Hi, I've been given 2 512mb sticks of identical pc2700 ram which I thought I would use to upgrade the kids pc. The problem... The bios will recognize either stick correctly in any of the 3 memory slots & the pc will run quite happily but when I install both sticks the bios will still only see 512mb. I've tried clearing the cmos, I've run memtest on both sticks with no errors. I'm now stuck Any ideas?? Athlon 2600 Epox 8k9a mobo 2 sticks 512mb Twinmos ddr Thanks in advance.