I don't think so. It came with the G3 and I guess had been running fine with it for years. I don't have any other cards installed that would be putting any strain on the PSU. Without the battery it's worked fine, so I'm assuming the battery had enough juice to keep the time, but not enough to keep everything else right. I should get my hands on a multimeter some day and go through all these PRAM batteries and see what state they're in.