Gtx 650 PC not booting

[Rimad961]

Hi,
I have an Hp p6745ru
I recently bought the GTX 650.When I install the card the hp start up screen comes on and just stays there for a while. I hear a beep followed by another beep about 30 seconds later. The screen then turns black. 
I refreshed Windows and deleted any drivers associated with past GPUs.

Pc with my radeon hd6570 everything works fine. 
The PSU on the system is 550w which is recomended by nvidia for the 650. 
Card have not technical defects, i tested it on other PC. 
On other forums I read that my motherboard is not compatible with my gtx 650 because BIOS is a very old, so i need update him, but i can't find a new version (on the official site v. 7.15 but this ver. 2011 release). 
Where to find the new version?
Thank you so much,
Rimad

[Big_Dave · Accepted solution]

Hi,

Deleting out drivers is not going to solve the problem.

I suspect that the NVIDIA GTX 650 is not compatibile with your PC.  Your PC is 3+ years old and I wouldn't expect HP to post a BIOS update for your PC.

Return the graphics card and try the NVIDIA GTX 660 or one of the below NVIDIA GTX 750 models.

MSI NVIDIA GTX N750 TI and the MSI GTX N750 TF

[WebBlast]

Just need to disable BIOS Security Boot (UEFI Boot) through embedded graphics.

Sorry, I do not speak English!