Bests & Worsts Reviews from Amazon

This is high-quality RAM and it may well make a significant difference to your machine. If you find that you're running many programs at once or using some more demanding programs like Photoshop this RAM will give you a bit of an edge. Read some of the reviews here and you'll see that. But do note, this RAM is for the mid-2007 iMacs and MacBooks. The latest generation, the ones released in 2008 with Intel Core 2 Duo processors can still use it, but will do better with a slightly faster RAM. This is PC5300 RAM and is 667MHz. What you actually want for the latest generation of Macs is MC6400 RAM running at 800MHz. It's not going to be a night and day difference, but it's about the same price and you may as well get the right stuff. To find the stuff you should get, search for this here at Amazon: KTA-MB800K2/4G. That is the Kingston part number and will turn up the one you want.