Originally Posted by skypine27
A quick scan of that link made it seem not relevant. It was talking an increase in clock speed / power consumption when the gpu(s) were in idle.
Who cares what they're sucking at idle? Unless I missed a part about the card(s) misbehaving under heavy gaming load?
I can offer some speculation.
fact 1: We do not know the cause of the scan lines other than that it appears when G-sync is turned on.
(Some folks originally reported that OC also needs to be ON on the monitor OSD but I think this has been disproved.)
fact 2: We know that running at higher refresh rates, closer to 100, reduces the scanlines.
fact 3: "The GPU needs to maintain a certain pixel clock in order to support the required bandwidth of a particular refresh rate"
fact 4: GPU tries to idle at 135Mhz for Desktop at 144Hz (for 2560x1400) but this refresh needs high pixel clocks. But pixel clock and Gpu clock are linked in the case of monitor with G-sync module. So GPU clock has to ramp up to 800+Mhz to support pixel clock and so sucks more power even when sitting at the Desktop. This is the "bug" --> Pixel and GPU clocks are linked.
This fact 4 applies to monitors with G-sync only going by that article. I don't know why. "Guess what? You were right! That new monitor (or you) exposed a bug in the way our GPU was managing clocks for GSYNC and very high refresh rates." says Nvidia
If you work backwards on the assumption
that scanlines are related to pixel clocks somehow: Gsync on --> variations in fps --> variations in refresh --> a given refresh requires a given pixel clock (fact3) but gpu clock is doing its own fluctuations based on load --> we see artifacts like scanlines. And since Gpu clock variation patterns differ from game to game, maybe that is why we don't see them in some games but see them in others. Maybe that is also why we don't see them at 100fps/hz (fact 2).One way to test this out would be force KBoost On or flash the GPU to a custom bios that can keep the gpu clocks constantly high without the GPUboost stuff. And see if scanlines go away.
I think precision X16 or AB allows you to increase pixel clock independently of the gpu clock or something like that. I read that on a post by someone who was trying to hit 100Hz on his X34 that would not go above 95Hz.
ALL speculation folks. Don't take my word for it. It's just a hypothesis. Maybe someone can test my hypotheis with Kboost or custom bios here. But don't get too hopeful either. (okay, maybe a little if the testing works)
EDIT: if you haven't played with custom bios yet be careful to do your research before proceeding. Do not do it lightlyEdited by Mountainlifter - 11/7/15 at 2:07am