[SOLVED] PC/Monitor doesn't see GPU

[Eupeni199]

Hello there.
I've recently bought myself an AMD R9 280x to replace my old Amd HD 6670. Downloaded drivers, plugged it in, plugged HDMI in and all I see is black screen. Plugging into motherboard GPU - black screen. Unplug R9 from power supply, reboot - I get motherboard graphics with onboard graphics as the only option in Device Manager. Plug 6 pin power back into R9 (it has 2 PCIe sockets - 8 pin and 6 pin, fans start working from 8 pin alone, but not from 6, so both are plugged in). PC reboots with a black screen. Plug HDMI into R9 slot - black screen.
I'm 95% sure I've missed something, so any advice and ideas would be a massive help
System spec:
AMD FX-4130 3.8 GHz
Gigabyte GA-78LMT-USB3
8GB RAM DDR3 1600mhz(don't known if that's important)
MTX Radeon HD-6670 2GB (put old one back in, everything works fine)
PSU - TESLA 750w(apparently R9 runs on 250w so this one should be enough. Don't know if this might help but my PSU only had a 6 pin PCIe plug, so I've bought a 2x SATA to 8 pin connector.

 

[Dark Lord of Tech]

You need to get a proper PSU , DON'T USE ADAPTERS.
That PSU is very very poor quality.

 

[Eupeni199]

So it's not working because of PSU and because of SATA to PCIe adaptor? Because it seems to have enough power as both R9 fans are working. Is Tesla not a good brand?

 

[Dark Lord of Tech]

Tesla quality is super poor.

 

[Eupeni199]

Замена блока питания решит мою проблему? Или это совет в целом?
Will replacing a PSU solve my problem or is that just advice in general?

 

[Dark Lord of Tech]

Possibly , but either way you need a decent PSU if you want to run better hardware safely. A 750w should have more than enough connections and that one doesn't , so you know it's very poor quality. PSU protects and runs your components. Failure of a low quality PSU could take out other hardware.

 

[Eupeni199]

Yeah that makes sense. Any ideas what else could be the problem?
Also any advice on a better PSU? I've read that 650w one should be enough, any good examples on a budget?

 

[Dark Lord of Tech]

650W would be a wise , choice , be sure to get a good make and model.
Corsair CX or CXM 650w , the black and grey models.