VOGONS

Pentium III in Intel LX board?

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First post, by Predator99

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I have played with my Gigabyte GA-686 DLX (Intel 82443LX) board from this thread...

Re: What retro activity did you get up to today?

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...and tried some Pentium IIIs in it to get a higher speed. They are all detected, but the BIOS stops before the CPU-ID is displayed.

With P2:

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With P3:

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As I already have the most up to date BIOS revision I assume there is not much I can do to get this running?

But: I have read that the LX chipset doesnt support a P3 at all. But the BIOS detects the CPU correctly.

So what can be the reason it doesnt boot?

Reply 1 of 8, by xjas

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I'm running a P3/550 on an Asus P2L97-S, it seems to work fine. (Of course it doesn't support 100MHz FSB so I'm running it at 5.5x75=412.) It was a bit finicky getting it to go (may have just been crusty contacts or something), but after a few tries I got it working & I've been running it ever since. Make sure the CPU runs at a voltage your board can supply.

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Reply 2 of 8, by okenido

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Check if some modded bios for your mobo exists

Can you enter setup with the PIII ? Have you checked for an option like "Halt on..." and set it to "No errors" ?

Reply 3 of 8, by Predator99

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Therefore it should work in theory?

Honestly, I am not 100% sure if the CPUs I tested are 100% OK or compatible. They are without plastic case and seem to be some OEM equipment. Maybe this is a cause...

No, I cannot do anything when a P3 is inserted. I also dont think another BIOS is available.

Reply 4 of 8, by Tetrium

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Just to be sure, which Pentium 3s are you testing with?
LX may support Katmais, though this is more a matter of the board and not just the chipset.

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Reply 5 of 8, by Predator99

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I have tried these (and identical ones):

The top one boots at 500 MHz ("PB 746509-001").

The bottom one at 300 MHz ("PB 720885-001").

Tried with a cooler installed of course. Should be Katmai, but difficult to find further data.

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Reply 6 of 8, by The Serpent Rider

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So it actually can boot with Coppermine. Interesting.

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Reply 7 of 8, by nforce4max

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Try to find some way or crippling the fsb to 66 through 83mhz then maybe it will work.

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Reply 8 of 8, by Kamerat

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The Serpent Rider wrote:

So it actually can boot with Coppermine. Interesting.

I can boot a PIII "Korean Tualatin" 1,4GHz on my Abit LX6 using a MSI MS-6905 Sloket, the board runs the CPU at 1,5V configured by the adapter.

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