Ok. So you've defined the Intel 845 chipset on your motherboard.
But is it the 845 or 845G chipset?
for the specifications of the Intel 845 chipset.
for the specifications of the Intel 845G chipset.
Peepnklown is only HALF right.
The Intel 845 chipset does NOT support PC133 memory.
The Intel 845G chipset DOES support both DDR and PC133 memory.
The 845 has a single memory controller for DDR memory.
The 845G has two memory controllers. One for DDR and one for PC133.
Although you're going to need DDR memory as it is FASTER and less expensive than the older PC133 memory. (Believe it or not.)
I do NOT recommend using Corsair's ValuSelect memory on this chipset. I have two boards with the 845G chipset and that type of memory does not allow the board to boot.
These boards typically come with DDR266 (PC2100) modules installed.
I would go ahead and buy DDR333 (PC2700) memory for it. The board you have may not utilize the full speed of that memory, but will use tighter memory timings if the RAM is clocked down by the board. This will result in better efficiency of memory use by the processor.
Think of it as giving the motherboard "breathing room".
I could recommend PNY memory for the most basic compatability. (Not that they manufacture their own RAM modules...) Or perhaps Nanya, Infineon or Microtek.
Look for memory compatability lists for your particular motherboard module online. You could also use PNY's memory configurator on their website.
for PNY's memory configurator.