Unfortunately you don’t provide any info on your motherboard/chipset and the main thing: the memory itself.
That’s why I’m giving you the worst scenario as an example.
For old motherboards before buying double check the amount of cachable memory for your sise of cach memory on your board.
For example, for the Intel® 430TX, 430VX PCIsets it is very important (either PC-100 or PC-133 work though). Otherwise it's possible your cach memory won't work at all and you'll get a slowdown instead, after adding more than 64 MB of main memory. Your chipset second level (L2) cache controller might supports a writeback cache policy for cache sizes of 256 Kbytes and 512 Kbytes. Cacheless designs are also supported. For information on the chipset, see Intel's documentation:
<A HREF="http://www.intel.com/design/chipsets/datashts/290559.htm" target="_new">Intel, Design, Chipsets</A>
Probably after looking through the specifications for your chipset, you’ll be lead to the conclusion that it will not run with chips over 8 megs each, hence you need a RAM module with at least 8 chips, to make a total of 64 megabytes.
Also, you gotta be careful around 64 megabit chips on the modules. They were new at the time, and they're are some special settings.
IT will problably work, but there is a possiblity that it might not, so be careful.
Try to disable SDRAM speculative read, anyway you’ll gain more improvement if compare with old-fashion 60 ns EDO.
Better make sure you can get a refund, just in case you can't get it to work.