Adobe announced today that Photoshop CS4 will feature a 64-bit version for Windows Vista. The 64-bit version will not be available on OS X. Adobe gave no details of whether they will eventually develop a 64-bit version for Mac.
Performance will be 10% greater with the 64-bit version, and that’s not including the time it will take to load a file. It will also mean Photoshop will be able to use all of your RAM, so for those of us who have 4GB or more, this will give even greater benefits.
Speaking of RAM, it sounds like 4GB will be the minimum for CS4.
There is no word on when CS4 will be released.
Source: TG Daily