Good news, Diamond graphics card buyers: you don't need to register to benefit from the company's warranty coverage. The company has updated its warranty terms to say one-year coverage now applies "from the date of purchase at retail," although you'll still need a sales receipt as evidence.
We criticized Diamond in our GeForce GTX 260 vs. Radeon HD 4870 1GB comparative because of its previous warranty page, which stated the following:
THIS WARRANTY IS ONLY APPLICABLE IF PRODUCT REGISTRATION IS RECEIVED WITHIN 30 DAYS OF THE DATE THE PRODUCT IS PURCHASED. TO BE ELIGIBLE FOR THIS WARRANTY. TO BE ELIGIBLE FOR THIS WARRANTY, YOU MUST REGISTER AT diamondmm.com
We brought this up with the company at CES, and Diamond responded by saying its warranty terms were being "conveyed incorrectly" by the previous page and the 30-day limit would be illegal, anyway.
In any case, the page has now been changed and no longer contains any mention of the registration requirement.