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Author Topic: BE6 CPU upgrade after TH flash
Arbi32
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posted August 04, 2001 01:45     Profile for Arbi32   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Hey all. I just flashed a BE6 system to the newest firmware of TH. I now want to install my new CPU of 800MHZ. However, in CPU soft menu I choose 800MHz and save/quit and when I reboot I receive error message:

CPU is unworkable or has been changed. Please recheck CPU softmenu.

I retry over and over and no good. I also try with my freinds 733MHz, same problem. I then reput in my old 550MHZ and its ok This is consistant with 2 different BE6 Motherboards! Anyone know how to fix this? Does the BE6 motherboard really support up to 850MHz??

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Vandergaart
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posted August 06, 2001 15:38     Profile for Vandergaart   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Disable Speed Error Hold option in SoftMenu.
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Arbi32
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posted August 06, 2001 16:24     Profile for Arbi32   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
What do you mean? Where do I disable speed error?? Hold option? Please explain!!
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Vandergaart
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posted August 06, 2001 18:58     Profile for Vandergaart   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
In bios in CPU SoftMenu set CPU Operating Speed to User Define, Ext. Clock (PCI) to 100MHz(1/3), AGPCLK/CPUCLK to 2/3 and Speed Error Hold to Disable. Don't bother with Multiplier Factor setting
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Arbi32
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posted August 07, 2001 06:54     Profile for Arbi32   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Great!! It worked. The problem was the cpu's external clock was 133Mhz, so I needed to use a PC133 strip of ram and also set the Ext. Clock (PCI) to 133MHz(1/3) now I can see the full 800MHz!

Thanks for you're help Vandergaart!!!

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Vandergaart
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posted August 07, 2001 07:13     Profile for Vandergaart   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
So set it to 133(1/4) not 133(1/3)because You extremely overclock PCI bus with 1/3 setting and it can cause Your HDD to fail in DMA mode etc
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Arbi32
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posted August 07, 2001 07:19     Profile for Arbi32   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Really? What if I use SCSI Adaptec Ultra 160 card and drives? Still set it at 1/4?
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Vandergaart
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posted August 07, 2001 07:27     Profile for Vandergaart   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Yes - this is PCI clock divider, when it is set to 133/3 PCI clock is set to 44 MHz which is set far above specification (33MHz). It can cause instabilities, loss of data and sometimes can damage Your PCI components (which is rare but it could happen). So set it to 133/4 (=33MHz) if BE6 supports it (I can't exactly remember if it supports it but I believe it is).
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Arbi32
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posted August 07, 2001 07:36     Profile for Arbi32   Author's Homepage     Send New Private Message   Edit/Delete Post   Reply With Quote
Ok great! Hey once again thanks for your time and help!!

It was very helpful!!

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