Re-examining the unusual frame time results in our Radeon RX 470 review
 

It's never fun to admit a mistake, but we made a big one while writing our recent Radeon RX 470 review. That piece was our first time out on a new test rig that included an Intel Core i7-6700K CPU and an ASRock Z170 Extreme7+ motherboard. Once we got that system up and running, it delivered some weird-looking frame time numbers with some games. For example, the spikiness of the frame-time plot below didn't match any test data we had ever gathered before for Grand Theft Auto V, and we puzzled over those strange results for some time. We decided to go ahead and publish them anyway after doing some extended troubleshooting without seeing any improvement.

http://techreport.com/blog/30506/re-...-rx-470-review