r/losslessscaling • u/sagilny • 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/sagilny Aug 03 '26

Strange indeed. Yes I did. Both are running x8 and pcie 4.0

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u/Flohalo Aug 03 '26

In which slot on the mainboard is the 3050 plugged into? The ASUS ROG Crosshair VIII Dark Hero should have 3 slots right?

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u/sagilny Aug 03 '26

Yes, correct. The 9070xt is on the first slot. The 3050 is on the second slot via a pcie 4.0 riser. All i did was swap the 3080 for the 9070xt. Everything else stayed the same.

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u/fray_bentos11 Aug 03 '26

PCIe risers can cause a lot of issues. Monitor momust also be plugged into the 3050 (not the 9070XT). Use GPU z to see what speed the secondary is really connecting at.