Any idea what kind of performance we can expect from a 3850?
Approx the same as for any other ATI GPU, capable to run brook.
~25% increase over last opt AP release [
measured on Q9450/HD4870 combo. For slower CPU you will see bigger speedup and reverse]
Only part of algorithm ported to GPU (hence "hybrid" build) and ported part is heavely memory-bound so sometimes 2600 performs better than my HD4870.
Exact speedup should reveal beta testing.