I have a Zotac Geforce GTX 670 AMP! Edition, which has a core clock of 1098 MHz, but when i ran 3d Mark 11 (the free "standard" preset), the results tell me its running at about 862 MHz. why is it running so slow? Is there another way to test my core clock speed?
http://i.imgur.com/Nr8wQIS.jpg
http://i.imgur.com/Nr8wQIS.jpg