Monitor not working using a DP to VGA Adapter

[IridescentDGWG]

Hey Guys,
I've just ordered a GPU, the MSI rx470 Gaming X, and an adapter to connect my old Dell TFT-Display. So I put the gpu in, thought all would be working, but as it seems, my display keeps getting no signal. I also tried to connect it to my mobo, which also didn't worked. That is strange because it was connected to the mobo before I built in the gpu and everything was fine. I've switched the monitor with an Samsung TFT(also vga) and it still not works for both sides,integrated graphics and dedicated gpu. Anyone got some suggestios for this? Is it the adapter's fault? Is the gpu disabling my integrated graphics? Thanks in advance for every help!

 

[Mousemonkey]

Does that card actually output a VGA signal?

 

[IridescentDGWG]

That's why I bought this adapter. The card has no output for vga. The adapter has a male display port and a female vga.

 

[Mousemonkey]

If the card does not output a VGA signal then you will need to use an active adapter or replace your monitor(s).

 

[IridescentDGWG]

So I probably ordered a passive adapter? Damn. Ok, I'll need to find an active one. But there is still the question, why is the vga on my mobo not working either? Is it because the cpu thinks that, when the gpu is installed, there needs to be a monitor connected?

 

[Mousemonkey]

You probably need to activate the onboard VGA in BIOS if you have a discrete card installed.

 

[IridescentDGWG]

Ok. Thanks for the quick answers!