No features in AI support Open GL Open GL is a support that the system offers if you have a supported graphic card there is no way to turn it off sysem wide but you can turn it off in Photoshop. Although I do not think this will cause lag I guess there could conceivably a reason why it would cause lag. I have noit heard of such a thing.
I do know of somehing that can cause an application to lag. It is not a popular piece of advice and gets other users angry but if you keep in mind that it worked for me and I understand for other people then you can try it.
But if it in anyway upsets you then don't try it it is only a suggestion.
Clear the personal cache files out.
read this article to learn how to do so.
http://helpx.adobe.com/x-productkb/global/troubleshoot-unexpected-beha vior-user-account.html
