GTX 960 Drivers Issue?

[L0onAt1c]

I just recently installed a GTX 960 Mini 4GB into my Dell Optiplex 790, I installed the drivers and when I went into MSI Afterburner I saw that the core clock was at 699MHz, I thought this was probably a glitch or something so I went into csgo and ran it at high settings with 8x MSAA and 16x Anistropic filtering, and I was getting around 20 fps. I knew something was wrong because this was much worse than an old R9 270 I had in the PC which died recently. After it died I promptly uninstalled the AMD drivers. I went and installed the latest drivers for the GTX 960 again and this time my nvidia control panel disappeared and when my PC booted up: only the monitor which was connected by VGA got signal, my other monitor which was connected by HDMI was receiving nothing, AND on top of that, the resolution was all messed up, it would only go upto 1600x1050. Now I Re-reinstalled the drivers and still, the res is all messed and only one monitor receives signal and when I open MSI afterburner it doesn’t recognise my graphics card, and when I tried to play a game, I got an error message saying that no graphics drivers are installed even though they clearly are AND now my PC has become incredibly slow, it was perfectly fine before the graphics card and the nvidia drivers. So I’m attempting to reinstall Windows to try it all again.

Does anyone know why my graphics card core clock was so low? I had the 6 pin connector plugged in, I’m using an EVGA 600W W1 PSU

Does anyone know why the drivers aren’t working? And why my PC suddenly became so slow? I tried opening the nvidia control panel from the window control panel but it won’t open.

pleaseeee, can someone help? It’s really getting on my nerves and it doesn’t help that this is my first PC build.

[corrado33]

Use DDU to uninstall all drivers, then reinstall nvidia drivers.

 

https://www.guru3d.com/files-details/display-driver-uninstaller-download.html

[L0onAt1c]

I did that, and when I tried to install the latest drivers this happened... twice. Each time I did use DDU and then installed the drivers.

Even though the installer failed my card has some drivers running (388.13) on it right now but the gpu core clock is at 700MHz:

What do I do about this?

[L0onAt1c]

As it turned out, the GTX 960 was actually a fake card, a scam part. So I returned it and replaced it with a GTX 1050, and the reason I couldn't update drivers was because I was running an old BIOS, so I updated my BIOS and managed to install the lastest drivers no problems.