Hey guys. I just purchased some additional memory for my Vista computer. I have a DFI LAN_Party Ultra-D MB. I had in there (2) OCZ PC 3200 2-3-3-6 512MB sticks running in a dual channel config. I then went out and bought (2) PNY Optima PC 3200 3-3-3-8 1GB sticks and am running them in dual channel. I can't get them to play nice together. When I have all 4 in, the only way I can get it to post is by setting the CL manually to 3 (no problems with that since that's what my slower memory is rated for), and leaving the other settings on auto. Granted, I have not tried every setting yet, as that would take a long time due to the dozen or so options in my BIOS just for memory. The problem is CPU-Z shows the frequency as 100MHz. When I have just the 2GB of new memory in there, I can get it to run at the 200MHz it should be running at. My MB manual says that 4 sticks running in dual channel should only be running at 166MHz. I would even be ok with that. I tried forcing the memory to run at 166, but no post. I have attached screenshots of CPU-Z in both configurations. If anyone has any settings they think would help, please let me know. If nobody has any ideas, which configuration would allow my system to run faster? I mainly use it for playing games and internet surfing. I have played both Shadowrun and Halo 2 with both configurations and it seems to run fine in both scenarios. Thanks for your help.