2008 upgrade path

[ZennZero]

I never did locate two different logic board P/N's being available as replacement parts, but I may not have found it, or the places I checked were out of stock, and removed the item from the site.

Both versions of logicboard are available here:

http://www.dvwarehouse.com

The 3.2GHz board p/n: 661-4676
The 2.8/3.0GHz board is p/n: 661-4449

There are a number of other vendors selling them as well.

I actually acquired a copy of the service manual, and while I haven't looked through it in depth, I did see something about the 3.2GHz logicboards having different "coatings" on their heat-exchanging components... Since this article confirmed that voltage and EFI aren't issues, I suspect that all changes are cooling-related.

 

[gugucom]

Both versions of logicboard are available here:

http://www.dvwarehouse.com

The 3.2GHz board p/n: 661-4676
The 2.8/3.0GHz board is p/n: 661-4449

There are a number of other vendors selling them as well.

I actually acquired a copy of the service manual, and while I haven't looked through it in depth, I did see something about the 3.2GHz logicboards having different "coatings" on their heat-exchanging components... Since this article confirmed that voltage and EFI aren't issues, I suspect that all changes are cooling-related.

The key thing here is the desciption. One board is for 3,2 GHz only, the other is for both 3,2 and 2,8 GHz. So there is no problem to upgrade, only to downgrade. It sure looks very strange but who knows.

 

[nanofrog]

Both versions of logicboard are available here:

http://www.dvwarehouse.com

The 3.2GHz board p/n: 661-4676
The 2.8/3.0GHz board is p/n: 661-4449

There are a number of other vendors selling them as well.

I tried there and macpalace.com using the P/N's posted previously. Nothing showed up.

I actually acquired a copy of the service manual, and while I haven't looked through it in depth, I did see something about the 3.2GHz logicboards having different "coatings" on their heat-exchanging components... Since this article confirmed that voltage and EFI aren't issues, I suspect that all changes are cooling-related.

I hadn't gone back and looked at the .pdf I have of it. Too much effort.

But for 80W to 150W, they could have changed the VR parts (cheaper VRs on the 80W) or added cooling for the 150W boards (heatsinks and TIM to cool them - maybe that's what their terminology means ). Which would be sufficient, so long as the parts used could actually sustain the load. Otherwise I think of a spray on finish of some sort (aka conformal coating), which isn't capable of dealing with that much of a thermal difference. TIM, no matter what it is in makeup, isn't the most efficient thermal conductor (it's still a suspension), but it is better than bare metal to the part surface. It still needs to be used with a cooler of some kind.