If you are going to be using the computer in your sig, then you'll be ok.
PS is pretty CPU and RAM intensive. I have the same amount of RAM as you, but a CPU that has 1 core (compared to yours that has 2) and much less power, and I do just fine
Also, I'd strongly recommend you remove the near-porn from your sig. I can do it, but you I'm sure you would prefer to do it, instead of me