(http://img3.imagebanana.com/img/hz0w63o2/stefan.rc25033.png)
Download whitepaper here (http://domino.research.ibm.com/library/cyberdig.nsf/papers/EFE521AB23A0D28B85257784004DC9DD/$File/rc25033.pdf)
Further reading:
Believe it or Not! Multicore CPUs can Match GPUs for FLOP-intensive Applications (http://www.geeks3d.com/forums/index.php/topic,1208.0.html)