Faizan Rasul :
the apus in my budget are the a8 7600, a10 6800 and a10 7700k
also can richland apus use mantle
thanks
Depends on your timeline... both the A8-7600 and the A10-7700K support Mantle and TrueAudio BUT the A8-7600 has still not been released (slated for the second half of this year).
If you want a processor that you can adjust the TDP from 65W down to 45W, wait for the A8-7600 (as I am for my HTPC build - I'm in no hurry).
If you need to start building now (and I know that feeling as well), go with the A10-7700K.
And, no, the Richland APUs do not support Mantle... sorry.