low ghz problem?

[awsomeness]

Hi i reciently just built a new pc with a i7 920 on the mobo EX58-UD3R and when i run cpu-z its showing my core speed as 1598.2 Mhz, that seems really low and im pretty sure its ment to be 2.6ghz can anyone please help me!

Thanks!

 

[awsomeness]

so if i put the processor under stress it should raise?

 

[awsomeness]

whats the best way for me to stress it out?

 

[awsomeness]

Thanks i ran prime95 and yes it went upto 2.8ghz thnx for the help! also under 100% load my cpu temps are around 57 - 63c is this normal for 100% load?