Abstract: A method and system for preventing loss of data in a computer interface board during power failure includes providing a secondary data path to a non-volatile storage element from a cache memory of the computer interface board. Components in the secondary data path, such as the cache memory and non-volatile storage element, are powered by a secondary power supply. The cache memory of the computer interface board is a volatile memory. The secondary data path with the non-volatile storage element enables reliable memory operation during both normal and power fail modes. A power failure at the computer interface board is detected. The power failure may result in incomplete transactional data within the cache memory. Upon detection of power failure, the incomplete transactional data at the cache memory is transmitted to the non-volatile storage element through the secondary data path using the power from the secondary power supply.