poker specs, you say?
Seriously though, there's a ton of threads all over the place about this, not just CTH.
Also, try clearing out all the crap off your PC and then see how it runs; three years old is still probably gonna be decent enough, if you just keep it for poker only, and do all your other internet stuff on another machine so it doesn't clog up.
Or get the nice shiny new pc, just keep THAT exclusively for poker, and play other games, watch porn or whatever on your 3 year old machine