Whilst implementing my 'Aftercooler' project (tut being released soon) I observed the following which is VERY interesting :-
I always thought that the fans run independently of each other - one is on the CPU side, the other on the GPU side. In the event of the CPU/GPU getting hotter (on load), then the appropriate fan would speed up, thus cooling the CPU/GPU.
However - as this experiement shows, there only seems to be a temperature monitor in the CPU ONLY ! (IMG:
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1. Xbox has been shroud modified and taped for maximum cooling over the heatsinks - see my tutorial in the FAQ.
2. Xbox turned on - both fans on (5.4v) - cooling normally.
3. Leave for 10 minutes or so to get everything normal temperature - no change in fan speeds / voltages.
4. Totally block the CPU heatsink vanes ... (possible as I have a top shroud)
5. Within seconds - the voltages increases rapidly on BOTH fans ...
6. I remove the block - voltage drops back to normal within a few seconds ...
7. Totally block the GPU heatsink vanes .. (possible as I have a top shroud)
8. I'm waiting, I'm waiting .. GPU heatsink is getting hotter and hotter now (by feeling the side) .. I'm still waiting ...
9.Nothing - No voltage increase on EITHER fan... (IMG:
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10. Unblock the GPU heatsink - big rush of hot air from the GPU fan, then back to normal again ...
So - We wonder why the GPU's keep failing ? Err... I think I may have just found the answer !!
Discuss ... :-)
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Topic: Gpu Temperature Not Monitored ... (Read 9 times)