Disk Drive Controller
The system drive controller is an important part of system performance. In most modern boards your drive controller will run off of the PCI-e bus. The PCI-e bus performance can be affected by poor trace layout as well as many other design choices that show up on different boards.
For testing we use Sisoft's Sandra and Everest.
HDD performance is just a hair behind the SB850 which again is not bad considering the HDD controller on the 870A is an AMD SB710. What is a little concerning is that we see the speed drop off when we overclock the system. That is somewhat worrisome and could represent a stability issue with either drivers or even with memory to HDD to CPU performance. Thankfully SATA 3.0 and USB 3.0 performance is where it should be.
Stock HDD Performance
Overclocked HDD Performance
Stock USB 3.0 Performance
Overclocked USB 3.0 Performance
Everest backs up our findings with Sandra including the tendency to drop in performance when overclocked. We find something that could be a pointer, though; performance drops off when reading from the middle and end of the drive. This could be an indication of a problem with the trim firmware in the Corsair Force 120 and the SB710 controller.
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