We've been hashing with these Gigabyte models for a while now, and they are pretty dang sweet for mining. Most of what we have are the F60 versions (Elpida), and get at least 740khs. We have a few of the F70 versions (Hynix), which get upwards of 800kh/s! I do not know what version the new ones are going to be. The tri-fan design does an excellent job keeping the core cool, as seen by the screenshot below, and is very quiet.

Here are pictures of our previous orders. These are cards we currently have, cards we are currently mining on, are not the cards we are selling. However, they are the same brand/make/model, and is a good indicator of what you will be getting.