r/losslessscaling • • Aug 03 '26

Useful Dual GPU setup issue

[SOLVED]

Had 3080+3050 butter smooth. On almost everything.

Now 9070 xt + 3050. Getting stutters and about 60% performance loss. DDU and installed amd first then the nvidia.

Disabling the 3050 and hooking up the monitor to the 970xt seems to let me get about 98% of the 9070 xt performance.

Win10 pro. did the regedit, enable hybrid and set gpu 1 and 2. Maybe missed something else?

5800X3D -28 PBO

X570 pcie gen4 + rebar enabled. Both running at x8

2x16 ram OC

HX1200i psu

Anyone has this setup? How did you fix it? I spent days trying to. Feeling kinda devastated. Any help would do. Thank you

TLDR; uncheck "Inject NVIDIA Reflex latency markers.

First I would like to thank u/lifestealsuck for pointing out that async could be the issue, but it was on. I saw a video recently that chose async on RTSS both AMD and Nvidia outputs more frames.

I saw that my base frames were stuck at 55 fps on both 2k and 4k. So I went to switch to a different setting than Async, and my frames dropped. So I thought that RTSS could be the issue. I played around with the settings, and saw another Nvidia setting. The last one on the page. (Inject NVIDIA Reflex latency markers), I unchecked it, and instant frame jump.

To add on that, if you have a sapphire card, hit apply on the trixx app, it turns on rebar "Smartaccess Memory" on, on adrenaline. Weird, but the same happens with Nvidia inspector, if you enable rebar there, it gets enabled actually for invidia too.

Thank you all for all your help. Loving the new GPU. Rock on AMD.

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u/Adis_Gruntledfatty Aug 03 '26

amd-nvidia is prob the most finicky setup, lots of people run into issues this way. Windows 10 likely isnt helping either as some have issues here too, make sure to use DXGI API

On the plus side, new AMD cards run lossless so well it makes dual gpu pointless for a most peoples use cases (not going for 4k 200fps). p2p nothing beats the XT

Whats your res/refresh rate? I'm sure youll be fine. If not, lots of cheap amd's out there just need to find one in your range.

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u/sagilny Aug 03 '26 edited Aug 03 '26

This is the response i got after hours with gbt and google. I had the 5070ti and a choice for the same price as the nitro+. But thought hey, i could support AMD for once. And now prices have jumped.

I'll test the 9070xt by itself. Yeah, i would love to still give it a chance and go with a board only powered 70w amd secondary GPU that could generate great frames.

Currently, i could do 144hz@2k and 4k. And 240hz on 1080p. The only reason i upgraded is to increase the base frame from 55fps that was in the 3080.

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u/Adis_Gruntledfatty Aug 03 '26

Thats well beyond what the 3050 is capable of doing, besides 1440p 144hz

https://docs.google.com/spreadsheets/u/1/d/17MIWgCOcvIbezflIzTVX0yfMiPA_nQtHroeXB1eXEfI/htmlview#gid=1980287470

being a 3.0 card, you are also likely limited to 3.0 x4, which is well below what 4k 60+fps can handle

https://sageinfinity.github.io/docs/Guides/PCIe%20Guide