Yep, 773s sounds good for that ATI.Originally Posted by p2501
Although we optimized for ATIs, I'm not completely sure why but they perform a bit slower than NVIDIA cards with the current implementation.
Taking a look to ATI Stream's profiler I see a lot of SIMD registers being flushed for secondary rays ( which are very incoherent ). That, combined with the lack of DMA support in the ATI OpenCL SDK v2.2 and the incapacity to execute the SKA profiling Tool(my kernels just crashes it) probably makes them a bit slower compared with NVIDIA cards.
Anybody tested a 68XX, pls? I've heard they are using 4D VLWI instead of 5-VLWI so less registers will be flushed and the performance could be a bit better.
Btw, I think for the next version we're gonna low a bit the benchmark's default settings to complete the test sightly faster ( and we'll try to perform several optimizations we have in mind also ).
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