Associate
OK, been back to look at the DIMMs once the battery had run-down... and good news! I can get the Crucial DIMM to work with the existing Kingston cbd26d4s9d8me-16 but only if I switch the Kingston chip out of the default slot 3 (as it came installed) to slot 1. I could only get both chips to co-exist with the Kingston in slot 1 and the Crucial in slot 3. FYI, HWiNFO64 reports the part number of the Crucial chip as 16ATF2G64HZ-2G6E1 rather than CT16G4SFD8266. I've attached HWiNFO64 reports for both chips, hope it helps.