Memory Scaling, AMD's Trinity-Based APUs, And Game Performance

When it comes to gaming, the integrated Radeon on AMD's Trinity architecture crushes the HD Graphics 4000 engine native to Intel's fastest Ivy Bridge CPU. But we want to make a good thing better. How much does fast memory help boost an APU's performance?

http://www.tomshardware.com/reviews/memory-bandwidth-scaling-trinity,3419.html#xtor=RSS-182