Question Someone Guru me on Dual GPU lossless scaling.

[aigomorla]

I am hearing this is the thing now.

I did some research and things still don't make sense.
So i am using the primary gpu for frame generation, and the secondary gpu for frame display.
Basically piggy backing.
Another confusing thing.
Some say you need the second card to be a workstation for it to work properly, as frame generation is better on work station cards like a A4000.

Here is some things thats confusing me.
Does the display GPU need to have power? Some people say you need a GPU able to keep display the initial quality settings but at a low FPS.
The second GPU needs to be strong enough to keep up with the primary GPU.

Another confusing thing.
Some people say i need to plug a display port cable from 1 card to another. (this reminds me of the OG voodoo2 SLI)
Others i dont see or hear anything like that.

Incase your absolutely new to this and want to learn with me:

I could use some guidance in this area.

 

[aigomorla]

So apparently this works on AMD APU's also.
I am trying to find new information, but its very limited.

Anyone know more in depth?

 

[igor_kavinski]

Wow. Multiple GPUs are gonna make a comeback, first with the PhysX thing and now this!

 

[aigomorla]

This is why i wanted to know more about.

The other videos ive seen always had mis matched GPU's, one which is drastically underpowered.
Another issue that arose is not enough pci-e lanes on the motherboard.

But i am wondering what happens if you pair 2 identical video cards, like for example, a 9070XT x 2.
Or does that even matter, as the secondary card is just pushing out frames, and not doing any of the real frame generation.

There is so much i dont understand that isn't being explained, that it feels like a earily 19th century traveling witch doctor trying to pander his snail oil, saying its the elixer of life.

 

[igor_kavinski]

I could do a quick test as long as it's some open source game that runs on Windows and isn't huge in size. If it can work with FFXV benchmark or Unigine Superposition, that's even better coz then I don't need to download anything.

I have two ARC A770's in my Epyc machine. I could test them out if you give me simple to follow instructions.

And if you are not sure, just give a brief explainer on what you have gleaned from your research so far and maybe I can move from there?

I'm surprised that it took this long for someone to come up with dual GPU usage in gaming after SLI, considering that there is explicit multi-GPU support in DX12, even dissimilar ones but game developers seem to have totally ignored that because let's face it, both AMD and Nvidia would not want game studios flaunting a feature where your game can run smoother with an additional cheaper card from the competitor.

 

[aigomorla]

I could test them out if you give me simple to follow instructions.

Thats why i made this thread... instructions too complicated, and my head goes 404 error.

@Shmee ... did you ever hear of this? I know you'd be interested as heck in it if it works.

 

[igor_kavinski]

Thats why i made this thread... instructions too complicated, and my head goes 404 error.

OK, now I'm very curious.

Read this: https://www.xda-developers.com/dual-gpu-setup-with-lossless-scaling/

And now, I'm not so curious and even turned off a bit because it's paid software and needs two cables running to the monitor (with nothing else explained in that article).

Seems the frame generation part doesn't really need a beefy GPU. Something like a 3060 12GB would do fine.

I have to agree. We need someone's objective opinion and a penchant for messing around.

@DAPUNISHER?

 

[DAPUNISHER]

Wow. Multiple GPUs are gonna make a comeback, first with the PhysX thing and now this!

Daniel-san tried it out with a 3060 and 1060. Time stamped -

 

[igor_kavinski]

Interesting. He didn't say anything about the requirement of two display cables to the monitor, though. Not sure about that. Do the cables just need to be plugged in and the primary GPU output needs to be the selected one on the monitor?

 

[DAPUNISHER]

Interesting. He didn't say anything about the requirement of two display cables to the monitor, though. Not sure about that. Do the cables just need to be plugged in and the primary GPU output needs to be the selected one on the monitor?

You just need the monitor connected to the card that is doing the LS/FG. You do not need both cards connected to the monitor.

 

[Shmee]

Hmm I have not heard of this. Do you have a link to their website or info?

 

[aigomorla]

Hmm I have not heard of this. Do you have a link to their website or info?

Very little at the moment.
I ran across it from luck trying to debug something on my TRX50.
But it seems like some people are using it on Ryzen's paired with the IGP.
And they are pulling crazy FPS... like FPS which would make even my 4090 cry in some titles.

 

[DAPUNISHER]

Very little at the moment.
I ran across it from luck trying to debug something on my TRX50.
But it seems like some people are using it on Ryzen's paired with the IGP.
And they are pulling crazy FPS... like FPS which would make even my 4090 cry in some titles.

Fake frames though. The latency is higher. Make certain the game is starting from at least 60fps before using frame generation. But yeah, it's cool stuff. I bought a slot powered 3050 6GB I intend to use as a PhysX and LSFG card in an upcoming build.

 

[darkswordsman17]

Since this was supposed to be a major tentpole feature of DX12, I never understood why gamers were fine with Nvidia and then AMD giving up on multi-GPU. Heck, I don't know why those companies gave up on it since I think that would have been the way to prep and develop chiplet GPU designs.

And it would've been good for VR where you could do per eye rendering, but again, Oculus and everyone else just shrugged at mGPU going away. People just handwaived that well it requires games to support it and that puts extra work on devs, but hey they seemed fine with that with the lameduck ray-tracing and other stuff that kept making performance worse in games. New graphics rendering techniques that supposedly make developing games easier but in process tanks performance? That's cool, no reason for multi-GPU! Years long gaps between new GPU generations, with people desperate for more GPU? Who needs mGPU, just pay more and more for ever more ridiculous Nvidia largest GPU.

I don't get it. I don't understand why AMD wasn't still pushing this the whole time other than they're stuck just doing whatever Nvidia does. Doubly so since they were so intent on moving to GPU chiplets. And then Intel who was trying to disrupt the industry with modest GPUs didn't even try either. Granted, that would've added even more headaches for their software team, but at least it could've made a splash and might have made the hopium with which the PC hardware reveiwers were begging people to buy Intel GPUs.

 

[DAPUNISHER]

Fabio shows how to use it. As he discovers the LSFG card is the one you need the monitor connected to. He shows the settings in windows to use to have the faster card play the game time stamped -

 

[maddie]

Fabio shows how to use it. As he discovers the LSFG card is the one you need the monitor connected to. He shows the settings in windows to use to have the faster card play the game time stamped -

A.....nnn....d there goes any hope of GPU price declines.

 

[DAPUNISHER]

A.....nnn....d there goes any hope of GPU price declines.

I picked up a 3050 6GB open box for $140 in anticipation of lower end cards seeing increased demand. 32bit PhysX is the other use case. Some use ARC as a second GPU for media capabilities. A310 seems popular for that.