For a more reasonably sized, if less complete, set of gaming and DirectX numbers, try Unigine Heaven. Heaven's sandbox nature is a revelation in synthetic benchmarks. It's a hoot to click out of the preset paths and explore the environment, moving the camera with gaming-standard WASD keyboard controls. On top of that, Heaven may be the best-looking DX11 benchmark around--some of the views are stunning. The basic version is free.
The Company Suits
On the opposite end of the spectrum is the dowdy, bespectacled Prime95 (available in 32-bit and 64-bit versions), which is disguised as an innocent mathematical research program. Don't be fooled: It's nothing less than a cattle prod for your CPU. The free utility is well known in the performance-computing community, as system builders typically test their CPU, memory, and overclock settings with Prime95 by running the built-in stress test for a few cycles. If you have issues with your hardware, or if your cooling isn't up to snuff, you'll find out in short order.
In addition to catering to gamers, Futuremark is appealing to mainstream users with PCMark. Though the previous version had some issues with Windows Vista, PCMark 7 manages to be a credible, modern re-creation of the desktop-performance benchmarks so popular in the '90s. It skirts some of the criticisms leveled at synthetic benchmarks by using code snippets from popular commercial applications, and by timing the execution of prescripted procedures to run through them. As the name implies, though, it's for Windows 7 only. The basic edition is free.
Among system-wide benchmarks, Passmark's Performance Test 7 (for 32-bit and 64-bit systems) is the respectable child of the family--it went to school and got good grades, and it wears a neatly tailored suit. The 3D tests in this tool show you sober models of jets and evergreens, which is something of a relief after all the roaring dragons, battling spaceships, and whatnot featured elsewhere. Conceptwise, it mixes and matches some of the best ideas from all the packages here. You'll find no free version, however; Passmark offers just a free 30-day trial for this $24 program.