Hi, I'm trying to overclock my Clevo P170EM LCD to a higher refresh rate than 60Hz with no success. Still getting bandwith related error message in Intel HD Graphics driver so I tried Powerstrip... which allows to create custom refresh rate but as soon as you change it, screen turn grey and nothing... had to hardreset. Does anyone had any success with Powerstrip / HD4000 ? First heard of LCD OC here and here. Thanks in advance for any tips you could share.