I just bought a second 7950 from NewEgg for $199 to be used in a CrossFire configuration, however, this new card is reporting a bus-width of 32-bit, and a Bandwidth of 20.0 GB/s. I've tried uninstalling, reinstalling drivers, restarting, multiple times, but to no avail.

I am going to try to reseat the card and hope to god that fixes the issue.

Any advice will be much appreciated.

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Phew, that did the trick. I reseated the card, and now it's all showing correctly on GPU-Z and in CCC. Was getting worried!