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Does VSR utilize CrossfireX?

cageymaru

cageymaru

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Does VSR utilize CrossfireX? If it does, then will it use the second GPU to assist with the VSR load if the game doesn't support CrossfireX? Weird question. Just was wondering as the R9 290's are kinda cheap. :)
 
Yes, been catching up playing Dragon Age: Inquisition at 2560x1600 on a 1920x1200 screen and both cards are being used.

Edit: Afterburner shot
6Vx0MCa.jpg
 
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technically crossfireX is 3+ cards, but it appears he was asking about 2.

DAI is probobly a bad example, as it supports crossfire natively.
 
cageymaru said:
Does VSR utilize CrossfireX? If it does, then will it use the second GPU to assist with the VSR load if the game doesn't support CrossfireX? Weird question. Just was wondering as the R9 290's are kinda cheap. :)
Click to expand...

I am sure somebody with two cards can check this out. Of course, pretty obviously, it needs to be a game that doesn't have crossfire support,
 
Pretty sure the answer is no, if the OP is asking what I think he's asking.

cageymaru, I'm going to describe the situation as I think you're inquiring, and tell me if I'm reading you right. I have a 1920x1200 monitor, a pair of 290's and I'm playing a game that doesn't support Crossfire. 1920x1200 is 2,304,000 pixels, 2560x1600 is 4,096,000 pixels. You're wondering if, instead of doing actual Crossfire, VSR just leverages the power of the 2nd card to crunch those extra 1,792,000 pixels? Nope, doesn't work that way. What VSR basically does is open up resolution options beyond what your display is actually capable of, you can actually pick them for your Windows desktop too, not just in games(I just confirmed this, my 290X can now pick a desktop resolution up to 2560x1600, instead of the old max of 1920x1200). What actually happens in my case is my card renders the scene at 2560x1600, just like it would if my monitor actually supported that resolution. The image is then passed to the scaler hardware, which resizes it down to my monitor's native 1920x1200, just as it would scale up if I had selected a lower resolution like 1680x1050. The theory being, 2560x1600 is 1.78x as many pixels as 1920x1200, so the resulting image will be almost as good as if you'd applied 2x super-sample anti-aliasing. And the performance should be significantly faster than 2xSSAA, since the scaler hardware works faster than the portion of the GPU pipeline that would be doing the SSAA calculations. But the important part with regards to your question, as far as the GPU rendering is concerned, the "3D" part of the chip just thinks it's rendering to a higher-res screen, so all the normal rules for Crossfire etc. apply.
 
dewbak75 said:
Pretty sure the answer is no, if the OP is asking what I think he's asking.

cageymaru, I'm going to describe the situation as I think you're inquiring, and tell me if I'm reading you right. I have a 1920x1200 monitor, a pair of 290's and I'm playing a game that doesn't support Crossfire. 1920x1200 is 2,304,000 pixels, 2560x1600 is 4,096,000 pixels. You're wondering if, instead of doing actual Crossfire, VSR just leverages the power of the 2nd card to crunch those extra 1,792,000 pixels? Nope, doesn't work that way. What VSR basically does is open up resolution options beyond what your display is actually capable of, you can actually pick them for your Windows desktop too, not just in games(I just confirmed this, my 290X can now pick a desktop resolution up to 2560x1600, instead of the old max of 1920x1200). What actually happens in my case is my card renders the scene at 2560x1600, just like it would if my monitor actually supported that resolution. The image is then passed to the scaler hardware, which resizes it down to my monitor's native 1920x1200, just as it would scale up if I had selected a lower resolution like 1680x1050. The theory being, 2560x1600 is 1.78x as many pixels as 1920x1200, so the resulting image will be almost as good as if you'd applied 2x super-sample anti-aliasing. And the performance should be significantly faster than 2xSSAA, since the scaler hardware works faster than the portion of the GPU pipeline that would be doing the SSAA calculations. But the important part with regards to your question, as far as the GPU rendering is concerned, the "3D" part of the chip just thinks it's rendering to a higher-res screen, so all the normal rules for Crossfire etc. apply.
Click to expand...

Thank you! I was wondering just this scenario. A few of my older games start "choking" at 4K even though they shouldn't. Of course I doubt there is a Crossfire solution for them as they are old as sin. So I was trying to find a brute force method for handling it.

Thanks again.
 
Um I thought Brent said that VSR does support Crossfire on the Tonga (285) and 290X in the Omega Drive article. Gotta look back but I'm gonna log out for the night. I'll post back if I see something helpful.
 
A lot of people are being confused in this thread. A person above explained the situation well.

In simplest terms, vsr allows for higher resolutions, virtually created, to run on your monitor.
If a game supports cross fire, there is no reason why it would not work with vsr and cross fire.

The OP's question seemed to be, if a game does not support cross fire, will vsr cause the secondary gpu to work, helping with the down scaling. Here, the answer is no.
 
The Mac said:
technically crossfireX is 3+ cards, but it appears he was asking about 2.

DAI is probobly a bad example, as it supports crossfire natively.
Click to expand...

CrossfireX is the new name for it all, the name got changed when they started to use the ribbon and not the master and slave card, it also meant that they could use upto 4 GPUs but CrossfireX itself does not mean more than 2 GPUs, its not imperative that the term CrossfireX is used even today.

AMD CrossFire™ technology is the ultimate multi-GPU performance gaming platform. Unlocking game-dominating power, AMD CrossFire™ harnesses the power of two or more discrete graphics cards working in parallel to dramatically improve gaming performance.1 AMD CrossFire™ technology ready graphics cards fit practically every budget. With the flexibility to combine two, three or four GPUs, AMD CrossFire™ technology is the perfect solution for those who demand extreme performance.
Click to expand...
http://www.amd.com/en-us/innovations/software-technologies/technologies-gaming/crossfire

AMD CrossFireX™ is the ultimate multi-GPU performance gaming platform. Unlocking game-dominating power, AMD CrossFireX™ harnesses the power of two or more discrete graphics cards working in parallel to dramatically improve gaming performance. With Club 3D Radeon™ HD graphics cards ready for practically every budget and the flexibility to combine two, three or four GPUs, AMD CrossFireX™ multi-GPU technology is the perfect multi-GPU solution for those who demand the best.
Click to expand...
http://www.club-3d.com/index.php/products/reader.en/product/amd-crossfire-x-interconnect.html
 
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