Originally Posted by GingerJohn
Originally Posted by Bal3Wolf
you get gpu usage in the 90s right the 7900s max out gpu usage at 85% or lower no matter how many tasks my runs 83% then drops to 75% and goes back to 83%
So basically either
1. POEM isn't coded to take full advantage of the 7900 cards or
2. There is some other limiting factor.
I'm thinking it is more to do with a limiting factor somewhere.
Thanks to Phobos' experience we know that CPU speed has a effect, however Bio's 4.5 GHz Ivy is a reasonable match for Bal3's 5 GHz Sandy so that doesn't explain the differences
From my experience the PCIe speed also has an effect. Bal3 is running a PCIe 2.0 CPU, Bio a PCIe 3.0. I wonder if that would explain the difference?
I am running a 2700k. I got a package discount on the z77mobo + 2700k at microcenter. (if wondering why I got z77). 4.4 GHz should be enough, even on sandy, my cpu runs from 33-37% with spikes up to 45%. We could set our CPU clocks to the same GHz, run 4 tasks, CPU set to 1.0, and set our 7950 clocks the exact same and see how similar WU times are. Could show us if there is some other limiting factor.
@GJ, it is apparent that for whatever reason, POEM does not like bandwidth limitations, We need someone to run dual 7000 series cards in x8 and see what their WU times are. Maybe Deegon.
This still does not explain the point discrepancy between the 79xx and 78xx, unless we are bandwidth limited... Or POEM must not be utilizing all the shaders efficiently. We should let them know in their forumsEdited by Biorganic - 11/8/12 at 9:29am