are kernels <<<2*N,32>>> and <<<N,64>>> the same for speed ?

are kernels <<<2*N,32>>> and <<<N,64>>> the same for speed ?

Typically, they are very close. Sometimes, they will be ~10-15% different. See [url=“http://forums.nvidia.com/index.php?s=&showtopic=88437&view=findpost&p=500384”]http://forums.nvidia.com/index.php?s=&...st&p=500384[/url] for more extensive posts on this subject.