my ram is gskill http://www.newegg.com/Product/Product.aspx?Item=N82E16820231225
i have an asus p6x58d-e. my ram is listed under the mobo manual as compatible.
i have built the computer on cardboard, and it was the same problem. I haven't replied for a while as I was gonna add a new hd to my computer...i guess there really wasnt a reason to not reply, but for some reason i suspect it may be my psu too...
memtest shows the ram to be perfectly ok, but i suppose it should be since once it starts up its okay.
as for an update: my computer apparently will not wake from sleep either. if the hdds turn off from sleep, then when i hit the mouse everything will start spinning again, but the display will not show (im running my os off of an ssd though...dont know if that changes anything)
my guess is between psu or gfx card...leaning towards psu