Hi, thanks for your reply.
I have connected the gpu to another system, and it works just fine on it.
Clearing cmos did not work.
I believe my system does post. Atleast the fans start spinning. It does not boot into windows I believe, when the computer has been on for a while and I press the power button it instantly turns off, instead of taking a few seconds of time to fully turn off.
Could I try something else?