by email Hi DONK,once again i appreciate the advise taken and used last week about my upgrade,just to re-cap,upgraded RAM from 256MB to 1.5GIG corsair PC3200,and from onboard grphics to GeForce8600GT 256MB PCI-XPRESS,the changes were instant,great graphics//photos/colors/ETC..... Then i started to play some Flight sim and Train sim (MACKOY ///BVE) and everything seemed to be in slow motion and with a couple of seconds dely the fram rates droped to below 5FPS,before the upgrade i was getting around 17--20.Do you have any suggestions,PS,my PSU is only 300 WATTS,on the 8600GT box it suggests a minimum of 350--400 Watts, if its not the PSU, what could be causing the problem..Cheers WEG..............