By using this site, you agree to our Privacy Policy and our Terms of Use. Close
fatslob-:O on 29 March 2014
Edit Thread
Pemalite said:
fatslob-:O said:

Another conclusion that can be made is that even if the X1 only had 1 tessellator compared to the PS4 having possibly 2 tessellators their performance on tessellation factors of 16 and higher would likely be identical for the most part. A better idea of getting more detail rather than using tessellation on AMD GPUs is that passing a higher detailed polygon mesh would have less impact on performance even accounting for the extra calculations of the animations. As for the WII U it's probably using those awful evergreen tessellation engines as you can see from the charts above who's cards are 5770, 5870, and 6850 all of which have MUCH higher clocks than the latte which also diminishes it's already bad tessellation performance.

AMD's design is easily less elegant than nVidia's, I'm not sure if AMD is still using the GDDR5 memory to store the Tessellation data with Graphics Core Next like they did with VLIW4, but that would bring with it, it's own performance penalty. (Higher latency, lower bandwidth.)
If anything, the Xbox One could have the advantage over the Playstation 4 in that regard thanks to the eSRAM, but, we will only know for sure in time, it certainly won't make up for the shader, render output, texture mapping unit deficiencies though.

Essentially, AMD needs to do allot of work to "Load Balance" the geometry, which comes with it... A bunch of bottlenecks, nVidia's Polymoph is much more scalable.

Why would anyone want to store the generated vertex's ? The point of tessellation is to create more detail in a procedural way. The endless city demo wouldn't even be possible in the first place because of large memory overhead in storing over a billion triangles! Your reasons for tessellation being superior in the xbox one is wrong for the most part seeing as how the performance scales with CLOCKS which is quite pathetic on AMD's part. How in the hell does a 7870 kick's 7950 in the ass in tessmark ? This still means that even with the higher clocks the xbox one would only perform 5% better than the PS4 in tessmark and if we go to tess factors of under 16 the PS4 will most likely take it due to the fact that somehow their tessellators would actually respond to those factors. 

What AMD needs to seriously do is have a truly parallel solution otherwise it's going to be another embarrassing slaughter on the tessellation front.