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PIII Voltages?

A

Auric

Diamond Member
Can someone direct me to a table of PIII voltages for the various parts?

I am considering replacing a C533A when the prices come down s'more and generally will not use more than the power supply fan for active cooling. This chip is running at 1.6V / 825 MHz. Would a P850 be significantly better for gaming in combination with a Radeon DDR or is something peppier called for?
 
Intel Pentium III spec sheet

I don't know if you'd be able to get away with running the chip fanless though. Unless you buy a 133 FSB chip and run it at 100 FSB with the voltage lowered I really dont see it happening to easily. But who knows, the large alpha PEP66 or a comparable heatsink just might be able to suck up the heat.

matthew
 
Hey thanks. I see the current P850's are designed for 1.65 and 1.7V. Oddly, the later model specs require more voltage. What up wid dat? Were the engineers overly optimistic at first?

I have run the current CPU at 1.65 so I suppose it should not generate any more heat. I see the latest 1.113GHz only needs 1.45V but comes in FC-PGA2 -is that incompatible with FC-PGA?
 
What happens is this, ideally Intel would like to produce many as many processors as they can at as low a voltage as they can so they say "hey we've got a bunch of P3s that can run at 850mhz/1.65v lets sell those next" the company agrees and the Intel Pentium III 850 @ 1.65v is released. Three months later the chips are selling like hotcakes, Intel can't keep up with the demand. They start making more P3 850s (not that they ever stopped) tweaking them along the way, however this time the yeilds aren't so high as Intel is having some quirks with their silicon and the tweaks they are applying. The current batch of chips will no longer run at 1.65 so they increase the core voltage to 1.70v and "voila" the chip yeild increases and production is high again. Everyone's happy right? Well what Intel just did in a sense is overclock the chips. They raised the core voltage themselves as so many of us do to increase the clock speed of the cpus.

As to your question regarding the new P3 Tualatin @ 1133mhz I believe it really depends upon the motherboard for support. Any previously released motherboard would need a BIOS flash at the least to be compatible

matthew
 
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