That is the question for this thread. I am reading a lot of mix results about this. 1st the absolute of "40TMUs confirmed" statements 2nd the 4850 may have 32 TMUs when the 4870 has 40 TMUs 3rd both 4850 and 4870 use only 32 TMUs Now IMO, the results I've seen so far on the 4850 just doesn't impress me if it is using 40 TMUs. I would expect results higher then what I've seen so far. This is why I believe that the 4850 is using 32 TMUs. However, if a driver problem exists then that could explain the results so far. In all, it's not very clear to me and, I have not found any information on Rops. Your thoughts?