Can't get Gigabyte Radeon HD 7750 oc to work!

[UnluckyX]

Hello gentlemen,

Some time ago I bought a Gigabyte Radeon HD 7750 oc ,and I could not get it to work, the fan was spinning and the video output was working fine ,but the card was not working at all ,like it was not powered on. My mobo was a APM80-D3 that has a PCIE 1.1 slot ,and the card is designed for PCIE 3.0 ,so I thought that was the problem and stoped trying to make it work.

Then I changed the APM80-D3 to a ASUS M5A78L-M LX/BR ,and tried again to make the Radeon work but got the same result.

The fan spins and video output works, but the card don't work and is not detected by windows. The drive is installed but don't detect the card.

I used GPU-Z and it shows some information about the card, but in GPU and Memory Clock it shows 0 MHZ.

Below is the link to the captured GPU-Z screen:
https://s19.postimg.org/hbp0gck9f/hd7750.gif

In the two mobos my old XFX Geforce 8600GT works normaly, so the mobos are good.
I never tested the Radeon in another machine, so i can't say for sure it's good, that's why I'm asking your help to eliminate the possibilities.

I'm suspecting that my generic Bluecase 500w PSU can be the problem.
Specs of the PSU below:

https://http2.mlstatic.com/fonte-atx-para-D_NQ_NP_562611-MLB20589933615_022016-F.jpg


My machine specs is:

Processor: Phenom 2 x4 910 (95w)
Ram: 2x 2GB 1333mhz
HD: 500 GB
DVD drive: DVD Burner Sansung
OS: Win7 Ultimate 64 bits

I wii be thankfull for any reply.

Sorry if my english is bad.

 

[junkeymonkey]

maybe just a bad card . with out drivers [ using windows standard vga ] it runs in a low power safe mode state. then you add the driver to give the card its full function and when you do install the drivers it fails [opinion]

could be that off the wall brand PSU as well ?? a 7750 should run on a 500w psu I think giga rated a 400w for there use ''•System power supply requirement: 400W ''

http://www.gigabyte.com/products/product-page.aspx?pid=4131#ov

all you can do is test the card in another compatible system / better psu if it does the same call it bad, if it works well with the drivers installed then look at something else like that psu

 

[lordmogul]

I second the idea of a bad card.
I had a R7 250X (basically a renamed HD 7770) on a heavily OC'ed Core 2 platform for quite some time without any issues. And that board only supported PCIe 1.1 aswell.
Have you tried putting the card in a different system, to make sure it is not the board?