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From: crash on 21 Dec 2005 14:32
Hello;

I have problem getting the bios to recognize the (socket 478) P4-3.06
GHz (533 FSB, L2 cache:512KB, HT, C1/D1) (SL726) It keeps the
multiplier at 12x and cannot be changed even when it is set at
manual. It still recognizes the 1600 Mhz chip as the other selection.
When I put the old 1600 Mhz back in the bios immediately detects it
and sets the multiplier to 16x and the external frequency to 100.
When the 3.06 is installed the CPU external frequency can be changed
but when it gets up to about 188 MHz it throws up once the OS (Win XP
SP2) has just about loaded and you get the BSOD and a memory dump.
Hyperthreading is not shown on the bios screen. Vcore is set at 1.3v

The system is ASUS Mobo P4B533-E, Rev 1.02 with IAA version 2.2.2,
Intel chipset 845E. Antec 420 watt power supply, 2 512 meg DDR RAM
(PC2100) , additional hardware; ATI Video Card Radeon 8500 LE 128 mg
DDR RAM, dual Maxtor 60 Gig HD (RAID is not used), a DVD R/W, CD-R/W,
Adaptec AHA-2940U2W - Ultra2 SCSI and Compaq DDS4 20/40 GB DAT Drive.

I also have done the following without success of changing the CPU
multiplier;
Bios updates from version 1011 (which begins the support of 3.06HT) to
the latest bios revision of 1015 Beta 003.
(bios revision of 1015 Beta 003 contains the latest microcode)
Cleared the CMOS memory of system setup parameters.
Take out the SCSI card to see if that made a difference.

I explained the problem to ASUS support and received the following
response;
"This motherboard will support the 3.06ghz 533fsb processor since bios
1011 or later. Also you have to have pc board rev 1.02 or later.
Looking on Intel's website, you definitely have the right processor
for this board, but there appears to be a problem. The processor that
you have should register a multiplier of 23, not 12. If you cannot
change the multiplier to 23, and the external frequency to 133mhz,
then you will not be able to get the full speed of the processor.
This is an internal defect with the processor itself."

Any help or suggestions would be greatly appreciated!

From: Paul on 21 Dec 2005 18:53
In article <45iqf.34802$1g6.23785(a)fe08.news.easynews.com>, no(a)spam.invalid
(crash) wrote:

> Hello;I have problem getting the bios to recognize the (socket 478)
P4-3.06GHz (533 FSB, L2 cache:512KB, HT, C1/D1) (SL726) It keeps
themultiplier at 12x and cannot be changed even when it is set atmanual.
It still recognizes the 1600 Mhz chip as the other selection.When I put
the old 1600 Mhz back in the bios immediately detects itand sets the
multiplier to 16x and the external frequency to 100.When the 3.06 is
installed the CPU external frequency can be changedbut when it gets up to
about 188 MHz it throws up once the OS (Win XPSP2) has just about loaded
and you get the BSOD and a memory dump.Hyperthreading is not shown on the
bios screen. Vcore is set at 1.3vThe system is ASUS Mobo P4B533-E, Rev
1.02 with IAA version 2.2.2,Intel chipset 845E. Antec 420 watt power
supply, 2 512 meg DDR RAM(PC2100) , additional hardware; ATI Video Card
Radeon 8500 LE 128 mgDDR RAM, dual Maxtor 60 Gig HD (RAID is not used), a
DVD R/W, CD-R/W,Adaptec AHA-2940U2W - Ultra2 SCSI and Compaq DDS4 20/40 GB
DAT Drive.I also have done the following without success of changing the
CPUmultiplier;Bios updates from version 1011 (which begins the support of
3.06HT) tothe latest bios revision of 1015 Beta 003. (bios revision of
1015 Beta 003 contains the latest microcode)Cleared the CMOS memory of
system setup parameters.Take out the SCSI card to see if that made a
difference.I explained the problem to ASUS support and received the
followingresponse;"This motherboard will support the 3.06ghz 533fsb
processor since bios1011 or later. Also you have to have pc board rev 1.02
or later.Looking on Intel's website, you definitely have the right
processorfor this board, but there appears to be a problem. The processor
thatyou have should register a multiplier of 23, not 12. If you
cannotchange the multiplier to 23, and the external frequency to
133mhz,then you will not be able to get the full speed of the
processor.This is an internal defect with the processor itself." Any help
or suggestions would be greatly appreciated!

******

This is not "an internal defect with the processor itself" !

You bought a Mobile processor. These are designed with a hardware
control signal on the outside of the processor, that is used to
change the speed. There is a low multiplier and a high multiplier,
and only a mobile chipset has the controls needed to change from
one to the other. Unfortunately, the signal sequence is dynamic,
so busting off pins or shorting stuff with wire tricks, is not
enough to change speeds.

http://processorfinder.intel.com/scripts/details.asp?sSpec=sl726

If you plug one of those processors into a board with a desktop
chipset, the desktop chipset lacks the hardware controls to
change the multiplier. (Some of the signals used are GHI# and
DPSLP).

Depending on the stepping of Mobile processor, these can be
great overclockers. They are best suited for FSB800 motherboards.
A P4C800-E Deluxe would be the best platform to use one of
those processors. With FSB and memory in sync, you can run
3.6GHz/FSB1200 and memory at DDR600 (one or two sticks of the
fastest DDR you can buy). The reason your current motherboard
is barfing, is it doesn't have the "headroom" to lift the FSB
like a P4C800-E does. In other words, the people who overclock
these processors regularly, like them because the multipler
is at x12, and you can use so much bus frequency with them.
The memory bandwidth potential is massive.

If the Asus Tech support had looked up the SSPEC, they would
have realized the difference between an ordinary 3.06/FSB533/512KB
Northwood with x23 multiplier, and the 3.06/FSB533/512KB mobile
with its two-valued multiplier. Only the lower value is
available with a desktop chipset, so either a good overclocker
motherboard like a P4C800-E Deluxe is needed, or find a
S478 motherboard with mobile chipset (if there is such a
thing).

I would expect that processor would fetch a good price on Ebay,
if buyers realize what it is.

HTH,
Paul
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