Here, you can see that I removed the lowest baffle, the one below the video card. I took a quiet 80mm Vantech Stealth fan and mounted it in place of that baffle, next to the video card, blowing directly on it. Then I took the video card's built-in jet-engine fan and wired it to run at 7 volts instead of 12 volts.

Now, instead of one super-noisy fan directly mounted on the video card, I've got three incredibly quiet fans in that lowest video-card section, blowing air through the case and onto/across the video card. This allows the card to run 3D games at high resolutions with all the settings cranked, and it doesn't cook the card, yet still remains whisper-quiet.