Forum > GPU crunching
GTX 460 superclocked
Raistmer:
Some counts DDR and some not? ...
Ghost0210:
--- Quote from: Raistmer on 22 Aug 2010, 10:37:36 am ---Some counts DDR and some not? ...
--- End quote ---
not a clue :-\, I've just put it down to one of nVidia's little quirks
Kinda of like Boinc reading it at 570 Gflops one day and 850 the next
Jason G:
--- Quote from: Raistmer on 22 Aug 2010, 10:04:16 am ---warp size remains same so the number of truly simultaneous threads.
Also, why so big downgrade in freq ???
--- End quote ---
The warp size has stayed the same, but is capable of super-scalar execution with additional execution units, for ~50% greater throughput, so = 48 threads, but treat them as 32. That is extra compute units providing instruction level parallelism ( as was introduced in Intel CPUs with the Pentium Processor).
The way clocks are reported & used in the architecture has changed, from two separate clocks to 1 core clock.
The clock change is a significant one that will influence anything that tries to read clock frequencies. The extra superscalar execution one boosts Cuda-Core performance by ~50% but will look like the chip has less processors :D. In both cases they are optimisations for increased throughput, the core change being super-scalar fairly obvious but confusing at the same time ;D, The clock one because the hardware is used as a poly-morph engine, so needs to be synchronised to the shaders (Less obvious, more confusing at the same time)
Raistmer:
Good news - then I may hope NV will like float4 too as ATI does :)
[and it will save OpenCL kernels from rewriting for NV ]
Jason G:
--- Quote from: Raistmer on 22 Aug 2010, 11:48:27 am ---Good news - then I may hope NV will like float4 too as ATI does :)
[and it will save OpenCL kernels from rewriting for NV ]
--- End quote ---
Yes, though when it comes to that you may need to be backporting some of my experimental code, so don't get too complacent there :P
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