New benchmark

[mboeller]

Are you going by tEd's scores you quoted above? Then 118.81 / 14.97 = 7.94, so I'd say it's pretty darn good. I would worry about the missing percent.

Hmmm......

So HyperZ is working rather perfect with FtB-sorting, but then what about the overall efficiency of the X850XT-PE or any other chip using this benchmark????

The X850XT-PE has an fillrate of 8320 MPixel/sec. One Frame at 1024x768 needs an fillrate of 0,786 MPixel, so the X850 should be able to render 10579 frames / sec due to the nearly perfect working HyperZ with FtB-sorting, but renders only 430,84 fps with FtB-sorting and 8x overdraw.

So the efficiency using this benchmark is only ~ 4%

Even if we take into account that the X850 can only output maybe 8 Pixels/cycle and not the full 16 Pixel/cycle the mystery remains for me.

So what's going on here?


Manfred

 

[fellix]

Hmm, I was left with impression that on R4xx every pixel quad has it's own HyperZ module in contrary to R3xx, where HZ was working for all quads at once, so disabling a quad would not hurt so much.
Someone to correct my ignorance if there is such.

 

[Dave Baumann]

Actually, I believe it was the case that both R420 and R300 have the HeirZ buffer attributed to a quad - they did, however, need to turn it all of with R300 when disabling one quad, butnot with R420.

 

[Humus]

The X850XT-PE has an fillrate of 8320 MPixel/sec. One Frame at 1024x768 needs an fillrate of 0,786 MPixel, so the X850 should be able to render 10579 frames / sec due to the nearly perfect working HyperZ with FtB-sorting, but renders only 430,84 fps with FtB-sorting and 8x overdraw.

Is that with the simple or the complex shader? I'm getting 2479 fps in the simple shader.

 

[mboeller]

The X850XT-PE has an fillrate of 8320 MPixel/sec. One Frame at 1024x768 needs an fillrate of 0,786 MPixel, so the X850 should be able to render 10579 frames / sec due to the nearly perfect working HyperZ with FtB-sorting, but renders only 430,84 fps with FtB-sorting and 8x overdraw.

Is that with the simple or the complex shader? I'm getting 2479 fps in the simple shader.

With the complex shader; so thats the reason for the low fps. THANKS!

What card / chip did You use?


Manfred

 

[Humus]

X850 XT