(1) Take photo of this screen with camera. Screenshots won't work. Use 1/10th second exposure or longer to capture multiple squares. If camera exposure can't be raised, decrease camera ISO and/or reduce monitor brightness, to make camera do longer exposures. If you see only 1 or 2 white squares in your photo, try again.
(2) Photo should not contain any popup messages. Take photo only when you see "READY" at bottom of page. "READY" means this test is ready to be photographed.
(3) Check photo for frame skipping. Compare to example good photo and example frameskipped photo. The photo should have a sequence of multiple solid squares, with no gaps in between. If there are gaps, then there is frame skipping. For an alternative testing tool, see Refresh Rate Multitool from shurcooL.
(4) Post your display overclocking results in the new Blur Busters Forum!