It really, really is! It will use all the RAM you can give it, of course depending on the image sizes you're working with. It also needs a swap file about three times the size of the largest image you want to work with. If it ever crashes, you'd better be sure to look for that temp file and delete it, because it can take a CHUNK of your hard disk space and it will stay there forever if you don't manually remove it. I have an Intergraph workstation and it's old now, but I got it so I could work with images. As prices on things came down, I added more RAM, a second processor, a 9Gb Ultra-SCSI HD, etc., and Photoshop uses whatever you give it. Some of the people at our company are using it for aerial photo work, files 1Gb in size. They have workstations with 2Gb RAM, 4 processors, and their own RAID array. Gromit