The biggest update to the new MacBooks—on the inside anyway—is their graphical muscle, which has been hooked up with some Barry Bonds-level steroids. Apple ditched Intel’s crummy integrated graphics and chipset (basically the traffic controller between the processor and everything else) entirely, opting for a new one from Nvidia that combines the chipset and a GPU on a single chip—the GeForce 9400M. The MacBook Pro, being more Pro-erer than the MacBook, now rocks two graphics cards—the integrated 9400M and a separate, beefier GeForce 9600M GT. If that swirl of numbers, letters and BS is confusing, here’s what’s up.