Motherboard problem? new system help please!

Hi guys, looking for some help as to what maybe wrong. I was thinking maybe the mobo, but i'am not sure. I just bought everything about 5 days ago, and put it all together about 3 days ago.

thermaltake armor+mx mid tower,
evga 750iftw mobo,
Q8500 3.16 ghz intel cpu,
2x2g Patriot viper sli ready ram 1066,
WD 500gb HD,
Evga gtx260 core 216 superclocked,
zalman cnps9500at cpu cooler.
Pc power & cooling 750 watt silencer psu

first day took a while to put it all together and fit it in but i got it up and running. installed windows xp professional 32bit sp2 (sp3 now). installed all drivers and updates i could find for all the hardware. checked bios obviously to make sure temps and everything were normal which they were. so i tested it out with the game that it came with, FarCry 2, ran amazing. figured all was good the whole thing runs every cool.

next day i get home from work and i boot up my pc and well the thing turns on shows the normal post code FF, but nothing shows up on monitor and mouse keyboard are not on. so natually im upset, go over all the plugs and everything seems to be in the right spot. try to boot it up again, nothing, fans are all going and post is showing FF, still not booting on my monitor to bios or anything, mouse and keyboard have no life. keep trying to boot after checking connections again it eventually boots to bios, and then windows. check online for people with same problems, some say maybe mobo some say bios problems. while im looking online pc freezes. eventually i get it up again after a few trys and i get the new bios and install it. pc now boots properly.. at least so far, 8 straight times now. then this morning i get a blue screen right after loading windows, sadly i was so frustrated i didnt catch the error. had to go to work. get home (currently) and get system recovered from serious error screen, submit error to microsoft and the site says possible hardware problem, but doesnt elaborate. so im here now looking for your help, sorry long post, but after a $1000+ i need to know whether i need to RMA anything, or can the problems be fixed?

thanks for any help!

edit: had to turn it on and back off 3 times before it would boot to bios then windows.??? im so confused.

could be the memory check what voltage they should run at through on there website