I have an old Compaq machine that right now has 1 stick of 512mb ram in it. When I try and stick in any more, it comes up with a boot error saying something about the ram and then restarts. Is there any way to increase the maximum amount of RAM the mobo will handle? Iv got like 5 128 sticks just sitting here and I would love to use em.

Intel Pentium III EB - 933MHz 256 L2 cache

Northbridge Intel i815/E/EP rev. A2
Southbridge Intel 82801BA (ICH2) rev. 01
Graphic Interface AGP
AGP Revision 1.0
AGP Transfer Rate 2x
AGP SBA supported, enabled
Memory Type SDRAM
Memory Size 512 MBytes
Memory Frequency 132.9 MHz (1:1)

To the best of my knowlege you should just be able to stick em in there.

Did you make sure the RAM was the right speed? Safe bet would be make sure it's the same speed as what's in there already. If it's all correct then the only thing you can do is buy a new mobo.