Yes,
http://www.guru3d.com/article/radeon-hd-7970-overclock-guide/14
The above score at Guru3D is with a 7970 overclocked to 1125 MHz on the memory and 6300 MHz
Then it's quite clearly rubbish, because here is my score from a stock I7 950 with my card at 1000mhz. It crashes if I go any higher.

As I said before a friend of mine runs an I5 2500k @ 4.6ghz with his 7970 @ 1100mhz score well over ten thousand.