No 1/4 PCI divider on Aopen AK73 Pro set to 133 FSB

Duken4evr

Junior Member
Mar 10, 2001
6
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0
I have a new AOpen AK73 Pr0 (KT133A) with a 1 gig T-bird. I had an AOpen AX6BC (BX) before and this was an awesome board! This engendered some now apparently misplaced brand loyalty in AOpen. On to the story.

I unlocked the CPU with conductive ink using a magnifying glass and a needle. I can manipulate my multiplier fine.

The problem is when I lower the multiplier to 7.5 and jumper the board to 133, my PCI clock hits a staggering 44 MHz! SiSoft Sandra reports this and the 1/3 divider. Naturally, the computer locks up hard a short time after that.

I am currently running 11.5X106 fine, but am being denied 133 FSB goodness. I have scoured my BIOS and see nothing about the PCI clock. I thought it was supposed to be automaticly done by the clock generator on the motherboard. What gives? Heat does not seem to be an issue, I have the big Taisol 792 cooler with a screaming loud Delta Fan on it, even after hours of UT it never gets over 96F or so.

Aside from this problem and it being more finicky while burning CD's (helped by disabling DMA in CD properties) the board seems OK, but I am kinda wishing I had gotten an Abit...
 

AlanShearer

Member
Dec 6, 2000
35
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There is a known bug in Sisoft Sandra which makes it misreport the PCI speed on the KT133a chipset when working at 133MHz. It's mentioned on the Sisoft website)

The PCI bus is working at 33MHz (via a 1/4 divider) so there is no need to panic.
 

Duken4evr

Junior Member
Mar 10, 2001
6
0
0
Thanks for the info, your post caused me to focus on other issues than the "false" PCI speed issue I fixated on.

I disabled AGP 4X in BIOS. Problem solved!

Whoo Hoo!!!!