AMD has just announced that they will address the frame pacing problem with the new Catalyst drivers on July 31st.
The prototype driver which was available with the Radeon HD 7990 for selected reviewers will now be replaced with a public version, which would remove the issue once and for all.
Big news for CrossFire! We plan to release our driver that delivers improved multi-GPU frame pacing on July 31. More info soon.
— AMD Radeon Graphics (@AMDRadeon) June 20, 2013
Since April PCPerspective insisted to receive the latest prototype drivers to see what is the progress in eliminating the problem. Apparently AMD refused to send those, but it doesn’t matter anymore since AMD has finally resolved the issue and in a month every CrossFire user will finally be able to download the working drivers.
For those who missed the whole fuss around the frame rating procedures, here’s a short explanation. Two years ago Scott Wasson wrote an article explaining why measuring frames per second do not actually correspond to the actual user experience. He focused on how and where are the frames actually created. Other sites started digging into the problem and as it turned out, some graphics card took more time to generate each frame than others. The issue was somewhat resolved with the Kepler GPUs from NVIDIA, while AMD graphics cards stayed in the back, especially in dual configuration. Since then PCPerspective published few articles showing the difference in frame pacing between multiple cards, the chart below is one of them, also showing the prototype driver.
In other words, frame pacing could lead to stuttering caused by runt frames and therefore applications like FRAPS would report inaccurate data.