I just got an ASUS GeForce GTX Titan Black as an upgrade to my ASUS GeForce GTX 560 and yesterday I installed the Titan Black and started a render (cycles, CUDA) in Blender to see how much faster it is.
According to several benchmarks on the internet, the Titan Black should be at least 3x as fast as the GTX 560 (both not overclocked), but in my renders I saw that it was only 1.8x as fast as the GTX 560 (off course both with the exact same Blender settings).
I have GPU Tweak open and it tells me that the Titan Black’s GPU usage is 99%, wich is a good thing, but that the (GPU)Memory Usage is only 910MB (it has 6GB on board).
Also, when I render the 2.6x Cycles render benchmark (I can’t post URL’s because of the rules (I am new here), sorry), my Titan Black renders it in 55.05 seconds, a normal Titan does this in 29.47 seconds (both the same CPU (i7 2600)), while the Titan Black is an upgrade to the Titan.
This benchmark was made for Blender version 2.6, but 2.71 is actually faster so this can’t be the problem either.
I have my Titan Black connected to a PCIe 2.0 slot, but according to several gaming benchmarks this is not a big deal and decreases the FPS only with 1-4 FPS.
Does anyone have any ideas why I have these results and if I can do something to improve them?
Thanks in advance!
OS: Windows 7 home premium 64bit
CPU: i7 2600
GPU: ASUS GeForce GTX Titan Black
RAM: 8GB DDR3 Corsair RAM 1333 Mhz
PSU: 700 watt Cooler Master
Blender version 2.71 64bit