair and their warrenty