I have an early 2009 8 core Mac Pro 4.1 (details attached) and I'm looking to make it quicker. I've just installed 4x 4GB 1066MHZ DDR3 ECC RAM (My mac is ECC enabled) and I've left 4x 2GB ram in from before (they are all made by Kingston). I've also got the OS on an SSD. My geek bench score is single - 2302 and multi - 12956. I recently found out I can upgrade my firmware from 4.1 to 5.1. If I upgrade firmware will my ram still work? and my graphics card/everything? I've read this is worth doing so you can upgrade to better hardware. Also if I was to upgrade my CPU to Intel Xeon X5680 6 core 12MB Cache 3.33GHZ will it work well with the ram/everything else? Do I need to install firmware 5.1? Thanks for your help and hope thats not too many questions! Any tips on how to speed this machine up whilst keeping the cost down would be great.