That's pretty interesting to hear, I was always of opposite opinion as in most applications (outside of integrated GPU solutions like AMD Apu) the speed of memory made zero difference. My workstation has 2400MHz (just for sake of it), and older one 1600 running at 1333. Clocked to match performance (CPUs, 4930/3930k i7), there is again, zero difference in render times, gaming (2-3 FPS ?), or general computer usage.