Lossless scaling with second GPU RX6800 + AMD WX5100

[Percy1983]

I thought I would share my findings as it may be of useful to some.

So firstly lossless scaling is a frame gen and scaler program, its main advnatage it it works on pretty much any game (or video). But of course if you run it you take a hit on performance to then gain generated frames. It can now support using a second gpu to handle the frame gen so you don't lose performance on you original render.

So the search for a second GPU, I could chuck in my Vega 56 or an R9 290 but they are power hungry (my PSU could do it) so I decided to look at low power options, the general consensus is an RX6400 but I am not spending that much to which I came across the WX5100.

In short it is RX560 XT 8GB and I got it for £46. It comes out of the box with a 50w TDP.

So the most challenging game I have is Alan Wake 2 so I basically turned all settings to High/Ultra (Excluded ray tracing), patched in FSR3 using Optiscaler with a render resolution 2953x1661. Performance wise the game hovers around 31-34fps.

I lock the v sync to half rate so its a solid 30fps and enable lossless scalping on the WX5100... much to my disappointment its can't do it so i am getting weird warping effects etc, I move the scaler quality down to 70 (100 max) and it works ok and looks good.

No problem, edit the WX5100 bios to a 70w TDP (75w max) and move the clocks to 1200/1900.

Try again and have a locked 60fps in game with the WX5100 at 72-73% usage with the scaler set to 100 (best quality).

As a tech it works well, I can see a use for people with high refresh rate monitors, of course power draw, heat etc is a consideration.

With my board (X570) the RX6800 is now on 8x 4.0 which doesn't appear to be a problem and the WX5100 is at 8x 3.0 which is also fine but depending on boards etc its worth checking.

I mostly did this as a fact finding, geek wanting to know if it would work and overall I am happy with it and intended to leave the WX5100 in place.

Of course if anybody want me find its limits at different resolutions I am more than happy to test it out as it could work for many people as a low power single slot card.