What difference will the speed of memory make?

[cuchillo]

Hi there,

I currently have 256MB of PC2100 RAM. I am looking to upgrade it to a total of 768MB. However the extra 512MB of RAM is rated at PC133.

What difference to the over all performance would if make if I were to put in PC133 Memory instead of PC2100?

TIA

Raja

 

[Tbird94sc]

you cant mix sdram and ddr. wont work or boot. different slots too gotta choose one or the other