I had a tendency to leave my 2010 Mac Pro tower. The primary hard drive took a dump. I replaced it with a brand new hard drive and ever since then it has been EXTREMELY slow and freezes up very often. First I thought maybe the internal wireless card was dying(no hard line to the tower) but after running a ethernet cable to it, it still runs very slow. Does anyone have any clues or ideas to repair this? I was worried it was the lack of memory as I have one 2Gig of memory in it presently but plan to upgrade to 16 or 32gig, add a new video card and a SSD for my boot drive. If anyone has any knowledge about this topic please let me know. Thanks!!!!