pIII Vmod

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pIII_Man

Splendid
Mar 19, 2003
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Here goes...i have been attempting to make my pentium III default at 2.05 volts according to many sources including intel spec sheets the only necissary thing to get this 1.65 volt processor running @ 2.05 volts is to cover pin B119 (vid 3). Well i have done this however now my cpu is detected as a pentium III 466E (which was never made) and on top of that the voltage is still 1.65 volts!
The system is
msi 6163pro
pIII 700E (slot 1 @ 1.65 volts) running 945mhz @ 2.0v 32c Cb0
512mb mushkin pc150
rage pro (don't laugh)

Any help would be appreciated

There is no smell better than fried silicon :evil:
 
Hehe, no, I think that's wrong, let me check and get back to you.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
whats wrong?

<A HREF="http://www.intel.com/design/PentiumIII/datashts/24445209.pdf" target="_new">http://www.intel.com/design/PentiumIII/datashts/24445209.pdf</A>

page 19
page 72

There is no smell better than fried silicon :evil: <P ID="edit"><FONT SIZE=-1><EM>Edited by pIII_Man on 07/16/03 05:52 PM.</EM></FONT></P>
 
Confirmed, you need to CONNECT B119 to VSS in order to raise the core voltage.

What probably happened with the frequency is that the processor quit responding, and the board then rebooted while defaulting to a 66MHz bus.

You must have gotten confused by Intel's backwards numbering. 0 means ON and 1 means OFF, completely backwards from industry standard!

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
what do ya think...should i pull out the soldering iron...or is my cpu close to its physical limits already. I have heard that cB0 pIII's overclocked very well...but i guess mine is an exception.

There is no smell better than fried silicon :evil:
 
cBO was the FIRST stepping for the PIII 700. Most reach 933MHz quite easily, usually requiring around 1.75v core for 100% stability. Get out the solder gun and make it 2.05v, then knock the voltage down to 1.85v by taping over VID2! If you like, you can tape over VID1 to get 1.75v from 1.85v.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
well i did the vmod and it worked ok...i was wondering though...i have a seatle 440bx board and a 400mhz pII that i know for sure can run @ 4x 133...if i modified the BSEL1 pin would my mobo auto detect the pII as a 133mhz fsb processor? Or since the board doesnt officially support 133mhz fsbs would it be detected as a 100mhz fsb cpu?

Thanx for the help

There is no smell better than fried silicon :evil:
 
It would still come up as 100MHz bus because of your board. But your board is so old that it's supported by SoftFSB.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
hey...don't call my board old!

I was thinking of getting a 1.2ghz celeron what do you think that would clock to...on my msi board

There is no smell better than fried silicon :evil:
 
I tell everyone to get 1.1GHZ tualatin celleries just to increase their chances of reaching 133MHz bus speed or greater. It really sux to get a 1.2 thinking it will overclock better, then finding out it doesn't, and getting stuck with an inferior bus speed.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
a while back you said that the msi 6163 was vrm 8.4 compatable would that mean that i just need a standard slocket adapter and that's it...

There is no smell better than fried silicon :evil:
 
You'd need a standard Tualatin adapter for a Tualatin CPU because of the changed pin assignments, but the Upgradeware Slot-T only cost $20, and offers voltage detection (VID pin) adjustments! You can find non-adjustable adapters on eBay for around $10...but manual voltage adjustment is more reliable than BIOS (BIOS voltage adjustments don't work until POST).

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
would be interesting to see a PIII on 90nm process, SOI, all the other crap they do these days...

How would that perform?

---
$hit Happens. I just wish it would happen to someone else for a change.
 
well the thing that IMO held the pIII back even at high clock speeds was the bus...i think that a pIII w/ a ddr bus and newer instruction sets would do very well compared to a p4...

But then again this is starting to sound alot like a pentium M cpu...

3 386DX-25's...12 volts...glue some ln2 and a wicked amount of overclocking and you get a willamantee minus 36 pins, 33.75 million transistors and a couple hundred mhz... 😎
 
Hehe, the PIII-M CRUSHES the P4 desktop CPU in performance, clock for clock.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
actually pIII m's are still the only intel cpu that i have seen in tablet pc's (i have seen some transmetas however)...
Possibly because a pIII ulv uses so little power?
Does intel still produce desktop versions of pentium III's? Or are shops just selling what's left in stock?

If i put my k6 in a Ferrari it would be faster than your your pentium 4 or Athlon XP :tongue:
 
I don't think they produce PIII's any more, but I think they produced an excess of them for warehousing as replacement parts.

They MIGHT still produce Tualatin versions, I'm not certain.

<font color=blue>Only a place as big as the internet could be home to a hero as big as Crashman!</font color=blue>
<font color=red>Only a place as big as the internet could be home to an ego as large as Crashman's!</font color=red>
 
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