I am adding some RAM to a friends computer and have come across quite a unique problem. I told him to go to crucial.com, put in his mobo board make, and then his model and it will tell him what RAM he needs to by so I can pop it in for him. His Mobo is an Elitegroup (ECS) P4VMM2. I got the RAM which is PC3200 512 Mb 184 pin. I opened his computer and he has 4 memory slots in his computer. 2-DDR slots and 2SD DDR slots. I go to the ECS website and download the manual and it doesn't show the SD DDR slot's, just the DDR slots. I removed the PC 133 card and installed the new DDR card and it will not even try to boot up. Has anyone seen this before? If so, how can I get the DDR slots to start working and disable the SD DDR slots?