----- Original Message ----- > > > >I added a stick of 32b 168pin PC100 to the existing sdram stick. Computer > >recognized ram total of 40 megs instead of 64megs. After talking with > >several dealers they told me using PC100 on the 66mhz FSB will result in only > >50% of that ram being recognized. In my case, less than 50% was recognized. > > > >Any thoughts? Your motherboard likely predates the introduction of the 100Mhz ram and does not support it in tangent with 66Mhz ram. However, they should work independently. 40MB is mathematically correct for your situation. In case your interested in the aspect of why 40MB. Frequencies in a parallel circuit calculate similar to capacitors. To find the average you have to reciprocate the values first. 1/100Mhz + 1/66Mhz = .0251515 x 10 (wavelength in nanoseconds) Multiply this by the amount of ram you are adding. .251515 x 32MB = 8,048,480 (8MB) In your case, you gained 25% of the added ram. this is actually an old robotics formula and is normally used to calculate for wavelength and not binary switches (ram) but it works in reverse just like Ohm's law. -yui shin Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://nospin.com - http://nospin.org