Smallpt is another demanding computational test like C-Ray -- it is a path-tracing test written in only 100 lines of C code. However, on the PandaBoard ES this test didn't fair as well as it did in C-Ray where it outperformed the Atoms. Instead, the OMAP4 system was quite a ways behind the Atom hardware.
In TSCP, a chess solving program, the Atom performance is more than twice as fast.
When doing VP8 encoding with Google's libvpx, the Atom hardware was about 50% faster. The old Pentium M was twice as fast and the old Core Duo T2400 was more than four times faster.
Lastly, with the x264 benchmark, in the stock configuration the ARM performance was not nearly as great as any of the tested Intel hardware.