My set-up is a 2.8 Pentium with a gig of memory with high-speed internet (cable).
It's adequate.
I find for my type of work, monitoring 6 to 8 real-time markets all the time during the day session hours, I needed something a bit more than what I had, which was a 2.0 w/ 512 gigs.
Never fudge on equipment / data and internet feed for your trading business.