Single CPU Chip in Mac Pro 1.1

[silentsage]

I have a Mac Pro 1,1 (2006 model). Does anyone know if it is possible to run his machine using a single CPU chip instead of a two? The new LGA 771 quad core chips (e.g., 5420) have more performance in a single chip that the dual 5150s in this machine. It's pretty expensive to buy two 5450s to maintain the dual-CPU chip configuration, but a single chip upgrade would make sense.

Most non-Apple dual processor motherboards will run with only a single CPU. I'm curious is anyone has tried this with a Mac Pro.

Thanks.

 

[r.j.s]

I think it may run with one CPU, but I don't know if that CPU will fit in the socket ...

 

[Eidorian]

I remember talk of this ages ago and yes you can run it on a single LGA771 processor.

I can't confirm my memory of this though.

 

[bozz2006]

the only chips that are compatible with the mac pro classic are 51XX and 53XX. Woodcrest and Clovertown, I think.

 

[Eidorian]

the only chips that are compatible with the mac pro classic are 51XX and 53XX. Woodcrest and Clovertown, I think.

This is correct. You can't use 45 nm Penryn derived Xeons in the Mac Pro 2006.