CineBench is free.
CINEBENCH is a real-world cross platform test suite that evaluates
your computer's performance capabilities. CINEBENCH is based on
MAXON's award-winning animation software CINEMA 4D, which is used
extensively by studios and production houses worldwide for 3D content
creation. MAXON software has been used in blockbuster movies such as
Spider-Man, Star Wars, The Chronicles of Narnia and many more.
CINEBENCH is the perfect tool to compare CPU and graphics performance
across various systems and platforms (Windows and Mac OS X). And best
of all: It's completely free.
Another free alternative is NovaBench.
NovaBench is our popular component benchmark application for Windows,
and Mac OS X. It's the most convenient way to test and compare your
system's hardware and graphics capabilities. You can test your system; benchmark CPU, RAM, hard disks and 3D graphics.