I'm not using the GPU at all. Just using the 64-bit CPU rendering engine, with all 8 threads running. Very fast. If I'm willing to give up bounced light and just do a direct lighting test for composition and overall light levels, I get 750,000 samples per second using only the CPU.

I haven't done anything with the 5770 yet, but I'm hoping it will work with the GPU version of Lux. I haven't even looked at where that is yet. Too busy with the exporter.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)