We recently got our hands on a pair of Diamond’s Viper HD 2900 XT 1GB cards  and have compared their performance to the original 512MB Radeon HD 2900 XT, and to a trio of GeForce 8800 series cards, all running in both single- and multi-GPU CrossFire and SLI configurations.  We also talk about the card’s bundle and overclockability.  Click the link below and check it out, we definitely had some interesting results...

Diamond Viper HD 2900 XT 1GB CrossFire

why were the 7.4s used?

Shoot.  That's a typo in the test system section which was cut and pasted from an older article.  I actually used the 7.9s.  Fixing now.  Thanks!