Actually, the older MBPs will support 6GB. I have 6GB running just fine on my 2007 2.4 MBP. MBP 5,1 will run 6GB max. 5,2-5,5 will run 8GB. Apple claims it will only support 4GB, but the hardware will do more and OSX will use it just fine.
Actually, the older MBPs will support 6GB. I have 6GB running just fine on my 2007 2.4 MBP. MBP 5,1 will run 6GB max. 5,2-5,5 will run 8GB. Apple claims it will only support 4GB, but the hardware will do more and OSX will use it just fine.
I was a test user for that around our office. We had a bunch of 2007 era MBPs, and had some users complaining they were "slow". I personally think they were just jealous of the new unibody designs. I found the tests on Macsales.com and showed them to my boss, and he bought some upgrades for us (including his). To be honest, the only time I noticed a big difference was when running VMs on it. But it's still nice to have it and not need it.
Oh yeah, Everymac is a great site.
Edit: losing dual channel isn't that big of a deal. OWC ran some tests with and without dual channel memory, and it didn't make much of a difference. They basically found that the benefits of having more memory outweighed the benefits of less memory with dual channel. I'll try to dig up their tests.