Just noticed you wrote 740. Right now, myfico's published guideline says the general cutoff for the lowest level interest rate on a 30-year mortgage is at 760. That doesn't necessarily mean anything in your particular case but it's some advice to keep in mind based on national trends. (And remember, that's when scored on a mortgage version of FICO, not a CC version.)

There is actually a FICO scoring "flag" for "too many accounts showing balances". In my personal experience, I can see a swing in the neighborhood of 20 points between months when I make sure < 3 balances show compared to when I don't care and, say, 10 balances show. There's also quite a bit of research in the myfico forums where people have tried using their own reports and figuring out how much to show.

The concensus there seems to be that the ideal case is to show one balance of less than 10% of that one credit line, which would therefore also be less than 10% of your overall credit line. In your example, as long as the credit line on that one card is more than $10,000, you would be better off showing one single balance of $1000 on that card.

(There is an effect that would seem to counteract that. If you have a dormant card and suddenly it reports, you can see a jump of a few points from that but it's a separate cause. Capital One has a habit of doing this; if you don't use a card for a while they simply stop reporting it until you use it again.)