How old is the equipment you have in your computer? I see that you use a 60GB SSD, this was much like 5 years ago, but when i used my 120GB SSD last time it sucked. I bought a 240GB SSD now.
Not saying it's not good enough, but it is possible that the equipment that you have is outdated. I also mentioned that you've opened a lot of the clients. This could cause the problem too. I hope it'll help you out.