UI lag or maybe my SSD is dying

Just started this weekend, my WOW main window started to lag. When I click on a new NPC, there is a brief pause before it is shown as target. When I start spamming my dps key in pvp, keyboard button 1, which ISBOXer translates to 1,2,3,Y. When I start to spam it, the main WOW window will start to lag horribly. If I stop spamming, it goes back to normal. I try to debug this but it is not due to add-on, graphical settings, or network. Have you guys experienced anything like this before ?

Sounds like addon or macro conflicts rather than anything an SSD would do. I presume you've tried the basic "disable all addons, then re-enable them one at a time" thing to see if that helps?

I tried add-on, by disable all addons. So it is possible it is due to macro. Maybe some castsequence stuff I had. I will try more tonight.

Oddddd, this only happens to my Frost DK main. My Paladin slave works fine. Must be something in the macro or ISBOXer to triggers excessive CPU usage for the DK.