Which pins are altered on Tualatin vs Cumine, and how important?

[Eug]

BX + Tualatin = nada 🙁 or so everyone says. What is the current info on this? I remember seeing reports saying the Celerymine (but not PIII Cumine) wouldn't work on an old PPGA board, but then low and behold, it did as long as the BIOS supported it. And there remain unconfirmed rumours of Tualatin working on BX boards that have VRMs which support the 1.5 V spec.

My mobo does support 1.5 V and it's BX, and I'm still hoping...

P.S. I wasn't sure if this was best for this forum or not. Feel free to move it if it isn't technical enough for the Highly Technical Forum.

 

[Mapidus]

I don't know too much about this, but it is not just a pin change. It has something to do with the chip having 2 voltage planes or something like that (but I might be confusing this with the situation with the CB0 and CC0 celerons). Anyways, from the current news I have seen, the Tualatins will not work with any of the older chipsets (at least without a converter) because of this. Right now it seems like only the newer 815EB based motherboards have Tualatin support, not even the older 815s. There might still be hope though with the Coppermine-Ts. These supposedly are the same as older Coppermine, but on the newer .13um process. Hopefully it does not have the changes that were introduced with Tualatin that requires the 815EB chipset.

Of course we probably will not no until several months after they release these chips as to what the options are to getting them to work on a BX, if any.

People in CPUs or GH might know more about this.

 

[Frosty20]

The Tualatins 2 voltage planes are:
Core:1.45V
AGTL+ FSB:1.2V
The core Voltage is controlled by the VRM's and the FSB Voltage is controlled by the chipset. I think the Coppermine's FSB voltage was 1.5V.