Funny OC failure

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB and
13.5 multiplier. I decided to have a play to try and tweak the OC so that
it ran closer to stock 3200 speed, so I tried 163FSB and 13x but it fails
to boot. Now that I dont understand, I could understand if I had upped the
FSB, but overall these settings are slower! Can anyone suggest why?

Stuart

 

[sunbow]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

you cant change the mulitplier on your chip. only the FSB. put it back at
13.5 and it should boot back up.
"Stuart Rogers" <me@privacy.net> wrote in message
news:Xns951C745354954stuartfreenews@130.133.1.4...
> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB and
> 13.5 multiplier. I decided to have a play to try and tweak the OC so that
> it ran closer to stock 3200 speed, so I tried 163FSB and 13x but it fails
> to boot. Now that I dont understand, I could understand if I had upped the
> FSB, but overall these settings are slower! Can anyone suggest why?
>
> Stuart

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"Sunbow" <mpick@mpick.karoo.co.uk> wrote in
news:XnCdnQpdEYBHfXrdSa8jmA@karoo.co.uk:

> you cant change the mulitplier on your chip. only the FSB. put it back
> at 13.5 and it should boot back up.
> "Stuart Rogers" <me@privacy.net> wrote in message
> news:Xns951C745354954stuartfreenews@130.133.1.4...
>> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB
>> and 13.5 multiplier. I decided to have a play to try and tweak the OC
>> so that it ran closer to stock 3200 speed, so I tried 163FSB and 13x
>> but it fails to boot. Now that I dont understand, I could understand
>> if I had upped the FSB, but overall these settings are slower! Can
>> anyone suggest why?
>>
>> Stuart
>
>
>

No I can change the multiplier just fine, it boots at 11x 12x 13x and 13.5x
with no problems all with 166 FSB. I only have a problem if I tweak the FSB
up or down from 166!

Stuart

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

On Sun, 04 Jul 2004 10:26:04 +0000, Stuart Rogers wrote:

> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB and
> 13.5 multiplier. I decided to have a play to try and tweak the OC so that
> it ran closer to stock 3200 speed, so I tried 163FSB and 13x but it fails
> to boot. Now that I dont understand, I could understand if I had upped the
> FSB, but overall these settings are slower! Can anyone suggest why?
>
Most likely cause. The KT600 chipset doesn't have a PCI/AGP bus lock, so
at 163MHZ FSB you've overclocked the PCI/AGP buses beyond where your (and
probably anyone elses) PCI/AGP devices will function. AT 163 it's using a
4 divider (pci=40.75 agp= 81.5), at 166 it uses a 5 (33/66).

Something else. It also may be overclocking the ram bus by 30Mhz.
Basically, you're overclocking a 133MHz FSB to 163. Ram bus usually
follows the FSB overclock.

To see this, try setting the FSB to 140 and then check your bus speeds.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
http://mysite.verizon.net/res0exft/cpu.htm

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"Stuart Rogers" <me@privacy.net> wrote in message
news:Xns951C8872EBC5Dstuartfreenews@130.133.1.4...
> "Sunbow" <mpick@mpick.karoo.co.uk> wrote in
> news:XnCdnQpdEYBHfXrdSa8jmA@karoo.co.uk:
>
> > you cant change the mulitplier on your chip. only the FSB. put it back
> > at 13.5 and it should boot back up.
> > "Stuart Rogers" <me@privacy.net> wrote in message
> > news:Xns951C745354954stuartfreenews@130.133.1.4...
> >> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB
> >> and 13.5 multiplier. I decided to have a play to try and tweak the OC
> >> so that it ran closer to stock 3200 speed, so I tried 163FSB and 13x
> >> but it fails to boot. Now that I dont understand, I could understand
> >> if I had upped the FSB, but overall these settings are slower! Can
> >> anyone suggest why?
> >>
> >> Stuart
> >
> >
> >
>
> No I can change the multiplier just fine, it boots at 11x 12x 13x and
13.5x
> with no problems all with 166 FSB. I only have a problem if I tweak the
FSB
> up or down from 166!
>
> Stuart

Yes, Sunbow was incorrect
You can set it to anything but (if it is lock'd) then it's only going to
boot at 13.5 no matter what..

166 -> 163 should leave you with no problems..
Tell us what else your changing

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"rstlne" <.@text.news.virgin.net> wrote in news:xK1Gc.593$Oh4.538
@newsfe2-win.ntli.net:

>
> "Stuart Rogers" <me@privacy.net> wrote in message
> news:Xns951C8872EBC5Dstuartfreenews@130.133.1.4...
>> "Sunbow" <mpick@mpick.karoo.co.uk> wrote in
>> news:XnCdnQpdEYBHfXrdSa8jmA@karoo.co.uk:
>>
>> > you cant change the mulitplier on your chip. only the FSB. put it
back
>> > at 13.5 and it should boot back up.
>> > "Stuart Rogers" <me@privacy.net> wrote in message
>> > news:Xns951C745354954stuartfreenews@130.133.1.4...
>> >> I am running a 2600 Barton on an Epox 8KRA2+ which will run at
166FSB
>> >> and 13.5 multiplier. I decided to have a play to try and tweak the
OC
>> >> so that it ran closer to stock 3200 speed, so I tried 163FSB and
13x
>> >> but it fails to boot. Now that I dont understand, I could
understand
>> >> if I had upped the FSB, but overall these settings are slower! Can
>> >> anyone suggest why?
>> >>
>> >> Stuart
>> >
>> >
>> >
>>
>> No I can change the multiplier just fine, it boots at 11x 12x 13x and
> 13.5x
>> with no problems all with 166 FSB. I only have a problem if I tweak
the
> FSB
>> up or down from 166!
>>
>> Stuart
>
> Yes, Sunbow was incorrect
> You can set it to anything but (if it is lock'd) then it's only going
to
> boot at 13.5 no matter what..
>
> 166 -> 163 should leave you with no problems..
> Tell us what else your changing
>
>
No it is not locked as I can boot at different multipliers all with 166
FSB and it boots fine at the correct speed for FSB x Multiplier.

Wes said that an FSB of 163 will probably use a divide by 4 for the PCI
speed giving a PCI clock much too fast to boot. I will try some more
combinations to see what happens

Stuart

 

[sunbow]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

nobody`s perfect.....
"rstlne" <.@text.news.virgin.net> wrote in message
news:xK1Gc.593$Oh4.538@newsfe2-win.ntli.net...
>
> "Stuart Rogers" <me@privacy.net> wrote in message
> news:Xns951C8872EBC5Dstuartfreenews@130.133.1.4...
> > "Sunbow" <mpick@mpick.karoo.co.uk> wrote in
> > news:XnCdnQpdEYBHfXrdSa8jmA@karoo.co.uk:
> >
> > > you cant change the mulitplier on your chip. only the FSB. put it back
> > > at 13.5 and it should boot back up.
> > > "Stuart Rogers" <me@privacy.net> wrote in message
> > > news:Xns951C745354954stuartfreenews@130.133.1.4...
> > >> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB
> > >> and 13.5 multiplier. I decided to have a play to try and tweak the OC
> > >> so that it ran closer to stock 3200 speed, so I tried 163FSB and 13x
> > >> but it fails to boot. Now that I dont understand, I could understand
> > >> if I had upped the FSB, but overall these settings are slower! Can
> > >> anyone suggest why?
> > >>
> > >> Stuart
> > >
> > >
> > >
> >
> > No I can change the multiplier just fine, it boots at 11x 12x 13x and
> 13.5x
> > with no problems all with 166 FSB. I only have a problem if I tweak the
> FSB
> > up or down from 166!
> >
> > Stuart
>
> Yes, Sunbow was incorrect
> You can set it to anything but (if it is lock'd) then it's only going to
> boot at 13.5 no matter what..
>
> 166 -> 163 should leave you with no problems..
> Tell us what else your changing
>
>

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

"Sunbow" <mpick@mpick.karoo.co.uk> wrote in message
news:EqCcneym-ecWr3TdSa8jmw@karoo.co.uk...
> nobody`s perfect.....


heh

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

> "rstlne" <.@text.news.virgin.net> wrote in message
> news:xK1Gc.593$Oh4.538@newsfe2-win.ntli.net...
>> > > "Stuart Rogers" <me@privacy.net> wrote in message
>> > > news:Xns951C745354954stuartfreenews@130.133.1.4...
>> > >> I am running a 2600 Barton on an Epox 8KRA2+ which will run at 166FSB
>> > >> and 13.5 multiplier. I decided to have a play to try and tweak the OC
>> > >> so that it ran closer to stock 3200 speed, so I tried 163FSB and 13x
>> > >> but it fails to boot. Now that I dont understand, I could understand
>> > >> if I had upped the FSB, but overall these settings are slower! Can
>> > >> anyone suggest why?
>> > >>
>> 166 -> 163 should leave you with no problems..
>> Tell us what else your changing
>>
He has a KT600 chipset and it doesn't lock PCI/AGP like an NF2 chipset.
Going from 166 to 163 could radically change the pci/agp/ram buses.

--
Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB)
http://mysite.verizon.net/res0exft/cpu.htm

 

[Guest]

Archived from groups: alt.comp.hardware.overclocking.amd (More info?)

> >> 166 -> 163 should leave you with no problems..
> >> Tell us what else your changing
> >>
> He has a KT600 chipset and it doesn't lock PCI/AGP like an NF2 chipset.
> Going from 166 to 163 could radically change the pci/agp/ram buses.
>

yeh yeh
I was wrong
but he read ur post first and said he seen it .. so there!