I recently upgraded my MBP to a 7200rpm HDD and knew going into it that it would make my laptop run a bit warmer. To monitor everything I'm running iStat Pro and indeed it has heated up since I've installed the new drive. iStat Pro gives me eight different temperature readings though, and they all vary quite a bit. Which ones should I be watching most closely? And what are the ideal parameters? I notice the Ambient temp is usually higher (sometimes quite a big higher) than the HD temp. I've seen it as high as 121F. Heatsink B and Mem Module A1 (whatever those are) tend to be the warmest even when the MBP isn't doing anything demanding...upwards of 115F. So I guess I'm just wondering which numbers are most important to keep an eye on and what are safe temps for them? And what exactly do all these different temperatures measure, anyway? For example what's Ambient measuring? Thanks!