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AMD EyeFinity - Issues with Triple-Screen setups and 120Hz Refresh Rates

By: Anthony Garreffa | Editorials in Displays & Projectors | Posted: Mar 2, 2013 6:54 am
Manufacturer: AMD

EyeFinity and 120Hz - it just doesn't work




I decided to buy the most expensive GPU on the market, an AMD Radeon HD 5970 - the dual-GPU beast from AMD. I discovered it had two dual-link DVI ports, and a single miniDisplayPort connection. DisplayPort had arrived with the Radeon 5000-series, so this was going to be interesting.


DisplayPort is capable of 1920x1080 at 120Hz, but my monitors were all dual-link DVI, so I needed to convert my miniDisplayPort to dual-link DVI. My only option at the time from retailers near me was Apple's miniDP to dual-link DVI converter, which cost me $150.


I hooked it all up at the time, and it didn't work - the third monitor in my EyeFinity configuration would set itself to 640x480 and would not work. Someone on the Widescreen Gaming Forums helped me out and wrote me a custom driver - this worked after forcing the monitor driver and rebooting 5-10 times where it would randomly work, and stay working for a few days at a time.


It wasn't good enough, and it continued to drop out and have issues - so I moved to two GeForce GTX 570 video cards in SLI - perfection. First time setting it up it worked and stayed working for the entire time I had those GPUs, until just recently.


Just a few months ago I received a Sapphire Radeon HD 7950 from Sapphire, and dropped my three-screen Surround Vision setup for a single Samsung S27A950D 27-inch 120Hz-capable monitor. This would do for now, as I was working a lot more and didn't have much time for triple-screen gaming. This didn't last long though, and like an addict, I was back.




Fast forward from there, to now, and I have a bunch of GPUs in my office that I've been testing. This was a long three-page introduction, but you have to see where I've been, to know where I want to be now. I'm currently testing some Radeon HD 7950's in CrossFire, on two of my Alienware AW2310s and my single Samsung S27A950D.


Problems, again.


On the rear of my Sapphire Radeon HD 7950 are four display connectors - a dual-link DVI port, an HDMI 1.4 port and two miniDisplayPort connectors. So my only way of getting triple 120Hz-capable monitors is to use two miniDP to dual-link DVI converters, and the dual-link DVI port. So I purchased another miniDP to dual-link DVI converter in the hopes of it working.


Boy was I wrong.




Headaches on top of headaches. I forced the drivers again, and this time it just won't work - out of the 20+ times I tried it, only a couple of times did it work for some 3DMark benching, and a quick bash at Battlefield 3.


If I rebooted, it would hang, or it wouldn't load into Windows and remember my EyeFinity configuration and upon setting it up again it would fall over.

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