PIII chip on LX board?

[Monolith]

I have a PII 233 on a Abit LX board. I want to know if I can put a P3 chip on it. I don't care if I can't clock it to full speed. I know mine supports up to a PII 400. Can I run a PIII 450 as a PII 400?
Any suggestions?

 

[DarkManX]

check for bios upgrade.

 

[Ulysses]

You may be able to.

To be sure, you should first identify your board correctly and then go to the Abit website and find the page devoted to your board. That will tell you what CPU's it was originally designed for. You should also check for BIOS upgrades - their descriptions should tell if the upgrade made the board able to accept additional CPU's later. But usually those won't be of a different type, but just faster versions of the same type.

 

[LXi]

I dont think its possible. I think LX has the capability of supporting P3, but I dont think any of the LX boards can support the P3 voltages, because they were designed to run with P2s, which has different core voltage than P3.

 

[Viper GTS]

Umm...

It might work, but the LX platform only officially supports up to a 66 MHz FSB. The BX was the advent of the 100 MHz FSB.

Dunno if it has a 100 MHz option, though, so I'll shut up now...

Viper GTS

 

[odog]

P3..... no...

and P2 400.... no

your board doesn't support 100mhz FSB... ie it won't support any P2/P3 higher then 333

one good thing.... you should be able to run celerons up to 533.... and maybe even a C2...

 

[odog]

LXi.. actually if his boards supports the P2 333(which it does) then he would have no voltage problems. this all stems from the fact that the P2 333 was the first deshultes core based chip(ie .25 micron). everything from the P2 333 and up(including some 300's and 266's) runs @2.0 volts which is the same as what all katmai P3's do.. you might be thinking of the older klamath based P2's, which ran @2.8 volts, which stopped at 300(again even some 300's aren't klamath... SL2W8 anyone?)

 

[LXi]

I remember quite a few LX boards were capable of performing 100MHz.

e-phex: It's pretty hard to find a Katmai(or Deschutes+SSE) these days, the Coppermines have basically taken over, as far as I know no LX board can do 1.5-1.7 voltage.

 

[Tominator]

I've never seen an LX board capable of 100mhz. I'm not saying they so not exist.
I have an LX board that will accept PII and Celerons up to 533mhz. The FSB options are 66 and below, 75 and 83mhz.

If the voltage was the only issue, a decent slotket would take care of that, but I'm REAL sure there are no BIOS upgrades. I don't even know of a motherboard mfg. that even supports LX boards any longer!

I've tried a 366 Celeron on a slotket and adjusted the FSB jumper to get 100mhz FSB. No go! So, if I cannot get 100mhz even using a slotket, I'd guess it wouldn't run a Celeron 2 at all.

In your case, I wouldn't see why you could not run the PIII as long as you did not expect 100mhz FSB. Using an adjustable slotket of course.

But..why?

 

[obeseotron]

No you can't, you can't run a p2 400, or even a 350 either. You can't run above 66Mhz FSB, so p2 333 is the limit for pentiums. Get a celeron 533, that's the fastest your board should support.

 

[Scope]

The shop I frequent found that one of the customers boards had a bios flash that enabled his lx mb to run up to a p2 400. Anything above 400 on 100mhz bus wouldn't work just below. I thought it was screwy until I saw it working.
Scope!

 

[spencer]

I thought the P2 350 and 400 supported 66 and 100mhz front side bus. I remember when the BH6 came out, it had the high and low signal select so you make the processor think it was running at 66mhz front side bus but you were actually running it at 100mhz front side bus.

 

[odog]

<< I remember quite a few LX boards were capable of performing 100MHz. >>



find me one.

 

[MadRat]

If it had 100fsb it was not an LX m/b.

 

[LXi]

My mistake, I remember quite a few LX with 83MHz FSB, not 100MHz.

 

[Monolith]

Thanks for the help guys. I'll just go get me a new MB. Maybe one of them cheap all-in-one boards. It's basically going to be a linux machine running as my development server.

 

[Cosmic_Horror]

the Abit LX motherboard did support FSB higher than 83Mhz, and was meant to support 100Mhz however the pci would be clocked at 50Mhz (as the divider is set to 1/2)..

i know of no one that could get this board running higher than 83Mhz...