appiah4 wrote:What revision is your BX2000+? I believe not all of them handle Tualatins.
Batyra wrote:But this is not the end of the story... After placing CPU in right position system boots, and cpu was recognised but it get allways stuck on screen before memory test... always when the FSB is set above 100MHz... if fsb is 100 system loads, if higher stuck before memory check...
I've tested all the memory i have PC100, PC133, PC150... always the same... I hope it is the matter of that missing pin... I'm waiting for a second Tualatin from a friend - I'll chceck then if it works properly - bul I'll have Scyscraper's post and info about fsb in mind...
Thanks!
Batyra wrote:I tried two other PIII Tualatin SL5XL and SL6BY...
Situation is the same @fsb 112 (so 1.17GHZ) it runs... and above 112 it get stuck before the memory test
It seems like fsb jumpers on Upgradeware adapter are not working at all... so motherboard fsb has higher priority... similar with multiplier if I want to set to 14x100 it is seemed as 10.5x100 so 1.05... nothing more.
What else I can do to run it on 1.4?
Help!
Batyra wrote:@Apphia4
I tried with Canopus X20 (GF3) and GF4 Ti... PCI didn't want to boot.
This board also have two options for fsb133 one wigh PCI @33 and second one of CPI @43.3 (or something like that)
Do you have any idea what card I may use?
Batyra wrote:There is "Patch ID: none" so that may be the problem.
I have seen in the internet that there were two FDc bios'es... form 2002 and from 2004...
Here I found info about the 2004 one http://drivers.mydrivers.com/drivers/99_39828.htm
Maybe I'm useing wrong one?
@Scyscraper - did you also had "Patch ID: none"?
Can anyone of you help me find the bios... (I think I might used wrong one... so I'll try to flash it again, but it is hard to find it..)
Batyra wrote:Do you think it may be caused by a capacitor? One seems a little bulky, take a look.
Skyscraper wrote:With a slow CPU (P2 or slow P3) my BX2000+ will happily run 153 MHz FSB (AGP @102MHz, PCI @38MHz) with Nvidia video cards although perhaps not always 3D stable depending on the video card.
The faster the CPU the lower the max FSB gets. This motherboard (at least my board) has some odd timng bug/flaw/issue/"feature".
And an overclocked BX M/B can not be guaranteed a working of P-IIIs 1.4G.
Major reason is signal quality do not meet timing specific.
GA6BXC uses a ICS9148-26 for Frequency Generator.
But, this IC is designed for 100MHz FSB.
=> https://www.idt.com/document/dst/9148-26-datasheet
( on page 3, => Note1. Performance not guaranteed )
This means actual FSB can be reached up to 131%(174MHz) for one clock timing level.
By this reason, CPU can be overclocked for short time.
If lucky, ICS9148-26 does not go to 174MHz or CPU works at 174MHz for short time.
But, any case it is out of specific.
Next can help you to understand what is need to work CPU.
=> http://download.intel.com/design/Pentiu ... 526408.pdf
( page 22 to 55 )
Fixing will be simple and it is analog level works.
I do not have intent of changing any M/B function.
But, before measurement, I can not tell you which part or value will be changed.
And if big change is needed, I will ask you with details.
And M/B, MS6905 and CPU have signal quality control parts.
I will adjust only these parts.
All basic function will not be changed.
Modification key point is signal quality adjustment.
It is not adding or removing IC part.
After measurement of signal quality, adjusting value of resistor or capacitor.
Maybe, you will not know what is changed.
shamino wrote:Skyscraper wrote:With a slow CPU (P2 or slow P3) my BX2000+ will happily run 153 MHz FSB (AGP @102MHz, PCI @38MHz) with Nvidia video cards although perhaps not always 3D stable depending on the video card.
The faster the CPU the lower the max FSB gets. This motherboard (at least my board) has some odd timng bug/flaw/issue/"feature".
That sounds like it might be a limitation of the onboard power supply or voltage regulation. Higher clocked CPUs might be more sensitive, and if they draw more power then the board's VRM might not be as stable with them.
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