Proving 5090 RT claim is nonsensical
MLID's 5090 RT perf claim looks like flawed extrapolation perf from the 6-12X RT uplift internal estimate by Sony. Could be based on a game selection from medium RT to heavy RT and PT. PS5 anemic RT is already a joke.
Let's illustrate why the 5090 RT claim is not true or accurate. This is based on raw specs and clocks, PS5 performs better in reality due to low level (bare metal) optimizations and leaner OS. I know this math is far from perfect but it gives a pretty good idea. In TPU's GPU database the 6700XT roughly ~20% stronger in RT than a 6700. Clocks ~10% higher than PS5 in games so let's add that. Now the RX 6700XT is ~33% stronger than the PS5 GPU. RDNA3 didn't push RT vs RDNA2. RT on vs off drop marginally better than RDNA 2 which is why this comparison is possible based on raster numbers.
Let's see how 6700XT and 7900XTX compares in RT here across TPU's test game suite at 1440p (4K useless due to 12GB VRAM):
https://www.techpowerup.com/review/gpu-test-system-update-for-2025/3.html.
The RX 7900 XTX has a 2.44X advantage vs 6700XT. Multiply by 1.33 and it's 3.25X faster across these games.
RX 9070 XT from this review
https://www.techpowerup.com/review/sapphire-radeon-rx-9070-xt-pulse/37.html is +15% vs 7900XTX or 3.7X faster than PS5. If we assume PS6 has excellent RT and despite weaker core can match 4080-5080 in RT then we get 4.5-4.8X gain over PS5.
But remember that in TPU's RT game suite the 5090 is 1.92X ahead of 9070XT or 7.17X faster than PS5. Note that these workloads are not PT but RT games so the raster/RT ratio will shift a lot for PT games. But you can't have a PS5 GPU with roughly half the raster perf (~9070 raster) of a 5090 match it in RT games where a ton of the rendering pipeline is raster. Again flawed math.
RDNA4 is different though and in PT games the RX 9070 XT manages a 30-50% performance lead over the RX 7900 XTX. That's ~4-5X ahead of the PS5. But remember that NVIDIA completely smokes AMD cards in PT games. In PT games the lead a 5070 TI has over a 9070XT can be anywhere from 1.5-2X as seen in HUB's 9070 XT review. The RTX 5080 is also 1.81X stronger than 9070 XT in Doom TDA with PT enabled. source:
https://medium.com/@opinali/doom-path-tracing-and-bechmarks-d676939976e8. Extrapolating 9070 XT vs 5070 TI gives a ~1.5X NVIDIA advantage.
If we now compare 5070 TI with 7900XTX in Black Myth Wukong and Alan Wake 2 (4K Q upscale = 1440p internal res) we get a 2.6X and 3.4X speedup. 3.25 x 2.6-3.4 = 8.45-11.05X faster than PS5.
Let's add the differential up to 5080 and we get 10.14-13.6.
Based on this it sounds like PS6 could exceed NVIDIA Blackwell on the RT front but 6-12X doesn't result in 5090 PT perf, it results in 5070 TI-5080 PT perf. If true that's still impressive as it implies the PS6 per core will offset the overall weaker raster performance with stronger RT performance. But then again IIRC Kepler said RDNA5's RT feature set exceeds that of the 50 series so this markes a lot of sense.
But please ignore MLID's sensational 5090 RT claim.