How did you get on?
I think you have the graphic problem.. The Intel Core i5 2500k has graphic HD 3000 built in. There will be conflict. The second issue is PSU bad. If the MB is bad, will never boot anything...
So remove your VD card and hook to MB VD board... There is a guide install ML with HD3000.....
I am still think the bad PSU. You can go local store and gets new one and test out. Yes, sometime is good function but current is not stable. Also, you can get a little speaker to test the beeps sound to know what hardware is failing. CPU, RAM... never known.