Hi, I'm currently running a Macbook 2,1 with 10.7.5. I use it as a mobile development machine (my main machine is a windows box with 16GB blabla...), and although it's no where near a great performer, it does decently considering it's age. The main reason I'm asking this question is because my machine seriously lacks RAM, and it hurts, a LOT. The 2,1 models only support 3GB of 667Mhz RAM (which I obviously maxed out on a while ago). I don't have too much issues with the processor, but the RAM "experience" is terrible. When I run Eclipse, Webstorm, Browser (or Parallels) simultaneously, I work with around 20MB (yes, MB!) free RAM, and the fans spin on 6000RPM the while time. I wanted to wait for the new Haswell MBP, but I already have a 256GB SSD, and I mainly want new RAM. So I figured why not spend less than 1/2 of the money and get by another 2 years maybe?! The mid 09 MBP sport 8GB 1066 Mhz DDR3 RAM max, the NVIDIA 9400M, SD slot and backlit keyboard, run ML, with the later being nice addition and so on. The CPU power is not my main concern, also I use it mostly in the lab plugged in, so battery-life is not THAT critical either, but as far as I know the 09er have "7 hrs". So my concrete questions are basically just a these two: - Can I run youtube 720p videos without the fans going ape-**** with the NVIDIA 9400M? - Is it worth approx. 550€ (600€ with RAM) without the RAM upgrade? I estimate that I would get around +2 years of usage out of this machine, which would cost me around 600€ total with the new RAM. I understand that the new Haswell MBPs are far supperior, but considering my current machine, and the price difference (this around 600€ vs around 1500 for a new). Thanks for any helpful answers!