The 7900GS is actually a low wattage card. And it only really pulls power under heavy load, like gaming. Get the 7900gs and the 9-cell if you are worried about battery life.
For the thread creator, I've had an e1705 for a couple of months and I love it. A few issues: First, Dell's software install sucks, so use Dell Decrapifier or better yet, reinstall Windows. Second, the DVD-RW sucks. It's a Sony, and it specializes in coasters. Get the bottom-of-the-line CD-ROM and upgrade to a slot-load through Newegg or something. Third, and this is just my large hands issue, my thumbs always hit the trackpad and make the cursor jump. I'd prefer to disable the trackpad and use an external mouse.
But there is simply not a lappy on the market that can run with the E1705/7900gs combo for the price Dell charges.
Originally Posted by daveduv
I'm about to purchase a E1705 and am debating between the ATI x1400 and the Nvidia Go 7900gs... how much will the go 7900 reduce my battery life?