![]() Push/Pull is to overcome flow resistance, in the case, not to increase unrestricted flow. I would install fans in sets of push/pull (one fan pulling air into the case, one fan pushing air out of the case).Each, Noctua 140mm NF-A14 PWM rpm, moves air at 140 m3/h or approx.Case fans: Let's assume we use Noctua case fans. Now we have a starting point and can do a rough specification on the case. ![]() Note: due to restrictions in the flow etc. 180 cfm of fresh air to "feed" this ideal GPU. So with 3 fans, I would need 177 or approx. So I will "wave hand" and assume each of the 3 GPU fans can push 100 m3/h or 59 cfm. 72 CFM Lets assume the FTW is using comparable technology, the blade area will be less since the fan is smaller. You want to get rid of the air, you just heated, with the GPU just as fast as you heated it up! So how would I create a simple rule of thumb for case airflow? (Note: I could get way more complex, but that would really mess up the "rule of thumb".) So let's take an educated guess and make a simplified example of the method assuming 100% fans speeds on the GPU My assumptions about the FTW3 Ultra: A high end noctua NF-F12 120mm industrial fan turning rpm moves air at 122 m3/hr or approx. Basically you want to replace the total amount of air in the case with AT LEAST the "ideal" airflow required through the GPU as stipulated above. fans at 50% = Z cfmWith this data, can calculate a estimated minimum airflow required through the case.fans at 100% = X cfm (cubic feet per minute).1) If we knew the "ideal" airflow through the GPU at a couple of points, say: This means there is useful data that would help in designing case builds and diagnosing overheating problems. At the air velocities generated in a computer case and through a GPU card, the air flow is incompressible. My background is mechanical (aeronautical) engineering so thermodynamics / aerodynamics was part of my training. I would ask that EVGA provide some design data on the air flow rate required by the FTW3 cards to ensure adequate cooling. It turned out that the problem was mitigated by adding some fans to the case. There was a lot of speculation regarding the root cause. I read with great interest a discussion regarding high temperatures on a FTW 3080.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |