Hi everyone! I have 2011 Macbook Pro and until now everything's been fine, no issues, no GPU failures. However a few weeks ago I replaced optical drive with an ssd and reinstalled OS on it. Performance's been terrific since then but it started to do crazy things. For example I can't view items as a list in finder, the files area looks corrupted and any window I drag over it leaves an image on it. If I press get info there's some corruption in some areas on the window too. Sometimes when I click on any icon in the dock instead of activating the app it opens finder window and shows the app location there. Or sometimes when I click anywhere it clicks half an inch to the right of where the cursor is. When I use quick look in finder it's always blank or shows no items selected. I have mac os 10.9.5. Is this what people call "gpu failure"? I only got it after I reinstalled the OS. Thanks.