what is split plane?

[MsNath]

I was over at intels site and was reading their specs on the 933mhz chip.

I have my piii 700e OC to 933 so I thought the data might apply

They stated the chip should be run at 1.70v with an additional note
"Requires a motherboard with split plane for the Vcc" What does this mean?

[JaY_III]

I think that means your I/O voltages can be different than the CPU voltage......
I think that sounds right... if i am wrong i am 100% sure i wil be corrected, either by myself, or the next few persons to read this post

[Phil]

the i/o and core voltage haven't been the same since the pre-mmx pentiums I don't think, I think it's to do with the level2 cache using a differant voltage but i'm not sure I know it's an on chip thing that not all boards support, you should email your board manufacturer to find out if it can support it, I know my 2 year old qdi bx board that doesn't even officially support coppermines does.

[Spode]

you would be correct, to be honest I don't know why the added that! The first chip to use split plane I/o voltage was the K6 I think and the p166-mmx.

[wild_andy_c]

Here goes - FCPGA P3's have always been split plane from cA2 to cC0. Celeron FCPGA's have only become split plane at cC0.

The secondary and higher voltage (the I/O voltage) is used to power large caches and higher speeds (such as those in P3's).

The only major motherboard chipset I can think of that doesn't support split plane is the i810 and i810L. The i810e does support split plane.

It's a scary prospect when you hear it - but nothing to worry about.

BX, 693a, 694x, i815, i820, i840 all support split plane. As for SiS and ALi - who knows and moreover - who cares!

[Spode]

I stand corrected. I'm thinking of dual voltage!