Hi I just completed my second homebuild, I installed windows 7 pro and have been running it for over two weeks now, (got it pre release from msdna for free, thats right free, gotta love being a student, as many copies of 7, vista, xp and visual studio, and tons of other cool software for nada.) anyway: asus m4a78-e mobo 8gb (4x2gb) ddr3 ram amd phenom II 945 3.0ghz quad core processor. xfx hd 4850 1gb gddr3 gpu 256 bit with 512mb onboard already 2 x 500gb hitachi deskstar hdd's sunbeam acb9 acrylic green led pc case (12 green leds, with 5 80mm green led fans, and custom fan grills.) 19" tft 650tx corsair psu onboard sound and networking it works great, so far I haven't seen the cpu go over 8% you through stuff at it it gives you a blank look and shrugs, it took a virus scan, dreamweaver, word and a few web pages (chrome) at 8% for god's sake. Anyway i'm very pleased with it. BUT it only lists one hdd in the my computer section and that is the drive that i installed windows on, I don't know if the other one is formatted or not, I would say not, the bios recognises both of them, but my computer displays only one, i have not used raid in any form. Whats the solution? Thanks alot, bob.