Doing this in the config file is inappropriate. We need a test to see if ECC is enabled elsewhere on the motherboard. A config option may make sense if ECC on/off is a global property of the motherboard. Otherwise is should be a callback function that checks to see if ecc is enabled.
I think we can do the following, if ecc option is on, then check for ecc availibility if ecc is availible, then enable ecc; otherwise, skip ecc.
-Andrew