Built-in memory: 4087 MB
Free memory: 1543 MB
Memory available to Photoshop: 3378 MB
Memory used by Photoshop: 70 %
Most folks serious about using Photoshop install more RAM. 4 GB isn't nearly enough. Look into an upgrade.
For what it's worth I have 48 GB and next system I put together will have at least double that.
-Noel
