HD 6950 - Memory clock

[XSR]

http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1041&lid=1&pid=1235&leg=0

It says here that the memory clock is 5000MHZ, but in mine it's 1250MHZ in stock. How is this possible?

Thanks.

 

[suat]

I think it is dual-channel and double-data rate. That means dual (2) times double (2) makes 4 and 4 times 1250 MHz makes 5000 MHz. Pls see http://en.wikipedia.org/wiki/GDDR5