I can't say definitely, but you should be able to run both without any problems, and any time you add more RAM you'll get better performance, as long as you don't have a chipset that only chaches 64MB, which is highly unlikely in your case. I think they both will run at 100MHz though, but that shouldn't be a problem. Ram is supposedly backward compatible, and PC133 should run at 100 MHz just fine.
Try it, if you have problems, pull one and just run the other.
If you had everything...Where would you put it?
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