AOpen AX6BC Pro II Millennium Ed  - Page 4

Most BX boards I have tested have very similar performance – their WinBench 99 CPUmark and FPU Winmark scores are within a whisker of each other, enough for variations to be considered experimental errors. This motherboard is no different.

WinBench 99/CPUmark 99

AOpen AX6BC Pro II @ 558MHz 42.6
Abit BX6-R2 @ 558 MHz  42.9
Abit BE6-II @ 558 MHz 43.0

WinBench 99/FPU Winmark

AOpen AX6BC Pro II @ 558MHz 2840
Abit BX6-R2 @ 558 MHz  2810
Abit BE6-II @ 558 MHz  2850

The AOpen design philosophy has always been to build stable motherboards, rather than to provide edge-of-the-seat overclocking facilities. Having said that, this motherboard does provide for the CPU core voltage, and the front-side bus to be set via the BIOS. There are a total of 16 front-side bus settings from 66MHz to 153 MHz (including 103,112,117,124,129 and 133MHz). The PCI bus speed divider is selected automatically.

AGP clock speed divider has to be selected via jumper – and has 1/1 and 2/3 settings. The lack of a 1/2 divider means that for in most cases, front-side bus speeds above 133MHz are not usable with AGP cards, as the AGP bus will be pushed way beyond specifications. This is a limitation of the BX-chipset rather than an issue with this motherboard.

While the overclocking facilities would suffice for the casual overclocker, but I suspect the hard-core overclockers would insist on more elaborate overclocking facilities such as Abit’s SoftMenu III.

Overclocking test (Intel Pentium III 450MHz):

Overclocked Speed/ CPU Voltage CPUMark FPU WinMark
450Mhz/2.0V (default) 34.5 2270
558Mhz/2.1V 42.6 2840
581Mhz/2.3V 44.4 2910
600Mhz Failed Failed

The lack of any L2 cache latency tweak capability meant that I could not push the CPU to 600MHz (as is possible with my usual Abit BX6-R2 motherboard). However, this is largely academic as my AGP card is not stable at the high AGP bus speed (133 * 2/3 MHz) anyway.

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