Note to siriq...
Your 4.8 overclock doesn't seem optimal after all. I guess I mistook your SIMD results for your stock Blender results or something because your Blender results are lower than my Piledriver results as is your Cinebench multi. In fact, I was able to get 770 as a new high with Cinebench multi at 4.8 (up from two runs at 767).
Using the formula with your SIMD result gets only this score: 37314. Mine was 45455 at 4.8.
With the stock build the result is only 20000. Something is off with your system. Must be throttling.
You said 2:05 (125 seconds) for stock Blender at 150 samples. That's 96000000/125/8/4.8 = 20000. By contrast, I got 23923.44
I use this CPU in a motherboard, does not officialy supporting top FX series. Also, my ram is running on low mhz. Only 1700. Cinebench and render software's are preferring high ram settings.
http://www.gigabyte.com/products/product-page.aspx?pid=3417#ov