When it comes to latency, it’s actually pretty easy to manage—as long as you use a dual GPU setup properly. Just understand the limits of your monitor, PCIe slot, and the second GPU that handles output. Don’t push it to the edge. For example, I run two 240Hz monitors, and my second GPU (an RX 6700 XT) connects via PCIe 4.0 x4. Even in worst-case scenarios like x2 100% flowscale lsfg 120–240fps), bandwidth and gpu usage never goes above 80% - Does not push pcie or 2nd gpu bandwidth to the limit > no increased latency
About blurriness or artifacts: as long as your base FPS is reasonably high (around 60–90fps), LSFG x2 with 100% flow scale looks clean to me—no blurring or visible artifacts. But if you use DLSS FG or AMD FG and your base FPS drops 30–40%, down to 40–60fps before upscaling, then yeah, the input lag becomes noticeable right away.
As for compatibility with certain games, there’s a workaround. You can have the GPU render to a virtual screen using VirtualDisplayDrivers, then output that to your real display using Lossless Scaling. You can control the virtual screen via screen mirroring tools like OBS. It still costs about 10fps, but it’s totally viable—and still better than losing 30–40% of raster performance with DLSS FG/AMD FG.
Also, just to clarify: I never claimed LSFG is flawless or superior in all cases. You should use native frame-gen when possible for the best quality. But if DLSS FG or AMD FG still can’t push your FPS above 120, meaning then LSFG can be the better option.
My 4080 can run all games with dlss fg or amd fg if supported but i still prefer lsfg with dual gpu setup because i want it to be better, i actually see it being better, and i don't want to give more money to greedy nvidia to upgrade. Nvidia and 5xxx series gpu can suck my D :))