GTX 970 questions about multiple monitors (tough!)

_artanis_

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Feb 14, 2007
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Hello, I'm thinking about buying a GTX 970. I have at the moment 2x460 GTX in SLI.

First question: Nvidia 400 series, and all before them if I recall correctly, ran hotter (due to higher clocks) when using 2 displays in the same card. This was due to a hardware issue or simply "by design". They couldn't use some power saving techniques like lowering the clocks to 130mhz when using 2 display outputs.

Is this still de case with GTX 970 series? I've found some people complaining about that, but only in MSI cards, so not sure if is the case with all GTX 970. Anyone driving 2 o 3 displays with one card see an increase in temps and clocks? For the record, my GTX 460 runs at 35º with 1 display, 60º with both displays. Just by enable them, not playing or anything.


Second question: All cards I've tested in the past have same issue when running something (game, desktop, whatever) on 2 displays in clone mode. Only one of them syncs correctly, meaning one of them always has some tearing. This is again supposed to be simply how cards and displays work. V-Sync can sync frames to match refresh rate for 1 display, but not for 2 at the same time, even if they are working with the same refresh rate. That sounds logic and I guess it's impossible to resolve. Any idea if they solved that somehow in new cards like GTX 970? If so, with any type of connectors? Never tried 2 display ports in clone mode. Might help?


Yeah, I know, kind of a perfectionist here, but this is Tom's Hardware right? hehehe
Any clue will be very appreciated, thanks.
 

hysteria357

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I don't have a 970 but I have a 980 (same architecture, Maxwell) and I can confirm that when I have dual monitors, my card does not clock down to 1XXmhz. Right now I have a single monitor, which I haven't had just one in a while, and I was shocked to see how low the idle temps were and how low the clock speeds go. Its not much of a practical difference though. Idle with the fans very low (EVGA version), single monitor runs about 30 degrees where the dual monitors run 40 degrees. Under load it is the same on both. Its not like Fermi where you have to worry about your house burning down.

Unfortunately I cannot answer your second question, as I do not run my dual monitors in clone mode. One of my monitors is 144hz and the other is 60hz.
 

_artanis_

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Ok many thanks, so first question is solved, it raises temps but not much. Even the models that shut down the fans below 60º should remain quiet using multiple displays.

Any clue on second question anyone?
 

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