Commenting on the bolded part... Here's the issue, certain motherboards will everclock better if all banks are not full. Larger size RAM modules generally have loser timings - so if you have 2x512mb sticks, that ram will have better timing than 2x2gb sticks of the same speed (in MHz). Also, certain combinations of ram, bios, motherboard, etc behave better than others. I haven't had a lot of different combinations of ram and motherboards, etc, but I have experienced this issue myself. However, in all cases simply tweaking the timings allowed for greater CPU overclocks. When it comes to gaming, ram generally has very little or no effect on fps/performance. So on this front it is a non-issue to me. Certain ram intensive operations can be affected, but I do not use these types of applications/processes - at least not to a point that it bothers me that it may be a little slower as a result of my ram timing/speed. The most important performance factor for me on my computer is how well games run. And on this topic, I have yet to find ram speeds/timings (within reason) to affect gaming performance.