Our testing methods
All tests were run three times, and their results were averaged, using the following test systems.

ProcessorAthlon 64 3200+ 2.0GHz
Front-side busHT 16-bit/1GHz downstream
HT 16-bit/1GHz upstream
MotherboardAbit KV8 Pro
North bridgeVIA K8T800 Pro
South bridge VIA VT8237
Chipset driverVIA Hyperion 4.51
Memory size512MB (1 DIMM)
Memory typeCorsair XMS3500 DDR SDRAM at 400MHz and 2-7-3-3 timings
GraphicsATI Radeon 9550 128MB (128-bit)NVIDIA GeForce FX 5200 Ultra 128MBS3 DeltaChrome S4 Pro 128MB
Graphics driverCatalyst 4.7ForceWare 56.726.14.10.1668-15.10.04.c
Storage

Western Digital WD360GD 10,000RPM Serial ATA hard drive

Operating SystemWindows XP Professional
Service Pack 1 and DirectX 9.0b

To put the S4 Pro's performance in perspective, I've rounded up ATI's Radeon 9550 and NVIDIA's GeForce FX 5200 Ultra for comparison.

We used the following versions of our test applications:

The test systems' Windows desktop was set at 1024x768 in 32-bit color at a 75Hz screen refresh rate. Vertical refresh sync (vsync) was disabled for all tests. All of the 3D gaming tests used the high detail image quality settings except where otherwise noted.

All the tests and methods we employed are publicly available and reproducible. If you have questions about our methods, hit our forums to talk with us about them.