Ok first off i took every thing out of the Slimline case and put it in a big ol mid tower ATX case and it fit great and i also threw away the old crappy PSU it came with and put a great 50 Bronze PSU with it. So not it has enough power for the GPU i want which will be an MSI R7-260X or EVGA GTX 750Ti SC and i am worried that i will not be able to install a GPU even thought he Motherboard has a PCI 16 slot for a GPU i am worried that it will not work considering this PC has no BIOS from what HP told me over the phone. They said that this and other models of the same have a chip made in the motherboard that makes it impossible to use the BIOS no matter what you do even if you remove the CMOS battery. And the BIOS also has a PASSWORD needed to enter the BIOS but HP said there is no password it just asks for one so i have no idea what to do. DO i need to be able to enter the Bios int he first place to install the new GPU? And also will the GPU i want work with this layout guys? It is all stock parts just new case, PSU, and another 4GB of ram.
http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c03791266
http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c03791266