AMD Radeon R9 270X ports are not working on Mac Pro?

[HK1234]

I have a problem...

I have a Mac Pro "Eight Core" 2.8 (2008). My old graphics card "died" and I bought another one.
The new card is AMD Radeon R9 270X, 4096mb. With OS X El Capitan it almost works. One monitor is working and one display port (dvi) is working, but I can´t get a picture from HDMI or any other port. This type of problem is new for me.

What can I do?

 

[Feartech]

I have a problem...

I have a Mac Pro "Eight Core" 2.8 (2008). My old graphics card "died" and I bought another one.
The new card is AMD Radeon R9 270X, 4096mb. With OS X El Capitan it almost works. One monitor is working and one display port (dvi) is working, but I can´t get a picture from HDMI or any other port. This type of problem is new for me.

What can I do?

real mac? you may want to visit the Apple Forums

 

[HK1234]

Have to try everything.... My Mac is so old that nobody seems to know what to do...

 

[Stork]

I recommend you post your problem on the MacRumors' Mac Pro forum section > https://forums.macrumors.com/forums/mac-pro.1/

 

[HK1234]

Thank you! I will do that. Hope someone knows what to do. Really need the second monitor...