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Fury random memory performance defect!

Question asked by smartbitcoin on Dec 15, 2015

Based on the amd sdk app3.0 ,  the global memory benchmark program from amd:

 

my test results shows:

 

fury 's  float4 random performace is

225.512 Gbps

225/512 = 44% of the peak bandwidth.

 

mean while , the  280x 's float4 random formance is

192.248 Gbps.

192/288 = 66% of the peak bandwidth.

 

Does this a driver bug or the 1st generation HBM defect?

 

the opencl drvier is 15.30.1025 , the latest one on ubuntu 14.04.

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