Are you referring to the memory speed? The core clock is not 1800MHz, but if you are referring to the memory speed then it may be showing you the speed before calculating the effective speed (DDR).gtx does say it has 900 mhz clock which is supposed to be 1800 but I don't know.
I thought for sure you'd hit 20K.
Look at those SM scores though!
that does seem low,I get around 11K and you have a faster processor and 1gb more ram
well i know for a fact my bios isnt up to date either but i wont risk updating mine because ive never updated a bios before and i heard if you screw it up your mobo needs replacing or something
but you should have alot more points i should say