[MY SYSTEM] CPU: Intel Core 2 Duo E8400 3.00GHz (3.51GHz Overclocked) Mobo: ASUS Striker II NSE NVIDIA nForce 790i SLI Mem: OCZ Technology DDR3 4x1GB PC3-10666 1333MHz Platinum Edition Video: MSI GeForce 8800GTS 512MB 700/2000MHz HDD: Western Digital Raptor 150GB / Western Digital GreenPower 500GB OS: Windows Vista Ultimate (64-bit) Just thought I would make a post on a problem lots of people seemed to having with Windows Vista crashing on 4GB of RAM installed. Firstly, if you have blue screens of death attempting to install Windows Vista, install it on 1-3GB of RAM initially, I installed on 2GB. Secondly, stability issues within Windows after installed. Stable on 2GB, games/certain memory intensive applications freeze in 5-30 minutes on 4GB. None of the patches off the Windows site or updates had any effect, one seemed to temporarily work and then all hell broke loose again. I have, however, managed to keep my computer stable; running Sins Of A Solar Empire usually crashes in under 30 minutes on 4GB, but it's been well over an hour and no crash yet. There appears to be two temporary solutions for this problem until a proper fix is realsed by Microsoft regarding this issue. 1) Remove the additional RAM and simply run on 1-3GB of memory, just use the max memory of what you have that is below 4GB. 2) If you insist on running on 4GB, change the voltage settings for your RAM. I cannot tell you which will work for your system, how ever I can tell you that fiddling with the voltage settings in the BIOS changes system stability for the better. I overclocked my RAM to a 1560MHz frequency (along with my CPU overclock to 1560FSB) and this has kept my system stable thus far. If your motherboard has auto-overclocking features, simply push it up one level at a time until the system no longer crashes, if you have extensive overclocking knowledge you can manually apply it of course. Please note that overclocking can damage your system if you do not have sufficient coolant devices for each component. Hope this helps anyone who reads it.