3x displays aren't working on R9 270x

[sk_]

I'm new to this, so forgive my ignorance.

Here is my display setup on my R9 270x

• 
  1x 1920x1080 monitor with DVI-D Cable
  1x 1920x1080 monitor with standard HDMI
  1x monitor with VGA (D-BUS) cable to DVI-D to VGA converter (£18 Startech one)) powered by microUSB

The two DVI-D monitors only work when the other is unplugged. So, only one can be on at a time.

Is this known issue, and is there a solution to it?

Thanks in advance!

 

[basroil]

Hard to tell with your specific card, since you didn't say what it is, but in general the 270x and in fact all R series cards only support three monitors when at least one is from the displayport. Some cards add additional equipment to allow three non-DP monitors, but in general they don't.

If you have a DP to VGA adapter you should try that

 

[sk_]

-snip-

 

[sk_]

Hard to tell with your specific card, since you didn't say what it is, but in general the 270x and in fact all R series cards only support three monitors when at least one is from the displayport. Some cards add additional equipment to allow three non-DP monitors, but in general they don't.

If you have a DP to VGA adapter you should try that

I can't find any VGA to displayport adapters, only displayport to vga - and that's what I need.

 

[basroil]

If you have a DP to VGA adapter you should try that

I can't find any VGA to displayport adapters, only displayport to vga - and that's what I need.

Did you actually read my post?

 

[sk_]

If you have a DP to VGA adapter you should try that

I can't find any VGA to displayport adapters, only displayport to vga - and that's what I need.

Did you actually read my post?

Ah, sorry - I misread it. I'm very tired, been trying to solve this forever. My apologies, I suppose I need to hunt down a displayport monitor then.

Or, as I've read elsewhere I would need two DVI-D monitors of the same resolution.

 

[k1114]

You don't need a dp monitor, just use dp off the gpu. Make sure it's an active adapter like so. http://www.amazon.com/StarTech-com-DisplayPort-Video-Adapter-Converter/dp/B003V4TV8O I don't think I've seen a 270x with a vga port so you can't even use a vga to dp adapter. That would also make no sense since you bought a dvi-d to vga adapter. Also it should have had a dvi-i port so you wasted money on it.

 

[sk_]

You don't need a dp monitor, just use dp off the gpu. Make sure it's an active adapter like so. http://www.amazon.com/StarTech-com-DisplayPort-Video-Adapter-Converter/dp/B003V4TV8O I don't think I've seen a 270x with a vga port so you can't even use a vga to dp adapter. That would also make no sense since you bought a dvi-d to vga adapter. Also it should have had a dvi-i port so you wasted money on it.

So, you're saying I *have* to use hdmi+dvi+dp and not hdmi+dvi+dvi with both dvi being the same resolution?
The DVI ports both work individually, but in conjunction.. Not at all.

 

[basroil]

Ah, sorry - I misread it. I'm very tired, been trying to solve this forever. My apologies, I suppose I need to hunt down a displayport monitor then.

Seriously dude.... I DID NOT SAY THAT
http://www.bhphotovideo.com/c/product/945085-REG/startech_dp2vga2_displayport_to_vga_adapter.html
There, buy that item and you can use your current monitor...

So, you're saying I *have* to use hdmi+dvi+dp and not hdmi+dvi+dvi with both dvi being the same resolution?
The DVI ports both work individually, but in conjunction.. Not at all.

No, I said that....

The DVI thing only works if the two monitors on DVI have identical TIMING, not resolution (though for the same timing to happen the resolutions will be the same). Unless you bought two of the same monitor, that will be difficult, and not all cards support that operation anyway.