Pathtracing actually does make a noticeable difference on the slide bar when comparing it to ultra with RT on or off. However, ultra doesn't seem to look any different with RT on or off.
You're right, but it's not just the Ampere cards doing worse than RDNA2 because both Ampere and Turing cards suffer a much larger percentage drop than either RDNA1 or RDNA2. It was a bit challenging because only 4 cards from each side appear on both charts, but I did a little math with them. One of the results is mind-boggling:
GeForce Cards:
RTX 2080 Ti 11GB: 55.9->38.8 (31%) - Turing
RTX 3060 12GB: 35.4->23.9 (-48%) - Ampere
RTX 3070 8GB: 57.0->38.4 (-33%) - Ampere
RTX 3080 10GB: 68.5->49.2 (-28%) - Ampere
Radeon Cards:
RX 5700 XT 8GB: 36.0->29.5 (-18%) - RDNA1
RX 6600 XT 8GB: 34.0-36.3 (+8%) - RDNA2
RX 6700 XT 12GB: 49.9->45.4 (-9%) - RDNA2
RX 6800 XT 16GB: 72.8->66.3 (-9%) - RDNA2
Initially, I compared the RTX 3080 with the RX 6800 XT because these two cards have been natural performance rivals within low single-digits of each other percentage-wise. Seeing the 28% drop in frames for the RTX 3080 but only 9% drop in frames for the RX 6800 XT was something that I didn't think should be possible. My first thought was that maybe it's because of the difference in VRAM so I checked the RTX 3060 vs. the RX 6700 XT since they both have 12GB. Clearly, I was wrong because the 6700 XT lost the same 9% as the 6800 XT but the 3060 lost a whopping 48% despite having more VRAM than the 3080. Then, just to blow my mind (I had to check that I did the numbers in the correct order), the RX 6600 XT actually
gains frames while
every other card loses frames.
I find CP2077 to be a pretty ironic game with respect to GPU performance because it's nVidia's biggest RT poster-child and crushes Radeons with its RT more than any other game out there. It's always the nvidia-favouring outlier when RT is turned on (especially when maxxed out). What's ironic is that when RT
isn't enabled, the game actually
prefers Radeon cards. IIRC,
Control was similar in this fashion although it no longer crushes Radeons like it once did (probably a new Radeon driver improved performance dramatically).
That's both insane and funny at the same time.