Modders-Inc posted a review on the SAPPHIRE HD 4670 GDDR4
A quote from the article:
>> SAPPHIRE HD 4670 GDDR4 Review
Sapphire has a track recorded of taking the reference designs from AMD/ATI and pushing them up a notch or two. The SAPPHIRE HD 4670 512MB GDDR4 is another fine example of their hard work.
>> SAPPHIRE HD 4670 GDDR4 Review