Just upgraded my gtx980 to 2x SLI, two identical PNY cards. both work perfectly stand alone, and SLI works, but only in 2D as follows:
SLI enabled NCP
If the 3D set up window has '3D enabled' box unchecked, games run in SLI. But if '3D enabled' is checked, games run single card, even though I'm running the game in 2D. It's as though checking the 3D box in control panel disables SLI same as the ' SLI enabled' botton under ' configure SLI' .
All the status boxes/utilities report SLI engaged in all cases, but in fact SLI is not engaged if '3D enabled' is checked.
Is this normal? Does SLI kick in only in 2D? Or does SLI simply not work in 3D by design?
Just upgraded my gtx980 to 2x SLI, two identical PNY cards. both work perfectly stand alone, and SLI works, but only in 2D as follows:
SLI enabled NCP
If the 3D set up window has '3D enabled' box unchecked, games run in SLI. But if '3D enabled' is checked, games run single card, even though I'm running the game in 2D. It's as though checking the 3D box in control panel disables SLI same as the ' SLI enabled' botton under ' configure SLI' .
All the status boxes/utilities report SLI engaged in all cases, but in fact SLI is not engaged if '3D enabled' is checked.
Is this normal? Does SLI kick in only in 2D? Or does SLI simply not work in 3D by design?
It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.
It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.
[quote="mike_ar69"]It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.[/quote]
1. So you have the "3D enabled" box checked under your 'set up 3D', and you get SLI performance in both 2D and 3D gaming?
I've tried clean install with all different drivers, and on two different boot partitions. The problem remains.
This goes beyond SLI not working in 3D. SLI doesn't work in 2D or 3D if the '3D' box is checked even though I'm running my game in 2D. In my case the '3D enabled' box does precisely what the 'SLI enabled' box does.
Also, Crysis 3 runs in 3D/SLI with the Crysis 3 native SBS mode, so it follows the same rule as above.
mike_ar69 said:It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.
1. So you have the "3D enabled" box checked under your 'set up 3D', and you get SLI performance in both 2D and 3D gaming?
I've tried clean install with all different drivers, and on two different boot partitions. The problem remains.
This goes beyond SLI not working in 3D. SLI doesn't work in 2D or 3D if the '3D' box is checked even though I'm running my game in 2D. In my case the '3D enabled' box does precisely what the 'SLI enabled' box does.
Also, Crysis 3 runs in 3D/SLI with the Crysis 3 native SBS mode, so it follows the same rule as above.
[quote="roller11"][quote="mike_ar69"]It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.[/quote]
1. So you have the "3D enabled" box checked under your 'set up 3D', and you get SLI performance in both 2D and 3D gaming?
I've tried clean install with all different drivers, and on two different boot partitions. The problem remains.
This goes beyond SLI not working in 3D. SLI doesn't work in 2D or 3D if the '3D' box is checked even though I'm running my game in 2D. In my case the '3D enabled' box does precisely what the 'SLI enabled' box does.
Also, Crysis 3 runs in 3D/SLI with the Crysis 3 native SBS mode, so it follows the same rule as above.[/quote]
Yes I have 3D enabled. I use Nvidia Inspector to monitor GPU Usage and have both cards being utilized. I guess I can run a couple of benchmarks to verify in-game FPS improvement, though I already did this using 3DMark when I got the cards - I compared single and SLI 770 to single and SLI 980 and all the results scaled in SLI appropriately.
mike_ar69 said:It *should* work, I have SLI 980 at the moment and it runs in 3D and 2D fine. Do a clean driver installation if you have not already done so, and perhaps use DDU to really make sure old drivers are removed first.
1. So you have the "3D enabled" box checked under your 'set up 3D', and you get SLI performance in both 2D and 3D gaming?
I've tried clean install with all different drivers, and on two different boot partitions. The problem remains.
This goes beyond SLI not working in 3D. SLI doesn't work in 2D or 3D if the '3D' box is checked even though I'm running my game in 2D. In my case the '3D enabled' box does precisely what the 'SLI enabled' box does.
Also, Crysis 3 runs in 3D/SLI with the Crysis 3 native SBS mode, so it follows the same rule as above.
Yes I have 3D enabled. I use Nvidia Inspector to monitor GPU Usage and have both cards being utilized. I guess I can run a couple of benchmarks to verify in-game FPS improvement, though I already did this using 3DMark when I got the cards - I compared single and SLI 770 to single and SLI 980 and all the results scaled in SLI appropriately.
Never mind, I figured it out, (sorta). Fix was the obvious, leave "enable 3D" unchecked. I assumed it had to be checked, but my origin game ran in 3D/sli with the 3D box unchecked. I need the box checked for 3D blu rays, but that won't be a problem cause SLI is unnecessary, SLI needed only for games.
Thanks again for the help.
Never mind, I figured it out, (sorta). Fix was the obvious, leave "enable 3D" unchecked. I assumed it had to be checked, but my origin game ran in 3D/sli with the 3D box unchecked. I need the box checked for 3D blu rays, but that won't be a problem cause SLI is unnecessary, SLI needed only for games.
That's only going to work on a very small subset of games that have a native renderer like Crysis 3. A better test case will be one of the Batman games.
In general, we have historically had good scaling with SLI. Latest drivers seem to be a lot worse, and I'm not sure if they maybe haven't broken SLI altogether recently. I see some funny non-scaling in scenarios that suggests both cards are showing as active when measured, but actually not making things faster.
I agree with Mike_ar69 though- first step is fully clean driver install using DDU. Your situation is not normal.
That's only going to work on a very small subset of games that have a native renderer like Crysis 3. A better test case will be one of the Batman games.
In general, we have historically had good scaling with SLI. Latest drivers seem to be a lot worse, and I'm not sure if they maybe haven't broken SLI altogether recently. I see some funny non-scaling in scenarios that suggests both cards are showing as active when measured, but actually not making things faster.
I agree with Mike_ar69 though- first step is fully clean driver install using DDU. Your situation is not normal.
Acer H5360 (1280x720@120Hz) - ASUS VG248QE with GSync mod - 3D Vision 1&2 - Driver 372.54
GTX 970 - i5-4670K@4.2GHz - 12GB RAM - Win7x64+evilKB2670838 - 4 Disk X25 RAID
SAGER NP9870-S - GTX 980 - i7-6700K - Win10 Pro 1607 Latest 3Dmigoto Release Bo3b's School for ShaderHackers
Same issue here. With extensive testing.
https://forums.geforce.com/default/topic/820543/nvidia-surround/3d-surround-with-2-way-sli-yields-no-performance-increase-whatsoever-/
SLI enabled NCP
If the 3D set up window has '3D enabled' box unchecked, games run in SLI. But if '3D enabled' is checked, games run single card, even though I'm running the game in 2D. It's as though checking the 3D box in control panel disables SLI same as the ' SLI enabled' botton under ' configure SLI' .
All the status boxes/utilities report SLI engaged in all cases, but in fact SLI is not engaged if '3D enabled' is checked.
Is this normal? Does SLI kick in only in 2D? Or does SLI simply not work in 3D by design?
Rig: Intel i7-8700K @4.7GHz, 16Gb Ram, SSD, GTX 1080Ti, Win10x64, Asus VG278
1. So you have the "3D enabled" box checked under your 'set up 3D', and you get SLI performance in both 2D and 3D gaming?
I've tried clean install with all different drivers, and on two different boot partitions. The problem remains.
This goes beyond SLI not working in 3D. SLI doesn't work in 2D or 3D if the '3D' box is checked even though I'm running my game in 2D. In my case the '3D enabled' box does precisely what the 'SLI enabled' box does.
Also, Crysis 3 runs in 3D/SLI with the Crysis 3 native SBS mode, so it follows the same rule as above.
Yes I have 3D enabled. I use Nvidia Inspector to monitor GPU Usage and have both cards being utilized. I guess I can run a couple of benchmarks to verify in-game FPS improvement, though I already did this using 3DMark when I got the cards - I compared single and SLI 770 to single and SLI 980 and all the results scaled in SLI appropriately.
Rig: Intel i7-8700K @4.7GHz, 16Gb Ram, SSD, GTX 1080Ti, Win10x64, Asus VG278
Thanks again for the help.
In general, we have historically had good scaling with SLI. Latest drivers seem to be a lot worse, and I'm not sure if they maybe haven't broken SLI altogether recently. I see some funny non-scaling in scenarios that suggests both cards are showing as active when measured, but actually not making things faster.
I agree with Mike_ar69 though- first step is fully clean driver install using DDU. Your situation is not normal.
Acer H5360 (1280x720@120Hz) - ASUS VG248QE with GSync mod - 3D Vision 1&2 - Driver 372.54
GTX 970 - i5-4670K@4.2GHz - 12GB RAM - Win7x64+evilKB2670838 - 4 Disk X25 RAID
SAGER NP9870-S - GTX 980 - i7-6700K - Win10 Pro 1607
Latest 3Dmigoto Release
Bo3b's School for ShaderHackers
https://forums.geforce.com/default/topic/820543/nvidia-surround/3d-surround-with-2-way-sli-yields-no-performance-increase-whatsoever-/