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FIC PA-2000 and Cyrix P150+

Hi,

I want to try a Cyrix 6x86L P150+ CPU on a FIC PA-2000 Motherboard. The docs say it's not tested, but somewhat equivalent CPU's run fine on the Board.

On the CPU can be read: 120 MHz and 2.8v

Is this a voltage the motherboard must support? The MB manual lists a Jumper only for the settings 3.3 or 3.5 volt.
I.o.w. Kan I use this CPU with one of these voltages?

Does anyone know the internal clockrate of this CPU (50, 60, or 66)?

The CPU says: 120 MHz.
The manual only gives jumpersettings for the following combinations(in MHz):
50/100
66/133
50/75
60/90
66/100

Which (if any) is suitable for the above Cyrix?

Thanx in advance.
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ehout
Asked:
ehout
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1 Solution
 
TedSennCommented:
I don't really know but I think the 50/100 would work for speed. The MB should be at 2.8V (if you are brave try at the 3.3 setting). If you use 3.3 you may "fry" (technical term for flame enable) the processor/MB.
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1cellCommented:
this is not a 100MHz processor and will not work at 50/100.
also, the voltage needs to be very close if not exactly what the processor wants.  I would say the answer here is two part.

First, this will not work with the Cyrix chip
Second, get a better processor than  a Cyrix.  If this is socket7, AMD 450's are far less than $100 and will perform about 100 times better than that old Cyrix.
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larrypaloozaCommented:
Looks like the MoBo only supports up to 133 and is restricted probably to CPUs B4 AMD became popular. Get a new MpBo and Processor, or fry that CPU at 66/133 , 3.3V.  What the hell, why not try, the CPU is junk anyway.
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MrbreezeCommented:
If the processor is a Cyrix 6x86L P150+ CPU it is made to run on a bus of 60 and multilied 2x. It is a "performance" rating not a true speed rating. It runs on a core of 3.3 volts.
From the list you gave
(in MHz):
50/100
66/133
50/75
60/90
66/100

Which (if any) is suitable for the above Cyrix?
The board doesn't support it so you can only choose to run it at a 50 or 60 bus and it will only multiply 1 1/2 times thus it will run either 75 or 90 mhz.

The board you got isn't for the chip you got
                    Mrbreeze

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MrbreezeCommented:
So it is a strange chip. The Cyrix 6x86L P150+ is a 3.3 volt chip with internal clock of 60, multiplied 2x for 120mhz. The chip you got says 120mhz 2.8 volt. The board won't multiply 2x on the 60 bus so you can't get 120mhz anyway. So whats the use. Run it and watch the smoke
                     Mrbreeze
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1cellCommented:
hehe

I wondered if that would be rethunk
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MrbreezeCommented:
consider it rethunk
                    Mrbreeze
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ehoutAuthor Commented:
Thanx all for the info.
As stated above, the CPU is just for testing purposes. At this very moment, a Intel P75 resides on the Motherbord, but I suspect the *&(*&^& thing to be faulty.
So I needed another CPU for testing, and The cyrix I got for free from a collegue. So I don't mind running on a lower speed. Everything is fine when I can run the cpu without frying it or my board.

<---copy from mbreeze--->
So it is a strange chip. The Cyrix 6x86L P150+ is a 3.3 volt chip with internal clock of 60, multiplied 2x for 120mhz. The chip you got says 120mhz 2.8 volt. The board won't multiply 2x on the 60 bus so you can't get 120mhz anyway. So whats the use. Run it and watch the smoke
<---end copy--->

Well, the exact print on the cpu says:
Cyrix 6x86L P150+
120MHz
2.8V
..
So maybe it is a strange chip, but now what to do (without watching the smoke?)

BTW, the board manual says it supports Cyrix M1, any idea what kind of chip that is?

Grtx, Eric
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MrbreezeCommented:
That is what you got. The P150 is a MI. It has no mmx or 3Dnow. I think if you put it on your board and it will run, but how long is just one of those things.

Just set the bus at 60 and the multiplier play with. First try 2x, if it won't run 1 1/2
I aplogize for being funny about watching the smoke, its not going to catch fire all that is going to happen is that the chip will fail, never to work again or it will run and you got the tester that you need.
                   Mrbreeze
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ehoutAuthor Commented:
Hmmm to be sure I guess I'd better start with the latter option. After all, it's just testing.

Thnx, Grtx, Eric
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MrbreezeCommented:
Ehout,
Good luck and come back if we can help you again.
                          Mrbreeze
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ehoutAuthor Commented:
Hi,
I'm back.
Anyone interested in a fried CPU?
I followed the mainboard's manual instructions, started the PC and saw the thing running on 180 MHz? I didn't even know it was possible with that board.

Well what the heck. I'm looking around for a supported CPU.

Does anyone know of a utility which (under dos) checks the IO controller for errors? Just to be sure.

Grtx, Eric
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1cellCommented:
woops, you actually overcloacked a Cryix.  If it lasted a minute you did well.

Bottom line though, is really simple.  The board didn't support the lower voltage setting for the chip and failure was expected.
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ehoutAuthor Commented:
Well for the minute it ran pretty fast.
:-)

Grtx, Eric
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