MP 1,1-5,1 MP 5,1 Northbridge tDiode -v- heatsink temperatures

[avro707]

Recently I took off the Northbridge heatsink and redid the thermal paste on it, and replaced the stock plastic spring clips with new ones:

50pcs PC Heatsink Cooling Fan Spring Rivet Fastener Push Pin Mounting Screw

nan

www.amazon.com.au

The original clips were a loss, couldn't be saved. I did keep the springs from them though.

The CPUs are great for temperatures, they have only about maximum 5ºC (sometimes less) between the CPU tDiode and heatsink temperature and basically stay very cool.

But the Northbridge gets hot - I keep the fans up over 1000rpm, but it still has 67ºC tDiode and 52ºC heatsink - if I don't, the tDiode will go over 70ºC. It's working fine, I just thought I might see a bit less of a temperature difference between the two. Are the clips not holding the heatsink tight enough?

For the thermal grease I've applied it carefully over the entire area that should be covered (not excessive amount, but covering properly) same as I did for the CPUs.

The Mac Pro is the following spec:

2x X5690 6 core 3.46ghz
128GB 1333mhz (8x16GB)
Radeon RX580 8GB
Sonnet M.2 4x4 PCIe 3.0 x16 Card with 2x Samsung 980 Pro 1TB
Samsung 970 Evo 1TB 2.5" SSD (the boot drive)
macOS Big Sur 11.2.3

The reading I've done suggests that these specced up dual processor machines will get a lot warmer so maybe I shouldn't really worry.

 

[startergo]

The reading I've done suggests that these specced up dual processor machines will get a lot warmer so maybe I shouldn't really worry.

It will sit around 70-74 for dual CPU's it is normal for the design of the machine.

 

[tsialex]

Why open one more thread about this subject? It's the exactly type of topic that don't ever change.

 

[paulcons]

I'd swear there used to be a lot more info here... does anyone know the Intel part number on our favorite Northbridge chip? I remember a ways back finding an Intel datasheet on it that listed the max temp (not sure the distinction with a Tcase spec) in the 90º range. Was disputing some guy elsewhere who was saying 100º was just fine and dandy and if it got to 140º one had to worry... so I went looking for the document. No matter how clever I was in google, I could not find anything. I found one possible part number, Intel® E8501, I got a 300 page pdf that went into scary detail but seemed to say nothing about operating temps. Just looking for something to back up what I think I know.