Actual influence of flow rate on system temps

[gabe]

Hi Gabe. Thanks for taking the time to test. I need to clarify something.

1. For the 1st part, when the gpu was added to the cpu, was the gpu under stressed condtion or was it idling?

2. If it was under idle condition, would you happen to have data on stressed gpu delta? Would be great to see delta for the CPU for standalone and with gpu.

Apologies as this is off your thread topic.

Wes

Yes, in the CPU tests, the GPU's are mostly at idle.
Stressed GPU conditions for (1) card, are shown in Test #1 of the Graphics test.

Very informative, thanks for the effort Gabe,

just an input, what about stressing both parameter ( folding or similar software ) ?

I knew this would come up (Folding), and I downloaded Folding for GPU, both in console, and command line, but I was unable to place any significant load onto the GPU's. Maybe I didn't wait long enough, maybe I didn't set the correct parameters, but GPU load remained the 1% or less. I think it might be possible, but I am just not sure how to do it.

If any of the Folding@home folks was willing to guide me on how to place a constant 100% load on the GPU's I'd be more than happy to do another set of tests, with the reservations noted below.

This is really nice Gabe

Greatly simple and concise in presentation and the results are very telling

Would be interesting to see what happens when you load both GPUs and the CPU together, but I think that's a rare use case (basically only happens when you deliberately load both subsystems).

I was also interested to test this, and looked for ways to do it (see above comments re. Folding). But if you think about it, all it would really accomplish is to scale all the results upwards, proportionately with the increased heat load.

This would present an interest in terms of possibly re-evaluating the Max CPU and/or Max GPU overclock, and accordingly re-evaluating the size of the heat exchanger and/or the choice of fans. But within the framework of this particular study, emphasis was placed on the impact of flow rate on components cooling. We wanted to establish what the range of values were in the vast majority of operating conditions at the time of this study.

The results will be useful for folks who are on Adobe CS5 programs like Premier Pro, etc that stresses the CPU and offloads encoding/processing on the GPU. Nonetheless, appreciate the hardwork Gabe.

Wes

Same comment as above. If the overall heat load increases, all the temps will go up, but the relative impact of the flow rate will remain the same.