Originally Posted by Shenhua
You are generalizing in the first paragraph and you're using an example of the best case scenario for air cooling to prove it in the last paragraph.
I don't disagree with you but you are somewhat manipulating the image of air cooling.
While a u14s it's gonna trash most CLCs "pound for pound" on a threadripper, it won't happen the same on a 3700x for example.
Neither cooling is better than other, each has its own properties and one is more suitable than the other depending on the CPU and the build. Heatpipe cooling disipate heat faster, so where there is no limitation in heat transference between CPU and cooler they do great. Liquid cooling holds heat but due to their mechanism they will always have a colder coldplate, so if the power consumption is not that high but the heat transference between CPU and cooler is poor, they will do great and/or better than any air cooler.
The CLC that poah is talking about will definitely gets its ass handed by any top air cooler on a 200w+ 7-8years OLD CPU, but it will will eat them for breakfast on a 3600-3700x at 1.35v or higher.
Given the setup of the OP here a CLC won't be better than a air cooler, and if it is, it's gonna be by margin of error at the same noise floor.
First paragraph is not best case at all, it's about giving air coolers fair play. All it is about is supplying air cooler with same or at least similar temp of air as is going through radiators on CLCs. To me that is just being reasonable .. not 'best case' at all, just a fair and 'logical case'.
Personally I have never been overly impressed by NH-U14S. It is just another of many big coolers, definitely not as good as many others in it's class .. even TRUE Spirit 140 Direct is within a couple degrees even on 300w TDP and it has 1300rpm fan to U14S's 1500rpm fan/s. TRUE Spirit 140 Power out-performs it by a good margin with similar airflow. Point here is Thermalright Silver Arrow TR4 with fan at about half speed was able to 'trash' all other air coolers he tested .. and when he used TY-143 at full speed it 'trashed' them by a large margin.In his first set of results were with single TY-143 at 1300-1500rpm (TY-143 is 2500rpm) and results were similar to NH-U14S. He later retested with single and double TY-143 at full speed and it not only beat all other air coolers but was able to cool almost as good as his custom loop. Keep in mind in that testing his Threadripper was maxing out and throttling under all cooling tested. Results were not temps but maximum operating speed of CPU.
I don't remember anything about lapping to improve heat transfer from CPU to cooler bases.
I really regret not copying/saving his testing and results, because now I can't find it anywhere on web. He wiped it all off. Like I said, there are a few discussions about it on forums, but sadly not the details and data.
Here are a few links with a little about what Kyle did and results, wish there was more:
Originally Posted by poah
this is on ryzen 3900x. temps were cooler on both dies with the arctic and quieter particularly at lower fans speeds where a computer is 99% of the time.
What was air temp into coolers at time CPU temps were recorded?
If anyone has or finds any of the test data from HardOCP TR4 testing of air and water coolers Please post it or links to it.
Did find below about that testing:
So Silver Arrow TR4 is 11c cooler at full speed and 53dB, but still 9.5c warmer than your XSPC Raystorm. What is the noise level of XSPC Raystorm system in these tests? Have your ran any test on 2990WX with Liqtech TR4 and if so what is it's temps and noise level?
The four fans at full RPM on that rad are 45.5db at 4 feet.
Given the quality problems shown on the Liqtech coolers, we have rescinded our awards and have not done any further testing. Those reviews are still up however.
That was Oct 11, 2018. Can't find Liqtec CLC review anywhere now.