hey guys, I'm a macbook pro guy through and through. I'm looking for a used iMac as a backup, but I'm struggling with some stuff. There are 2 I'm currently looking at : Processor: Intel Core 2 Duo 3.06GHz Ram : 4GB DDR2 Ram Hard Drive : sata2 500GB Video Card : Nvidia 8800GS 512MB I researched the video card, and it appears to be mid-range, which is okay The next one : Processor Class Intel Core i3 Processor Speed 3.06 GHz Cache Size 4000 KB Number of installed processors 1 Graphics Number of video cards included 1 Installed Video Memory per Card 256 MB Video chipset ATI Radeon HD 4670 Memory Memory technology DDR3 Maximum system memory 16000 MB Storage Total Hard-drive capacity 500 GB Hard Drive Speed 7200 RPM Now, how can both the i3 and C2D have the same clock speed? Is it the seller making a mistake? And the DDR3 ram? About the ATI, how does that card fare vs the nvidia? People state memory isn't the only factor, since some cards can't even use it all. All it would do, would be office work and playing some world of warcraft (raiding). I assume the first one would play it just fine on medium settings? What about the latter? Many thanks for your help in advance. I'm using the i7 MBP and never had to worry about clock speeds and graphics cards before.