I installed a gig of pc3200 kingston ram into a dimension 4600. The system is suppose to support 400mhz, but it is showing speed of 333mhz in bios. I removed the old ram, and I'm sure the 2 sticks are what they are suppose to be. Any way to make it run at 400mhz? Thanks in advance.
I'll try to keep this simple. Your CPU has a 133mhz FSB (533 quad pumped). It is capable of using 4.2 GB/s of memory bandwidth. When you run a dual channel configuration, you only need to run PC2100 Ram (capable of providing 2.1 GB/s of bandwidth hence the PC2100 name) to meet those needs as each memory channel provides the CPU with 2.1 GB/s (2.1+2.1 = 4.2 GB/s).
So when you're running your Ram at 333 or PC2700, you're already providing your CPU with more bandwidth then it can use (2.7+2.7 = 5.4 GB/s). If you would increase the Ram speed to 400 or PC3200, that would just mean more wasted bandwidth (3.2+3.2 = 6.4 GB/s) & you wouldn't even notice the difference.