Tom's Hardware > Forum > Motherboards & Memory > General Motherboard > HELP on P166MMX to Intel430VX

HELP on P166MMX to Intel430VX

Forum Motherboards & Memory : General Motherboard - HELP on P166MMX to Intel430VX

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Anonymous   04-04-2001 at 02:12:39 PM

my current system set-up is

P100 (o/c P133)
no L2 cache
40MB EDO (2x8MB and 2x16MB EDO)
1.2GB HD and 2.1GB HD
48x ASUS CDROM drive


i just got a P166MMX from a friend and 2x16MB EDO memory.

can i install it in my Intel430VX chipset provided that I will not FRY THE CHIP because the STD voltage is 3.3v in the chipset?

i'm confused coz the I/O voltage of P100 and P166MMX is 3.3v but the latter also has a setting for the CORE = 2.8v! is there a way i could adjust to that suitable setting in mobo (jumpers) or itz okay for me to install the P166MMX chip without without adjusting anything?

Pls. response....i really need your advice on this.... :(

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Anonymous   04-04-2001 at 02:23:16 PM
- 0 +

All P55C (MMX) CPUs require Dual Voltage 3.3V & another voltage that depends on the CPU Core (the 2.8V u have talken about) Show at your mobo revision and try to find out if it supports Dual Voltage. Don`t plug in the CPU without knowing it because it would destroy it.

Reply to Anonymous
Anonymous   04-04-2001 at 02:30:44 PM
- 0 +

VRE is different from the dual voltage (Split voltage?) you're talking about right?

Reply to Anonymous
NickM   04-05-2001 at 01:40:02 AM
- 0 +

coolsurf,you can see the VRE by their radiators, read the voltage marks on the board (sometimes under the processor). But don't trust those reading much and try to find the exact model of the motherboard and check the site. Sometimes
the BIOS ID string helps (you can find the help sites by trying Search on `BIOS' and `motherboard').
There's very small probability, that your motherboard based on Intel430VX chipset and equipped with P100 processor, supports Pentium MMX (or something higher than 200 MHz w/o MMX).

Reply to NickM
Anonymous   04-05-2001 at 02:54:21 PM
- 0 +

NickM and everybody,

the code on the processor is SY016.
Now I'm not sure if itz MMX because there were no label MMX* on the processor over or under the chip. Do you think it is just a plain pentium processor?

besides, i can overclock it to P200 instead right?
as i did with my P100 to P133*66Mhz

i use a thermal paste too. :)

Reply to Anonymous
Crashman   04-06-2001 at 01:05:40 AM
- 0 +

You need to tell us more about your motherboard, at least give us the bios string at the bottom of the screen, and yes, you will probably fry your new processor if you don't change anything. And you probably can't overclock, there is a good chance that it is multiplier locked (Intel did this late on in there production).

Suicide is painless...........

Reply to Crashman
BGates2B   04-06-2001 at 04:47:21 PM
- 0 +

I understood that the VX chipset supports the dual voltage for the MMX chip. Look at the board and see if they give you jumper settings for the voltage. Drop the voltage down to 2.8V. Also, the VX supports SDRAM. You'd be better of picking up a 64 MB PC100 stick for $20.

Oh, and most (not all) MMX chips are black with silver dots and a silver chip cap in the center. The non-MMX 166 were the traditional Intel grey ceramic.

Reply to BGates2B
r2k   04-06-2001 at 06:44:48 PM
- 0 +

Don't count on overclocking too much.The CPU's very probably multiplier locked and won't go to 3*66.6=200.
BUT if your mobo supported it you can try 2.5*75=187.5
and mind you I THINK that's gonna be faster than a plain 200 MHz because of a faster bus speed.

Reply to r2k
Crashman   04-07-2001 at 01:27:50 AM
- 0 +

Of the 100 or so VX motherboards I've had, only about 1 in 4 have had adjustable voltage. The 0thers either had jumpers in a resistor card slot, or the resistor card slot blanked out and solder across the points. 1 had a resistor card in place. The 1 in 4 that were adjustable had onboard resistors of course. It was really up to the manufacturer to install resistors on the motherboard.
As for dual voltage processors, ALL ceramic grid Pentiums are single voltage, ALL plastic grid processors are dual voltage, and I have three dual voltage NON MMX processors right now, so although they were rare they still existed. The platic grid variety has the pins extended to the top of the grid (little silver dots on the top).

Suicide is painless...........

Reply to Crashman
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