Hi. I recently ordered 2 sticks of ram (2 x 512MB) PC3200 from Patriot. Its timings are 2-3-2-5. I currently have 2 x 512MB OCZ ram (timing 2-2-2-5) PC3200 as well. OCZ runs dual channel. Here is where my problem starts. I put the additional two sticks of Patriot RAM in 2 and 4 (OCZ is in 1 and 3). I get a long beep at start up, so I decided to reset CMOS and try switching them (Patriot from 2 and 4 to 1 and 3, and OCZ from 1 and 3 to 2 and 4). My system boots up but then before the windows screen shows up it tells me that there is some file missing in Windows/System32/xxx folder. So i decide to reboot and try again and the computer restarts after the Windows screen. After I decided to remove OCZ ram it boots up perfectly, same thing happens when i put in OCZ and take patriot out. Can any tell me what could this mean? Thanks a lot in advance.