@pc_rocks said:
@Zero_epyon said:
@pc_rocks said:
Again factually false and cherry picking workloads that don't stress CUs. If higher clocks are a substitute of more SM/CUs as Cerny claimed then none of the top GPUs have more cores and less clocks which is generally the case in PCs. Apart from pixel rate none of the graphics workloads scale well with clocks over cores. It's baffling that suddenly Cerny and cows know more about GPUs then Nvidia + AMD combined with decades of designing GPUs.
Lighting, RT, Geometry/Tessellation, Geometry culling all scale well on cores, especially RT which is also significantly heavy on bandwidth. Another disadvantage of higher clocks over core count is latency/access time for memory. In other words higher clocks over more cores needs even higher memory bandwidth which PS5 already has less.
Sure if you didn't like the games in the first video and the ones tested here: https://www.pcgamesn.com/amd/radeon-rx-5700-unlock-overclock-undervolt then check out the one above that uses games like RDR2, FH4, Tomb Raider, and Witcher 3.
An overclocked morepowertool edited 5700 can perform as well or perform better than a stock 5700 XT with extra CU counts. This has been common knowledge since last year amongst PC enthusiasts. Also, as Richard from DF states, oveclocking memory on AMD cards doesn't always translate into a significant boost to performance. In his test, he overclocked the memory by 9% but got back a 1% difference in performance.
Again missing the point. Let me break it down:
1. 5700 vs XT isn't a good comparison for PS5 vs XSX. One has just a difference of 4 CUs while the other has 16.
2. In the video you posted the games are running at 2K or 1080p, can't really tell but definitely not at 4K and definitely not at max performance. Once you have enough head room due to low resolution it won't show you much difference. This can be confirmed from the lowest FPS differential.
3. The better comparison would be 7970XT with 7870 OC or something like that. I forgot the actual two models but the OC version has higher TFLOPs but lower CUs and it didn't perform well in games.
4. Add RT and the difference will be higher. Also, pretty sure Richard didn't test the RT's effect on memory bandwidth. Regardless, at higher clocks with less cores memory becomes a bottleneck.
5. Lastly, if Cerny is such a genius on why higher clocks are better then do tell why Nvidia and AMD for their flagship GPUs have more cores and faster memory over clocks. Suddenly Cerny knows more about the actual creators of GPUs.
1. As I said to @regnaston earlier, I'm not saying that the clock nullifies the difference, but that the difference won't be as larger as people expect.
2. You are correct that it's 1440p. I thought it was 4K. However, the first video I posted shows little differences between the 4K modes in those games, including games like Metro Exodus. If that doesn't convince you then you're free to do so.
3. That comparison isn't better though. The 7970 had an extra GB of Ram than the 7870 XT. The 5700 and 5700 XT are identical enough that the VBios for the 5700 XT can be installed on the 5700 and work well. I'm not sure the same could be done with the 7000 cards. The 5700 XT and 5700 also share the same memory size, bandwidth, and bus sizes. I couldn't find any benchmarks but I'd imagine the 1 GB memory difference would play a big factor in performance.
4. He couldn't. The 5700 doesn't have dedicated RT hardware like RDNA 2 is supposed to have. So the Jury is still out on that one, but if it's supposed to be more beneficial to have for CUs then it is what it is. Again, not arguing that there will be no difference, just that it won't be as pronounced as some expect.
5. If these leaks are real, Navi 21 XT will have a boost clock of 2.4Ghz, just a bit higher than the PS5's boost clock along with what you said. I'm sure cost was a factor in going with the memory speeds but I can't speak for Cerny. https://technosports.co.in/2020/10/19/the-leak-of-amd-navi-21-gpu-is-one-the-biggest-flex-we-have-seen-in-2020/#:~:text=The%20veteran%20tech%20leaker%20Rogaine,of%20up%20to%202.4GHz.
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