finally i've connect laptop with my monitor and monitor works like charm,
so "no Signal" error for acer monitor is out from list,
I'm also taking out PSU from my list, as it's Crossair TX 750 W psu which is enough for gtx260, intel q6600, 2 HDD and 1 DVD WR and some other minor goodies...
i've also run my setup without zalman cooler, and as i expected my pc got off aft few min, due to overheat..(i could hardly take out cpu that time, feels like lava) so from above steps atleast we know that psu is running CPU and it got overheated...
my fair guess is RAM could be culprit,
or GPU, but as i don't have any ddr2 or ddr3 RAM in spare to check,
here's one question for vetrans, i have pc (above specs) 1 vaio laptop which have vga cable support, can i test my GPU with use of laptop?
Hoping to get reply, atleast i'm trying all possible way to narrow down our search, but my knowledge is limited so plz plz reply if anything i can do to perform any test or any suggestion..