Quote Originally Posted by Gautam View Post
It doesn't sit well with me for lower memory utilization and HT being disabled in the name of higher GFLOPS.
Higher memory usage actually seems beneficial to higher GFlops. It is supposed to be a stress test primarily and therefore using HT with it's lower result in GFlops is the right way IMO simply because it uses more power / generates more heat. At least in my tests it has. Typically my 860 with Linpack will run ~15% slower but use ~10% more power while using 8 threads over using 4 threads on separate physical cores with HT still enabled. IMO though it's also nice to know what sort of performance can be expected which is difficult if the resulting GFlops are skewed by bugs.


One thing i did find is that if OC'ing from Windows there is a possibility of wrong readings depending on the timer used which can result in lower than real readings when BCLK is increased. Rather than have an example showing lower clocks it is more obvious reducing BCLK as this will result in higher than real GFlops.

Example of incorrect reading using dual core with HT. BCLK dropped from 100MHz to 50MHz. In case your wondering, no I don't normally run the memory clock or BCLK that low .


Normally at 4.5GHz this dual core would be a little under 30GFlops.