dmesg entries and memtest

Can anyone maybe help me understand what the following means?  

I know it's something to do with memory, but can't find good information on what is happening here.  

This is part of the output of dmesg on a RHEL5 server that's being used for testing Oracle 10r2 (if that helps):  

EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow EDAC MC0: CE page 0x27ca8, offset 0x0, grain 4096, syndrome 0xf3e0, row 4, channel 1, label "": e7xxx CE
EDAC MC0: CE - no information available: e7xxx CE log register overflow  

I've tried memtest but it seems to hang after running for about 45 minutes. It tells me that it's done 10% and is on test 6 at that stage, but to be honest I'm not sure exactly how to interpret what memtest shows. I've taken a picture if that helps: www.supernaut.plus.com/06092007313.jpg  

Will really appreciate it if anyone can help me with advice on this. The only thing I can think of is to remove memory chips and run memtest on each one individually (if I know what to look out for in memtest, of course - I find the memtest info on the Internet quite confusing at the moment and need to figure this out as soon as possible).  

Thanks very much.

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