Photoshop doesn't require much memory/RAM. It really depends on how heavy the documents are that you're creating. Either way, it would run on most computers, low-end too. I'd need a fast computer for:

- Playing modern games, including Half-Life 2, or Oblivion.

- Using Vue 5 Infinite.

- Editing high-poly models with little or no lag and rendering, in 3ds max.

-And yes, other stuff, including Photoshop.