I've put a new Z77 mobo and a 2700k into a 12 year old HP workstation, I've also put a SSD in there for Intel Smart response. Problem is when I install a HD7750 2gb I don't get any display at all, can't even see post. When I put an old NVidia Quadro 540 in it works, and the on board graphics works too. And the new GPU works in another system. The new GPU requires a minimum 400W PSU and it has no extra power connectors, it is just powered by the PCI. The old PSU is 460W. I don't know much about power supply's and I'm wondering if there is more to them than just the wattage output? Like is there any other PSU requirements?
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7/1/13 at 11:02am