Radeon HD 7870 won't detect a second monitor on my machine

Cthulhushat · May 26, 2013

I recently bought a new XFX Core Edition Radeon HD 7870, and so far I've been unable to get it to recognize a monitor plugged into the bottom DVI port on my machine. My system specs are as follows:

Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 930 @ 2.80GHz (8 CPUs), ~2.8GHz Motherboard: ASRock X58 Extreme LGA 1366 Intel X58 ATX Intel Motherboard Power supply: Ultra LSP750 750-Watt Power Supply

I've updated my drivers (to 12.104.0.0) and have attempted to detect the second monitor in windows and in the Catalyst control center. I've also been able to rule out the following:

Monitors/cords: Both monitors work just fine when plugged into the first DVI port, and I can run a dual display on my other card just fine (a Radeon HD 5770). DVI ports: I don't think it's a problem with these, as a tech support guy at work was able to throw my card into a computer there and have it detect 2 monitors just fine.

I would appreciate any help with this, as I've run out of things to troubleshoot with my basic grasp of PC hardware.

The_Doctor · May 26, 2013

Cthulhushat :

I recently bought a new XFX Core Edition Radeon HD 7870, and so far I've been unable to get it to recognize a monitor plugged into the bottom DVI port on my machine. My system specs are as follows:

Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130318-1533)
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7 CPU 930 @ 2.80GHz (8 CPUs), ~2.8GHz Motherboard: ASRock X58 Extreme LGA 1366 Intel X58 ATX Intel Motherboard Power supply: Ultra LSP750 750-Watt Power Supply

I've updated my drivers (to 12.104.0.0) and have attempted to detect the second monitor in windows and in the Catalyst control center. I've also been able to rule out the following:

Monitors/cords: Both monitors work just fine when plugged into the first DVI port, and I can run a dual display on my other card just fine (a Radeon HD 5770). DVI ports: I don't think it's a problem with these, as a tech support guy at work was able to throw my card into a computer there and have it detect 2 monitors just fine.

I would appreciate any help with this, as I've run out of things to troubleshoot with my basic grasp of PC hardware.

The second ones proably Dvi -D does it have a warning in the Manuel saying Digital signal only I know some 7xxx have that.
The Doctor

Cthulhushat · May 26, 2013

The_Doctor :

Wow, good call. I didn't even notice there there's a slip in the box that says this, so now I feel like a moron for trying so many things to troubleshoot it! Can I get get a VGA to DVI-D adapter to remedy this (I'm currently using VGA to DVI adapters for both monitors). Thanks!

UPDATE: Okay, I found a DVI-D adapter and switched it out with the one I had on the second monitor, but still no dice. Again, I can plug it into the top slot with no problem, but it doesn't show up when plugged into the second one. Is there another step I might be missing here to get this to work, or could there be another issue entirely?

Search

Radeon HD 7870 won't detect a second monitor on my machine

Cthulhushat

Honorable

The_Doctor

Honorable

Cthulhushat

Honorable

TRENDING THREADS

Latest posts

Moderators online

Share this page