Black MacBook 2.1 heat

[amagichnich]

Hey Folks,
I know it's a bit retro but this is a thread about a MacBook in the MacBook forum - if It's the wrong forum feel free to move it.
I recently acquired a BlackBook 1.83 C2D. Now I can't find this model anywhere, only the white one and the higher clocked black ones. I assume the previous owner combined a black and white model...
On the outside it's in nearly perfect condition, a few scratches only, no typical breaks in the front.
But inside this baby is quite a mess - many screws missing, the temp sensors missing and nearly no heat paste.
After applying new heat paste I locked the fan to 3333rpm and the max temp so far was 81°C - vs 88°C on max rpm before (CPU diode). Now the question is how accurate these temps can be with the two sensors missing?
Are there any tweaks to reduce heat further? I thought about undervolting but the software isn't free (CoolBookController USD10).
Any recommendations?

PS: I'm usually to be seen in the PowerPC forum, I therefore know some things about older macs and know how to handle them. Also I don't use this as my main computer but as a funny hobby. Comments like 'get a new MacBook' can therefore be spared! Sorry about my english, i'm german

 

[Intell]

That particular Macbook is a combination of two different ones. The CPU diode can reach up to 188F in that model. The CPU diode is an accurate reading and can be used to determine fan speeds. There isn't much else you can do to cool them down other than not run it on a insulating surface like a blanket or your lap.

 

[amagichnich]

That particular Macbook is a combination of two different ones. The CPU diode can reach up to 188F in that model. The CPU diode is an accurate reading and can be used to determine fan speeds. There isn't much else you can do to cool them down other than not run it on a insulating surface like a blanket or your lap.

I knew there is something wrong!!
The diode is integrated in the cpu or somethign like that? Then what are the two temp cables there for?
As the screws are a bit frayed I think I'll replace them soon - is there any site I can get them bundled or is that yet to be invented?
I use it on a solid wood desk (2.3cm thick) and the heat comes through the wood - even my hot blooded PB never reaches more than 64°C. 188/86 isn't that much and it can take up to nearly 100°C I think but it's not that convenient and now I'm asking if the switch to Intel really happend due to heat issues...
Thanks anyway!

 

[Intell]

The CPU diode is a part of the CPU die. There are many temperature sensors within a Macbook. Without knowing exactly which ones are missing I'm not able to tell you what they did besides offer the system more information about itself.

 

[amagichnich]

These two are missing (picture link from ifixit)

 

[Intell]

Those are the heatsink sensors. Not that bad to have them missing, but the system won't be as happy.

 

[ApolloBoy]

The pre-unibody MacBooks are notorious for running extremely hot, my old 2007 model used to get nuclear hot too. Redoing the thermal paste helps a bit but not by a whole lot.

 

[amagichnich]

Those are the heatsink sensors. Not that bad to have them missing, but the system won't be as happy.

To get that straight: Sensors missing is not that bad, as the cooling depends on the CPU diode which is integrated in the DIE of the CPU, right? That relieves me of the pain of searching the web for those sensors

The pre-unibody MacBooks are notorious for running extremely hot, my old 2007 model used to get nuclear hot too. Redoing the thermal paste helps a bit but not by a whole lot.

After redoing the thermal paste the temps are quite good. Av 147F with 3 Tabs in Firefox 45, Word 2011 24 Pages, Spotify and Mail in Snow Leopard with fan locked to 3333rpm. That's not that bad, isn't it?
Sure the white glossy fingerprintophil unibody thing behaves better in terms of heat and...wait... everything, but I prefer the BlackBook because of it's blackness

 

[Intell]

It uses more than one sensor for cooling. Those sensors may not be critical, but it isn't good that they're missing.

 

[amagichnich]

It uses more than one sensor for cooling. Those sensors may not be critical, but it isn't good that they're missing.

Thanx for the info Intell

Is there anything like G4fancontrol for Intel macs? I found 'SMCfancontrol' which i really dislike and 'Macs Fan Control'. The latter is good for locking the rpms but is lacking the feature of a 'fire everything you have, fan' at a certain temp. Unfortunately the fan controller isn't the same like in the PPCs