My entire system runs extremely cool with this setup not matter how hard I drive it.
I can say that my Porsche is very fast ... but until it goes head to head with another vehicle, no reliable comparisons can be drawn. As your statement provides no reference or comparison to an alternate scenario, any conclusions drawn will remain mere supposition.
Your reply to USAF is assuming the PSU will exhaust into the case (it doesn't), .
What assumption ?
1. Math is not subject to interpretation. When you have 2.5 times more air blowing out then in, that air must get in somewhere. This can not be disputed and therefore is not an assumption
2. That air coming in will take the path of least resistance. This can not be disputed and therefore is not an assumption
3. In 99% of the cases, the largest, least restrictive openings are the rear case grilles and vented slot grilles which have the largest openings and thereby offer the least restriction to air flow. Few will attempt to argue this and doing so requires one to ignore basic facts
4. On what basis can you attest that exhaust air doesn't come into the case.... all this heat is being exhausted to the rear of the case. We know that the air intake, as has been established above will be the major source of intake air. Please explain how this intake will not contain exhaust air or point out these alternate openings that are will let air in. Try this ... go to a gas stove and turn on a burner ... place a desk fan on the adjoining burner back side to the lit burner. Hold a thermometer in front of the fan and measure the temperature with thermometer .. now turn on the fan ... and watch the reading rise.
5. How do you explain the fog testing which shows that when the fog is directed at the bottom / rear of the case with top fans as exhaust, the entire case is immediately filed with fog ? Reverse the fans and the fog is blown AWAY from the grille openings.
6. How do you explain the temp readings ? Why does interior case temps drop ? Why does coolant temperature drop ?
and you are always using a GPU with a cooler that exhausts in the case (not all do)
7. All GPUs, no exceptions, put heat into the case... unless you can find one that ignore the laws of thermodynamics. In a radiator, only 60% of the heat is exhausted thru the radiator. The rest is radiated out into the case from the rad shroud, tubing, backplates and other component surfaces. In a blower style cooler, not all the air is exhausted out if the case.
Much of it is radiated of the backplate or PCB. Some of it blows out into the case thru shroud openings... Put your fingers on your backplate or PCB and tell me it's cool to the touch ... if it isn't, then a portion of the heat is being radiated into the case. While your at it, explain how a 250 - 350 watt GFX card can be cooled by a CLC type cooler if all 350 watts are being exhausted thru the single 120mm radiator. Why possible reason could there by then for CPU coolers for 90 watt CPUs use 2 x 120mm if a single 120mm rad can handle 3650 watts ?
All GFX cards exhaust air outside the back of the case thru the vent openings. Blower style coolers exhaust more air out the rear but because they can't get enough air out via that opening, they will throttle unless power output is so low that little cooling is needed.
But lets assume the GPU does, then dumping additional hot air over it through the radiator is a good idea? No.
8. Thank you for proving my point. Using the rad fans as exhaust you are doing exactly that ... hot air coming off the GPU is getting out how ? It's going up thru the radiator after being preheated by radiated surfaces and escess blowby from the GPU. So you are cooling your 90 watt with air preheated by 1 or 2 GFX card worth of heat, a portion of which went out thru the card grille ... only to come right back in .... and the rest went out thru the radiator whose job was to cool the CPU.
9. With the intake fans on radiator, no GPU heat is getting anywhere near the radiator... It's all being forced out thru the rear grille ... the air enters the GPU thru the bottom of the card. Please explain how the air coming thru the rad from the top is going to go down all the way to the bottom of the case, get under the GPUs and than make a U turn and go back up thru the card. It doesn't happen, the fog just doesn't move that way.
10. What we clearly see with the fog machine is that air from bottom, side and front intake fans goes up thru the GPU(s) and out thru the rear case grilles never getting near the top rad....What we clearly see with the fog machine is that air from top, front and side intake fans goes down thru the radiator and out thru the rear case grilles, never getting anywhere near the GPUs. The air streams coming from the top and bottom meet in the middle and have only one way to get out of the case and that's thru the rear.
If you are willing to undertake the time and effort to perform comparative tests and to measure / record data for each scenario using appropriate equipment and test procedures, I would be very interested in seeing the results. More data always adds to understanding. But without that, I have seen nothing that contradicts the exhaustive testing that has already been performed. I don't doubt that a scenario can be created in which these suppositions might be true but none of the variations tested here support any alternative conclusions.
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