When overclocking your system to 150 MHz, some motherboard components will also run faster:

PCI

Due to the faster system speed, the PCI bus will run at 37.5 MHz instead of the standard 33 MHz. Usually, this should not be a problem, as most cards can easily tolerate a few more MHz. However, there is no other way than trying out to determine if a certain PCI card works at 37 MHz or not.

AGP

Also the AGP will be overclocked a bit. It runs at 75 MHz with 150 MHz FSB. So far, we have not heard of any graphics card that would not run at this AGP clock.

SDRAM

Some memory companies do already offer PC150 SDRAM. This is of course only interesting for overclockers, who can appreciate the memory manufacturer guaranteing problem free operation at 150 MHz.

Please realize that there is hardly any SDRAM module available which would run 150 MHz stable at CAS latency 2, so switching to CL3 is the only reasonable choice.

Don't try using PC100 memory at 150 MHz, as it is prone to fail. I also would never overclock low-cost memory, no matter which cycle times it claims to comply to.