Performance
ctcm Benchmark results
The bus speeds 50, 55 and 60 MHz would all run at the fastest timing settings. Higher bus speeds, however, may required the tuning of the BIOS timing settings. In my case (45 ns EDO or 12ns SDRAM) I could leave the same maxed out BIOS settings for all speeds.
| Bus Speed [MHz] | Main Memory Speed [MB/s] with EDO | Main Memory Speed [MB/s] with SDRAM |
|---|---|---|
| 50 | 33.1 | 37.0 |
| 55 | 36.6 | 40.9 |
| 60 | 39.8 | 44.5 |
| 66(max timing) | 44.2 | 49.6 |
| 68(turbo frequency) | 45.3 | 50.7 |
| 75 | 49.8 | 55.8 |
Other Benchmark Results
| CPU Speed [MHz] | Winstone 97 with EDO | Winstone 97 with SDRAM | Quake Timedemoboth RAM types give the same frame rate |
|---|---|---|---|
| 166/66 | 37.6 | 37.6 | 14.7 |
| 171/68 (turbo) | 37.8 | 38 | 15.1 |
| 187.5/75 | 40.1 | 40 | 16.6 |
| 200/66 | 39.1 | 39.7 | 15.7 |
| 205/68 (turbo) | 39.9 | 40.1 | 16.1 |
Winstone 97 ran at the following configuration: Windows 95, built 950, Resolution 1024x768x256x60, Bus Master DMA drivers, Diamond Stealth 64 Video VRAM 2 MB, Quantum Fireball 1280A
The Winstone 97 results show that there's hardly any difference between EDO and SDRAM equipment, due to the bad design of the VX chipset, which is unable to use SDRAM properly. It also shows that 187.5/75 is equal to 205/68 in terms of Windows software. However, Quake is able to show the right way by running considerably faster at 187.5/75.
The Winstone results are slightly slower than the results of the IT5H.
