Megatrends HX83 P166: (Bus Mhz/CPU MHz) 66/166 vs. 75/150 vs. 83/166 vs 83/166 (55nS)

MrBios 3.31 Micron EDO (2-32M Simms) Imagine 128-2 (4M VRAM) Adaptec 2940UW Cheetah ST34501W(FAT32) OSR2

Note: The 66/166 marks were run using Toshiba PEDO. The remaining marks are for Micron EDO. The memory timing was set to 60nS except for in the bottom bar where 55nS data is shown. These data show that, with an HX83, there is the potential to significantly boost P166 performance. Perhaps most interesting is that underclocking the P166 to 150 and increasing the bus to 83MHz increases performance over that of the standard 66/166 configuration. The P166 (non mmx) does not run at 200 (3X66). It is fragile at 188 (2.5X75). It runs fine at 180 (3X60) but there is no advantage. There are two ways to hit 167 -- 2.5X66 and 2X83. Peripherals permiting, 2X83 might be worth considering. (I suspect that these scores will be higher with the new AMI BIOS.

• Top bar: 66MHz bus 166MHz CPU - 60nS, Disclosure
• Second bar: 75MHz bus 150MHz CPU- 60nS, Disclosure
• Third bar: 83MHz bus 166MHz CPU- 60nS, Disclosure
• Bottom bar: 83MHz bus 166MHz CPU- 55nS, Disclosure