Has anyone OTHER than the OP actually tried this yet and got a positive result?
I would LOVE to know that this works, but it would be kind of nice to have more than just one person saying that it works. I have been waiting for this feature for so long… hate to think that we are being trolled (or maybe OP was actually using DX11 SLI by mistake, etc)
Interesting. Does this work when pairing an integrated GPU (such as those on many Intel CPUs and AMD APUs) with a discrete GPU? If so, that’s huge, because there’s a ton of integrated GPUs out there sitting in systems doing absolutely nothing. It’d be great to leverage them to squeeze out a few extra frames.
DX12 Explicit Multi-GPU does work with different brands and GPUs that have mismatched performance, so it “should” work with an integrated GPU. But until we see more data, from people actually testing it, we really don’t know what it will do in practice.
how do i activate this? i have a gtx 1070 and a vega 56, both working in my system
I doubt it would, because most PC systems, the bios and/or windows essentially flips the switch on if your system uses integrated or discrete graphics, so essentially tends to disable one to when the other is activated as far as I am aware?
So am not sure how to tell your system to run both integrated and discrete at the same time?
There is no activation step, if it’s working it should just work. I never got to test or try out an amd and nvidia card, but if you have them both installed on your computer (drivers, etc), to see if it’s working, try logging into wow with only 1, check your average frame rate… then repeat the process with the 2 cards, and see if there’s a bump in framerate.
Also maybe try swaping the position of the cards, i.e. 1070 in the top pci-e slot with your monitor plugged into it for the first test, then the vega card in the top slot with your monitor plugged into it, and see which order, if any, gives a performance bump
And if the hardware side of things doesn’t see a difference, as a last resort can go to advanced settings, and for graphic card instead of auto detect, set it to either the 1070 or the vega (whichever is in the second/lower pci-e slot, regardless if your monitor is plugged into the other card) and see if that makes a diff to performance (Note: this method may not be as smooth of a performance uplift as if i remember correctly back when i use to SLI back in the dx11 days, it may cause some micro stutter)
It might vary by motherboard. I’m not in a position to test it right now but IIRC my old 6700k tower with a decent Gigabyte motherboard let you select the primary GPU so the boot screen would show up correctly and all that, but would also let you hook up a second monitor to the integrated HDMI port and have both work at once.
At the very least, systems with dGPUs can take advantage of Intel iGPUs with QuickSync, so it’s not being turned off entirely in the presence of a dGPU.
If they’re rocking dual 3090s, they’re doing a lot more with their computer than WoW.
Had I the cash right now, I would be rolling 3090s in SLi. Unfortunately, I have neither the cash or the desktop computer to put them in.
Well, usually the option in the BIOS will specify which GPU the system should boot from. If you select the discrete GPU, then in many cases the integrated GPU will be disabled automatically. If you select the integrated GPU, then that will be the display output that gets used when you first boot up the computer, but your discrete GPU will still be there also. Once in Windows, you will have control over which GPU you use, independent of what is set in your BIOS.
Soon™…
Only if a certain less than esteemed idjit from San Francisco stops trying to stuff pork into the stimulus bill so that the upper chamber will pass it.
Otherwise, I’m stuck on a tiny fixed VA income (permanently disabled Afghan vet). Had a nice desktop computer, but had a house fire followed by a burgling.
Ooh I can finally plug my old Nvidia GPU into this PC.
How old is it?
Strange time to support SLI just as everyone else is dumping it, especially in a game like WoW
Explicit Multi-GPU has nothing to do with SLI. SLI and crossfire were multi-GPU technologies handled at the GPU driver level. Support for SLI and Crossfire ended with DirectX 11. In DirectX 12, Multi-GPU support is handled by the game itself. This is called DX12 Explicit Multi-GPU.
As far as traditional SLI and Crossfire, WoW has supported it just fine for at least a dozen years, and it still does when using DirectX 11.
GTX 750Ti. So not that old, but fairly old. I think it should support DX12.
Depending on what you’re pairing it with, and it’s age to performance… makes me wonder what kind of performance uplift you may see if any… but i guess you’ll have to try it out to see if any noticeable difference.
Furthermore, the 750 Ti does not support the DirectX 12 feature set. It can take advantage of some of the CPU optimization APIs, but as far as I am aware the 900 series and up are the only Nvidia cards that are officially DirectX 12 cards.
That’s a shame. However, I am getting 60 FPS in most cases on almost 4k. Was just curious if it would give me a boost.
if you havent tried, may as well give it a shot. wont hurt to try to see if it does give a boost or not.
Tried with a GTX 1080 & GTX 980, doesn’t work at all. In game i can choose either of the 2 cards but only 1 will be utilize at all while the another is idling .