"Regardless of base core clock, when run within the confines of the power limit and thermal profile, the GTX 950s are boosting on their own to over 1400MHz on the core to push that performance envelope. Manual overclocking allows the end user to push a bit harder and I was able to hit GPU Boost speeds of 1551MHz on the EVGA SSC, 1538MHz on the MSI Gaming, and 1569MHz on the ASUS Strix. Overclocking of the 2GB of GDDR5 memory on each card was just as fruitful, with speeds in excess of 1855MHz on each of the three cards."



Link: OCC