At the following https://downloadmirror.intel.com/25588/eng/ReleaseNotes_GFX_188.8.131.5232.pdf you should be able to find all the details, key issues fixed and known issues with this version.
Thank you, I have been looking at those but never notice any performance enhancements for the 4th generation. Im guessing that has ended? Maybe I should just stick with the .4170 driver.
Are there any places here that compare graphics performance between driver versions?
Intel publishes all the information in regard to key issues fixed and known issues on the releases notes for each driver, if that specific driver increases performance on certain platforms the information should be on the release notes. My recommendation is to stay with the current driver, if it works for you should stick with it.