News AMD's RX 7900 XTX Reference Cooler Can Measure Ambient Intake Temps

[Admin]

This new measurement tool, could save cards from overheating capacitors in 0db mode

AMD's RX 7900 XTX Reference Cooler Can Measure Ambient Intake Temps : Read more

 

[InvalidError]

An inlet temperature sensor doesn't exactly tell the board much about board components overheating. If you want to know that board components are overheating, you put your temperature sensor on the PCB near those components. With so many VRM designs using integrated smart power stages, you can get the individual power stages' internal temperature by reading their temperature output pin.

 

[-Fran-]

If my thermodynamics memories are not that bad, it could be to calculate the temp delta for the optimal fan pressure needed so you use the optimal fan rotation speed (RPM) for the optimal temp of the air flow in order to move the hotness out. This would give way way finer grained control over fan speed and noise.

...Or something along those lines.

Regards.

 

[InvalidError]

If my thermodynamics memories are not that bad, it could be to calculate the temp delta for the optimal fan pressure needed so you use the optimal fan rotation speed (RPM) for the optimal temp of the air flow in order to move the hotness out. This would give way way finer grained control over fan speed and noise.

You don't need an ambient temperature sensor for that: the VRM tells you the board power being pumped into the HSF, the HSF engineers should have characterized the HSF's thermal resistance as a function of fan speed, so you can already derive ambient temperature from characterized junction-heatsink-air thermal resistance as a function of fan speed, junction temperature and board power.

I suppose stuffing a sensor in there is the lazy work-around for not characterizing the HSF beyond making sure it can cope with max load under worst-case supported conditions.

 

[-Fran-]

You don't need an ambient temperature sensor for that: the VRM tells you the board power being pumped into the HSF, the HSF engineers should have characterized the HSF's thermal resistance as a function of fan speed, so you can already derive ambient temperature from characterized junction-heatsink-air thermal resistance as a function of fan speed, junction temperature and board power.

I suppose stuffing a sensor in there is the lazy work-around for not characterizing the HSF beyond making sure it can cope with max load under worst-case supported conditions.

No, it just adds more information for an overkill solution to ensure the optimal fan speeds in all thermal conditions.

I guess that's the best way to characterize that external sensor: overkill XD

Regards.

 

[helper800]

No, it just adds more information for an overkill solution to ensure the optimal fan speeds in all thermal conditions.

I guess that's the best way to characterize that external sensor: overkill XD

Regards.

Its also an very useful way to sanity check what's actually going on with the fluid dynamics of your case and fan setups.

 

[DavidLejdar]

It would sure seem nice if there would be end-user access to that sensor. One use for it could perhaps be even to link it to PWM chassis intake fan/s at the bottom of the inner chassis (when one has that option).

Not that I may necessarily need it, having thermal sensor on MB, according to which there isn't any heat building up, with so far sufficient air flow. But at least getting the read-out would sure seem nice.

 

[Alvar "Miles" Udell]

It seems to me that this would be a feature much more suited to enterprise level cards with multiple to a case rather than consumer level with...one. Perhaps they're testing and refining the feature on these Radeon cards so they are implemented correctly on FirePro.

 

[InvalidError]

It seems to me that this would be a feature much more suited to enterprise level cards with multiple to a case rather than consumer level with...one. Perhaps they're testing and refining the feature on these Radeon cards so they are implemented correctly on FirePro.

In an enterprise server rack, you'd want a fan-less heatsink with a front-to-back straight-through flow relying on the server's double row of "blowiematrons" to keep everything cool. Putting fans on CPUs and GPUs in those would only lead to their premature failure from over-speeding from the amount of airflow being forced through by the blowies.