So I've noticed that with this last generation of cards (Pascal), there have been lots of cries about the death of SLI and how it's not worth the money/trouble. I've never been one of these people. I've always had a good experience with SLI, not perfect and not everything was supported, but for the most part, I've always enjoyed SLI and noticed a nice performance bump in most games I play. That said, my last experience with SLI was with 2 980ti's which overall, worked very well.
Fast forward to today, I've been using a Titan Xp for the last 9 months or so and this last week I grabbed a 2nd Titan Xp as I came across a good deal. After getting everything set up, I ran the usual set of benchmarks (Valley, Heaven and Firestrike) and everything looked good score wise. (Firestrike Extreme was around 20.5K). I loaded up a couple games however and I noticed that my FPS were really not that much different from my single Xp. But I noticed my GPU utilization was like only 70-75% on GPU 1 and maybe 80-85% on GPU 2. After much googling, I've come across a complaint that G-sync and Pascal SLI cards don't seem to work well together. With G-sync enabled it diminishes the GPU load by a noticeable bit. Sure enough, I disabled G-sync, fired up Witcher 3 and lo and behold, both my GPUS were around 98-99% load and my FPS rose by about 30 FPS.
I'm using an Acer Predator X34 by the way.
Apparently this is a known issue for the last couple years and Nvidia has acknowledged it but has not found a fix. So now I'm a little disappointed that I either have to play with G sync off, or disable 1 of the cards (which obviously defeats the point of SLI). Lame that Nvidia can't get their own technologies to work well with each.
Anyone else run into this? What would you recommend? Sell, the 2nd Titan Xp and just go back to 1 card? Get a new monitor that doesn't have G-sync (what else is out there that's around the same size?).
Anyway, I think I'm now going to have to apply for membership into the "SLI sucks" camp.
Pic of rig.
Fast forward to today, I've been using a Titan Xp for the last 9 months or so and this last week I grabbed a 2nd Titan Xp as I came across a good deal. After getting everything set up, I ran the usual set of benchmarks (Valley, Heaven and Firestrike) and everything looked good score wise. (Firestrike Extreme was around 20.5K). I loaded up a couple games however and I noticed that my FPS were really not that much different from my single Xp. But I noticed my GPU utilization was like only 70-75% on GPU 1 and maybe 80-85% on GPU 2. After much googling, I've come across a complaint that G-sync and Pascal SLI cards don't seem to work well together. With G-sync enabled it diminishes the GPU load by a noticeable bit. Sure enough, I disabled G-sync, fired up Witcher 3 and lo and behold, both my GPUS were around 98-99% load and my FPS rose by about 30 FPS.
I'm using an Acer Predator X34 by the way.
Apparently this is a known issue for the last couple years and Nvidia has acknowledged it but has not found a fix. So now I'm a little disappointed that I either have to play with G sync off, or disable 1 of the cards (which obviously defeats the point of SLI). Lame that Nvidia can't get their own technologies to work well with each.
Anyone else run into this? What would you recommend? Sell, the 2nd Titan Xp and just go back to 1 card? Get a new monitor that doesn't have G-sync (what else is out there that's around the same size?).
Anyway, I think I'm now going to have to apply for membership into the "SLI sucks" camp.
Pic of rig.
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