Does RST test the ECC bit?
RST does not have a specific test for the ECC bit. However, if you have ECC memory, you can run the software with and without the ECC bit enabled. If RST detects single bit failures with the ECC bit turned off, then when ECC is enabled that failure should disappear. If the failure persists, there could be a problem in the implementation of the ECC system. Talk to the motherboard maker and see if they are aware of the problem, make sure you have ECC memory, and finally make sure you have the latest BIOS for the motherboard.