Lol, good one Andrius, what make you think 750w will do it, btw, i just save my money thats all and buy something when I have the money but I do have a good job, and its pretty sweet, but not much money when I am going for full custody of my little guy, lol but then again I do have nice things, thanks for making me laugh, the calculator says I need 1200w, my darn machine wants to take a dive all the time now but runs ok at 3.6 ghz with one 3870 doesnt reboot all the time now but will sometimes, it sucks b/c that antec 650w was darn good.
Full System QC 3.0GHz (120W) + HD 3870 + 1HDD + ODD = 300W (350W for margin of error)
HD3870 has 2 power connectors so : max 225W
Another HDD and ODD : max 30W
10 fans let's go with : max 30W
120W CPU (1.5xOC) ~ 250W upper limit
350+225+60 = ~600W
add 150W for OC
600 + 150 = 750W
if you think I missed anything important let me know (it's 5:30 AM here).
TIP1: save money on the CPU.