Hi! AFAIK all Rev. 6 motherboards should have shipped with 1MB chip configured as default. I'd re-check your jumper settings. If you remove the ram card and boot up, how much memory is it showing then?
Also I encourage you to read the articles for your particular hard card. All of the Amiga hard cards I'm familiar with have a power connector for powering a drive directly from your card, like this:
