HOT-555 - Fastest Pentium MMX?
Mike Paff
the HOT-555 rev 1.4.1?
Looking at the Pentium docs, I may be limited to 166 MHz (2.5x) if the
motherboard relies on the clock select pins being pulled high by the
CPU. In the MMX chips, one of the pins was changed to have an
internal pull-down resistor, so I may need to find 3.3V somewhere to
add an external pull-up resistor.
Another possible limitation is the current that can reliably be
supplied by the voltage regulators. Does anyone know if the
regulators will support the needs of a 233 MHz MMX?
Thanks
Mike
Fred Hall
works. You can try to overclock the bus to 75MHz to get 266MHz out of it.
My machine almost worked there, but kept crashing at random times in Win2000
so I had to set it back to 66MHz. I assume one of my peripheral cards or
RAM couldn't take the overclocking, since the CPU should have been fine with
that small increase.
"Mike Paff" <mike...@san.rr.com> wrote in message
news:3fmh7t479526e1t06...@4ax.com...
Mike Paff
>The highest Pentium MMX "supported" is 233MHz...I'm running one so I know it
>works. You can try to overclock the bus to 75MHz to get 266MHz out of it.
>My machine almost worked there, but kept crashing at random times in Win2000
>so I had to set it back to 66MHz. I assume one of my peripheral cards or
>RAM couldn't take the overclocking, since the CPU should have been fine with
>that small increase.
Thanks for the information. However, I think that you have a newer
version of the 555 motherboard than I do since mine doesn't have
an option for 75 MHz bus speed. So the fact that your board will
support a 233 MHz processor doesn't necessarily mean that
mine will.
Mike
>"Mike Paff" <mike...@san.rr.com> wrote in message
>news:3fmh7t479526e1t06...@4ax.com...
>> Does anyone know what is the fastest Pentium MMX speed supported by
>> the HOT-555 rev 1.4.1?
>>
>> Looking at the Pentium docs, I may be limited to 166 MHz (2.5x) if the
>> motherboard relies on the clock select pins being pulled high by the
>> CPU. In the MMX chips, one of the pins was changed to have an
>> internal pull-down resistor, so I may need to find 3.3V somewhere to
>> add an external pull-up resistor.
>>
>> Another possible limitation is the current that can reliably be
>> supplied by the voltage regulators. Does anyone know if the
>> regulators will support the needs of a 233 MHz MMX?
>>
>> Mike
Fred Hall
Go to the Shuttle web site and look at the online documentation they have
for the 555A -NOT- the manual. The manual doesn't show the 75MHz and 83MHz
jumper settings, but there's some online docs that do. I don't have the URL
since I printed out hardcopies about 10 months ago.
Good luck,
Fred
"Mike Paff" <mike...@san.rr.com> wrote in message
news:6j3n7t4tvl6hv0tb5...@4ax.com...
Mike Paff
>Mike,
>
>Go to the Shuttle web site and look at the online documentation they have
>for the 555A -NOT- the manual. The manual doesn't show the 75MHz and 83MHz
>jumper settings, but there's some online docs that do. I don't have the URL
>since I printed out hardcopies about 10 months ago.
I've looked at the web site, and the 75 MHz and 83 MHz settings weren't
added until HOT-555 version 1.5x and HOT-555A version 3.x respectively.
Also, according to the web site, the fastest MMX supported is 166 MHz.
I'm trying to determine if this limitation is real, or if it can easily be
worked around.
As I said before, my board is a HOT-555 version 1.41 - almost the oldest
version of the 555 officially released, so it doesn't have a lot of the
bells and whistles that the newer versions have.
But, thanks again for trying to help.
Fred Hall
got the 555A 3.2
Good luck in your quest...
Fred
"Mike Paff" <mike...@san.rr.com> wrote in message
news:giuo7ts8r1qaps1p2...@4ax.com...
Whodunit?
jumper settings for FSB speeds?
Thanks
Joe
"Fred Hall" <fha...@twcny.rr.com> wrote in message
news:PbVe6.29352$o91.2...@typhoon.nyroc.rr.com...
Fred Hall
Go to http://www.spacewalker.com/english/support/faq/faq.htm
Then in the section for "Mainboard jumper settings" on the "Intel" line go
over to "Socket7" and pull down 555A...it'll take you to the jumper setting
page.
Good luck,
Fred
PS Sorry I took so long to get back to you...I was away on travel for work
last week.
"Whodunit?" <no...@nic.net> wrote in message
news:zShf6.90163$HE2.7...@news1.onlynews.com...
DavidJ
v3.2 so would appreciate knowing this. Email me if you want or post here.
Thanks in advance,
Davidj
"just me" <sp...@zzzzzzzt.net> wrote in message
news:3a78e8b5...@news.mindspring.com...
> Although not a pentium, I have a K6-266 on a HOT-555a v3.2.
> I am not positive of that version but it was the last
> version. I had to trick the mb in to supplying 2.2 volts for
> the K6-266.
DavidJ
1Kohm with only about .1 difference in the core floating voltage. Installed
processor at 66 bus w/2x multiplier (I think the K6-2 chips interpret this
as 6x, however it may only be the K6-2+ ((mobile)) chip that does this) and
it's detected as an Intel 486 special at 66Mhz so I stopped there. I don't
have original manual, only one I downloaded and a few updates from Shuttle's
site. The update says there is another jumper to set for the K6 but doesn't
identify it.
If there is more info on this board will you point me to it? If not, what is
the other jumper I need to set? Also, what is the jumper JP37? (I think it's
for 5v and 3.3v RAM but don't want to burn up a stick trying to find out.
:-)
My BIOS is WIQ09, do I need to update to WIQ0H?One last thing, the board is
stamped JPA, JPB & JPC will yield a multiplier up to 5.5x (in case the 2x is
not interpreted as 6x I might be able to use this feature if available.
Thanks for your help,
Davidj
"just me" <sp...@zzzzzzzt.net> wrote in message
news:fl7h9tkkrcsfja7pv...@4ax.com...
> On Sat, 24 Feb 2001 23:51:07 GMT, "DavidJ" <davi...@worldnet.att.net>
wrote:
>
> >How did you trick it to 2.2v? I have a K6-2/400 I want to run in a
HOT-555
> >v3.2 so would appreciate knowing this. Email me if you want or post here.
> >Thanks in advance,
> >Davidj
> >
> The 555a does not have a 2.2 volt setting for the amd k-6 266 cpu. The
manual
> says it supports the cpu and says to set the core voltage to 3.2 volts,
this is
> .7 volts above maximun and 1 volt above typical recommended voltage for
the cpu.
>
> I dug around on the mb and now have a k-6 266 up and running fine at the
proper
> 2.2 volt core.
>
> (THE FOLLOWING ASSUMES YOU KNOW HOW TO SOLDER, SET JUMPERS ,
> AND WORK INSIDE YOUR COMPUTER.
> PROCEED AT YOUR OWN RISK ! ! )
>
> How?
>
> The trick:
> You need two jumper caps and a 1000 ohm resistor. Measure the resistor and
make
> sure it is at least in the upper 900's; if lower, the voltage can be too
high!
> If you can find an exact 1000 then use that. Wattage doesn't seem to
matter so
> much, except for the room the resistor takes up. I used 1/8 watt.
> Solder the resistor to the jumper caps:
>
> <cap>-----www------<cap>
>
> You may want to insulate the resistor wire with some insulation from a
piece of
> telephone wire.
>
> Place one jumper cap on jp39 pins 2-4
> Put the other cap on jp44, remove the existing cap of course.
> jp33 is jumpered 1-2, 3-4
> jp34 is open
>
> Test with no cpu installed and the computer TURNED OFF. You need three
pieces of
> phone wire about 2 inches long and stripped about 1/4 inch on each end.
> Open the ziff socket and insert a wire in hole A3 , this is Vss or ground.
> Insert a wire in hole A7 , this is Vcc2 or the core voltage.
> Insert a wire in hole E37 , this is Vcc3 or the I/O voltage.
> Close the ziff.
> MAKE SURE THESE WIRES ARE NOT TOUCHING ANY OTHER COMPONENT OR EACH OTHER
!
>
> Turn on the computer.
> Test the voltage from Vss to Vcc2, it should be at or VERY near 2.2 volts.
> Test the voltage from Vss to Vcc3, it should be at or VERY near 3.3 volts.
> If voltages aren't right then check your work .
>
> If all is ok then turn off the computer, open the ziff and remove the
wires from
> it. Put your k-6 266 in the ziff <I assume you have a fan on it>, close
the ziff
> and turn the computer back on. It *should* boot up saying it has a K-6 266
in
> it. If not then you may need to flash your bios up to version 0E.
>
> end
DavidJ
for this board but, went to their ftp site and found another with a number 2
in the name. Downloaded that and it is the correct one, questions are
answered. Flashed the BIOS and processor is recognized as a K6.
What kind of RAM are you running? I want to upgrade to 64M in DIMM's and saw
I have to use two double-sided 32M sticks. Is this still true?
Thanks,
Davidj
"just me" <sp...@zzzzzzzt.net> wrote in message
news:fl7h9tkkrcsfja7pv...@4ax.com...
> On Sat, 24 Feb 2001 23:51:07 GMT, "DavidJ" <davi...@worldnet.att.net>
wrote:
>
> >How did you trick it to 2.2v? I have a K6-2/400 I want to run in a
HOT-555
> >v3.2 so would appreciate knowing this. Email me if you want or post here.
> >Thanks in advance,
> >Davidj
> >
DavidJ
the voltage, once I get the correct resistor and solder it in I won't be
worried about causing a short. When I get 100 Mhz DIMM's I'm going to try
the 83 bus. Will let you know if interested.
Thanks again for the tips.
Davidj
"just me" <sp...@zzzzzzzt.net> wrote in message
news:sbuk9tkkdjpuu07n0...@4ax.com...
> On Mon, 26 Feb 2001 01:20:02 GMT, "DavidJ"
<davi...@REMOVETHISworldnet.att.net>
> wrote:
>
> >Please ignore the previous questions, I downloaded the manual Shuttle had
> >for this board but, went to their ftp site and found another with a
number 2
> >in the name. Downloaded that and it is the correct one, questions are
> >answered. Flashed the BIOS and processor is recognized as a K6.
> >What kind of RAM are you running? I want to upgrade to 64M in DIMM's and
saw
> >I have to use two double-sided 32M sticks. Is this still true?
> >Thanks,
> >Davidj
> >
> Yes it is still true. The chipset on the 555a doesn't address the higher
density
> memory chips on the market today. I put all of two 16M simms on the
particualr
> 555a I had. You can find 32M simms still for around $59 a pop, but then
you get
> into the cascheing issues of the motherboard chipset if you go over 64
megs.
> Look on www.pricewatch.com or pricescan.com . From time to time you can
find the
> 32M double sided Dimms on computergeeks site www.compgeeks.com , but you
have to
> act fast!
> So, you put a K6-2+ 400 on the 555a and it runs fine?
>
Chris Cowles
Don't know the make, but it says 'Made in USA'. I think it might be TI? It
works fine. I took it out of a 569v2 to replace it with a 128MB stick.
Actually, I might be willing to part with the other 32MB DIMM that remains
on the board with the 128. I don't think the extra 32MB makes a big
difference for my purposes.
The code on the chips is
1st line: TI -10
2nd: TMS626812ADGE
3rd: 5E 7AA701 P
Chris Cowles
Gainesville, FL
"DavidJ" <davi...@REMOVETHISworldnet.att.net> wrote in message
news:6bim6.4512$gc7.3...@bgtnsc07-news.ops.worldnet.att.net...
DavidJ
to be 32M 3.3v SDRAM, both the same. I would like to have PC100 or PC 133.
What do you consider a fair price? Email me if you want.
Davidj
"Chris Cowles" <SpamMagn...@Bellsouth.net> wrote in message
news:ZcDm6.804$e37....@news3.atl...