AMD 5x86 and BIOTEQ(Biostar) MB Compatibility Question
Samuel D. Tyszler
I have a BIOTEQ MB-1433/50UIV-A PCB Ver: 2 (A VLB Board)
The chipset model no is: 83C3498/9438AS
The BIOS in this system was replaced to enhance the support of my EIDE
card.
An AMI BIOS was installed. Here are the specs:
POST Ident. String: 40-P301-001437-0010111-072594-DGREEN
Some specifics:
--------------
Required Processor : 486
BIOS Size : 64K
Version : P3.1
REF# : 001437
DATE : 07/25/94
CHIPSET ID as reported : DGREEN
(BIOS information provided by AMI Setup v2.99 running under OS/2
(shouldn't
interfere with reading this type of info))
Motherboard doesn't support <5V processors. A transformer purchased from
JDR
should do the trick.
Is this configuration feasible with an AMD 5x86 processor?
Thanks for the help!
Happy NEW YEAR 1997!!!!!!!
--
-----------------------------------------------------------
- Tyszler
(tys...@mail.idt.net)
(tys...@juno.com)
(k5...@qcvaxa.acc.qc.edu)
(k5...@qcunix1.acc.qc.edu)
(wa...@earth.execnet.com) <===== Warp Nine Computer Svcs.
-----------------------------------------------------------
Ted Kroon
> -----------------------------------------------------------
Hallo Samuel,
I have also the same configuration with a AMI bios from dec. 1993.
Two weeks ago I have upgraded my 486-DX2 66 to Am 586-133.
At first I soldered regular type LT1085 on the mainboard and I only used
the output wire from the board, the earth and the 5 volt I become from
the power supplier.
With variabel resister I regulate the tension on 3.45 volt and I changed
the jumpers to this mode (JP14, JP16, JP27).
In this configuration runs this board at 100MHz, he only multiply with 3
instead of 4 .
That's my problem, I think that the Ami bios is too old.
If you have sugesting or you know anybody who can deliver me a newer
Bios, let me know!!
Good luck, bye
Ted Kroon (from Holland)
Rick Willardson
Hello Ted and All,
You know, I believe I am having the exact same problem. I just upgraded
to an Am DX5-133 (3.45V) (My 486-VLB motherboard has a jumper for 3 or 5
volt operation) and my motherboard will only multiply by 3 instead of 4.
(I believe I have different BIOS though)
Thus the best I can do is run at 120Mhz (40x3) My brother has this
exact chip, but his motherboard multiplies by 4 and he gets 160MHz. Of
course we both use fans and heatsinks for overclocking the CPU.
I also tried setting the jumpers on my motherboard for 50Mhz and thus
the CPU goes to 150Mhz (50x3)... But the computer crashes under heavy
load (It crashes within 10 minutes, and it seems to be due to heavy
load.)
I assume the crash is due to running the motherboard at 50Mhz.
So, is there a way for me to get my motherboard to multiply by 4???
Or is there another solution that I'm missing????
Thanks everyone!! I really appreciate any and all help!!
Rick W.
--
::=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=::
Rick Willardson, Hardware Design Engineer
ADC Kentrox, Portland, Or.
Alan Tasker
regulator (which you may not need), but also jumpers for the clock
multiplier and jumpers for cache write thru in case your board can,t
handle write back. benm...@ma.ultranet.com knows bettewr than I.
Dan Beacom
Rick Willardson <wil...@kentrox.com> wrote:
>Hello Ted and All,
>You know, I believe I am having the exact same problem. I just upgraded
>to an Am DX5-133 (3.45V) (My 486-VLB motherboard has a jumper for 3 or 5
>volt operation) and my motherboard will only multiply by 3 instead of 4.
>(I believe I have different BIOS though)
>Thus the best I can do is run at 120Mhz (40x3) My brother has this
>exact chip, but his motherboard multiplies by 4 and he gets 160MHz. Of
>course we both use fans and heatsinks for overclocking the CPU.
>I also tried setting the jumpers on my motherboard for 50Mhz and thus
>the CPU goes to 150Mhz (50x3)... But the computer crashes under heavy
>load (It crashes within 10 minutes, and it seems to be due to heavy
>load.)
>I assume the crash is due to running the motherboard at 50Mhz.
>So, is there a way for me to get my motherboard to multiply by 4???
>Or is there another solution that I'm missing????
>Thanks everyone!! I really appreciate any and all help!!
If you got it to overclock for 10 minutes then it is most likely a
cooling problem. You will be much more pleased with the performance if
you could keep it running while overclocked, especially with a 50 mhz
bus as opposed to the 40 mhz bus. I would recommend keeping it
overclocked and running a large heatsink with thermal compound.
Peltier cpu coolers are also available and work nicely.
-Dan Beacom
Pan...@chatlink.com
I>You know, I believe I am having the exact same problem. I just upgraded
>to an Am DX5-133 (3.45V) (My 486-VLB motherboard has a jumper for 3 or 5
>volt operation) and my motherboard will only multiply by 3 instead of 4.
>(I believe I have different BIOS though)
>
>Thus the best I can do is run at 120Mhz (40x3) My brother has this
>exact chip, but his motherboard multiplies by 4 and he gets 160MHz. Of
>course we both use fans and heatsinks for overclocking the CPU.
>
Multiply by 2, the AMD 586 at least will change that to 4.
Dan Beacom
Rick Willardson <wil...@kentrox.com> wrote:
>Hello Ted and All,
>You know, I believe I am having the exact same problem. I just upgraded
>to an Am DX5-133 (3.45V) (My 486-VLB motherboard has a jumper for 3 or 5
>volt operation) and my motherboard will only multiply by 3 instead of 4.
>(I believe I have different BIOS though)
>Thus the best I can do is run at 120Mhz (40x3) My brother has this
>exact chip, but his motherboard multiplies by 4 and he gets 160MHz. Of
>course we both use fans and heatsinks for overclocking the CPU.
>I also tried setting the jumpers on my motherboard for 50Mhz and thus
>the CPU goes to 150Mhz (50x3)... But the computer crashes under heavy
>load (It crashes within 10 minutes, and it seems to be due to heavy
>load.)
>I assume the crash is due to running the motherboard at 50Mhz.
>So, is there a way for me to get my motherboard to multiply by 4???
>Or is there another solution that I'm missing????
>Thanks everyone!! I really appreciate any and all help!!
If you got it to overclock for 10 minutes then it is most likely a
cooling problem. You will be much more pleased with the performance if
you could keep it running while overclocked, especially with a 50 mhz
bus as opposed to the 40 mhz bus. I would recommend keeping it
overclocked and running a large heatsink with thermal compound.
Peltier cpu coolers are also available and work nicely.
-Dan Beacom
Please allow me to correct my earlier response before I get flamed.
The bus speed for the 133 should optimally run at 66 mhz. In your
case, running it at a tripled 50 mhz will only allow for a 50 mhz bus
and most likely less performance at 150 mhz on a 50 mhz bus than 133
mhz on a 66 mhz bus.
-Dan Beacom