I have a Dell Dimension 8200 2.78 Ghz and 512MB RDRAM. Decided to up that to 1024MB and on the Dell site got confused so called a 1-800 number and the person I got hold of walked me through (actually placed the order for me) to get 2 256MB 533 front side bus modules to match the two I already have.Question - I'm taking his word for the 533 as opposed to the 400 so how do I tell what is in my machine?Question - If the current pair is 400, will the 533 pair cause a problem?Phill RoathBTW - also have Radeon 9700 pro and run FS9. Have some stutters with most sliders maxed out and some have reported memory increase as helping.PS - Ordered today, so should get them in a couple of days...

Never mind... :-rollGot to work and found the original order printout. I have the 533Mz system bus so I do have the right RDRAM on order. Dell protected me from myself.Phill Roath