Quote Originally Posted by VulgarHandle View Post
again, 16 K10 cores performed a task in half the time as 8 K8 cores, at twice the performance

assuming POVray scales like most say it does, that would mean you would need 32 K8 cores to match the 16 K10 cores (double the K8 cores to match the pixels/s, then double that to match the time)... theoretically
No, you don't understand.

It is 2x performance. The task is to process n pixels. K10 processing 4000+(it is said more than 4000, not exact number. So I assume 4400 pixels/s according to the times) pixels per second and finishes the processing for 56 seconds. For the same task the K8 needed 112 seconds because it was processing 2200 pixels/second.

It is like you have two cars on a drag race and the faster car finishes the race after 56 seconds with average speed of 200km/h. The slower car finishes the race after 112 seconds with average speed of 100km/h. The faster car is 2 times faster than the slower car, not 4 times.

Got it?