I have a Gainward GF3 card I just installed the Crystal Orb on. It's a nice piece of hardware, with one exception. I was not able to install using the so-called "easy push pins." With an tremendous amount of force, I was able to get one pin pushed through, while the other pin bent before it would go through.
I ended up slapping it on with Artic Silver Adhesive. I'd learn about a fool-proof way to install using the pins before attempting...