FCPGA Celeron on LX board?

[jkersenbr]

Is it possible? Such as with a standard FCPGA > Slot1 adapter as long the slocket has voltage adjustments? Or does it take somthing special like one of the Powerleap (big $) upgrades?

I seem to remember reading somewhere that the 566 will remap one of the multipliers and run on LX boards. But I can't find any info on the Intel site. Is the 566 the only C2 that will? Anyone done it?

Thanks for any info...

 

[AndyHui]

Firstly you will need a slotket that can handle FC-PGA processors. Most of the slotkets available today do handle FC-PGA processors.

Secondly, multipliers are irrelevant on Intel processors since they are all clock locked. Whether or not your motherboard has settings for such high multipliers does not matter as the processor will ignore what is sent and use its own settings.

In any case, it's usually more difficult to get a Celeron II to run on a 440LX motherboard for 2 main reasons: the first is BIOS support and the second is voltage support.

BIOSes for LX boards are unlikely to have stepping and CPUID support. Also, there are very few LX boards (if any) that can supply the lower voltages required by Coppermines. In most cases, they only go down to 2.0 volts or 1.80 volts, higher than the 1.5, 1.65 and 1.70 volts required by current Coppermines.

 

[jkersenbr]

So even if there are voltage jumpers on the slocket for 1.65v, it won't work in the older board? Which setting wins -- the votage of the motherboard or the voltage of the slocket? Help me understand...

 

[AndyHui]

The motherboard is not physically capable of sending 1.65 volts, even if you ask for it through the slotket. The voltage regulator on the motherboard cannot handle such a low voltage.

 

[jkersenbr]

Thanks, I figured that was the case because I've noticed that the Powerleap upgrade slockets for this purpose are independently powered from a powersupply lead. But they are also $50. I can find a different mobo for that.

 

[Wuming]

oh... is that the reason why i cannot run a C400 on my friend's mobo which is running his P2 233? cos the voltage difference? and hey, i tried booting his computer with my C400 in vain. will the higher voltage supplied by his computer kill the C400 cpu?

 

[AndyHui]

Unlikely. Most P2-233 motherboards, either 440FX or 440LX boards, have support for voltages down to 2.0 volts. Probably the Celeron 400 would not boot due to lack of BIOS support.