hi guys i have been using the following mobo for about 6months now....i was using 9800gt so didnt bothered about the onboard video.....now i sold it so just to check the performance difference in different buffer sizes i changed the buffer to 512mb(default 128mb) and what the system doesnt boot......i need to clear cmos.....same with 1024mb and 256mb in short if i manually set it to any value it doesnt boot....auto it takes it at 128mb