So the chipram access speed is really important.
Which is why you do all the work in FastRam and then only copy the result to chipmem
If your chipram access speed is only 50% of theoretical maximum then your maximum framerate is only 50% of what it could be.
Well, that's only true if you do absolutely nothing else than copy a frame from fastram to chipram (in other words, you don't do any kind of calculations or other operations). Fortunately the differences in chipmem access on different accelerators aren't really that big.
