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Thread: Noctua NH U12S SE AM4 or Corsair H115i PRO [2600x/3600x] Reply to Thread
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  Topic Review (Newest First)
06-25-2019 05:16 PM
Owterspace That's exactly it. I ran an H100 with very good 120x38s on my x5690 and it had a hard time after about 4300 1.375v. Todays quad cores sip power compared to that old beast, so they more than likely wont get heatsoaked as quick.. unless their caseflow is not flowing as well as they think. I think people are in love with the clean looks, and the "water cooled" feel. I know I was. My 3770k doesn't get my LGMRT warm in the slightest with the fan running, but my x5690 can. A different kind of heat.. beast heat

I prefer my heatsinks these days, no muss, no fuss, no worrys, and I can still keep my overclock in the summer (for now). Win/win.

Its not as clean as an AIO, or CLC or whatever they are.. but if you buy a nice one, a good one, like in the top 5, then its like art, if you have an appreciation for modern manufacturing techniques done proplerly.

I'm kind of all over the place in this post. Cannabis is legal here now, and I've got some good stuff
06-25-2019 03:36 PM
Martin778 There is barely any coolant in an AIO, my h150i was reaching max coolant temp in about 5-10 minutes on 9900k. It could take longer on less powerful CPU's.
06-25-2019 05:31 AM
doyll
Quote: Originally Posted by rul3s View Post
That makes a lot of sense.
Friday when I received the noctua I've made some tests, with H115i PRO before dissasemble I got 67º max temp on realbench.
30 minutes later, with NHU12A, got 74º on max temp with same test.
At first I was thinking about thermal paste, just need time to sit down, but, heatsink was really "hot" so thermal-conductivity was working good.
Maybe PBO was reaching higher than with CLC, I dont know now, but 100% agree that test should have been made with fixed voltage/freqs, now it's to late.
But I'm happpy with the change, NHU12A is not as big as I thought and its working pretty well and silent, so it's OK, but I'll keep in my mind that H115i PRO was performing better, louder, but better.
Keep in mind CPUs under air coolers should reach max temp in a few minutes, like 2 or 3, maybe 5 minutes. That is assuming CPU goes to 100% load as soon as test starts .. and case airflow is supplying air at or near room ambient to cooler.

Liquid cooling takes longer because it take longer for coolant to reach stabled load temp. The more coolant in the loop the longer it can take.

So your 30 minutes means it to that long for coolant to reach stable temp.

Below is graph of test run on my old i7-980. You can see how fast the temp stabilizes when load starts and ends. This was on PH-TC14PE cooler w/ TY-143 fans on it running about 1200rpm. Case had 2x front and 1x bottom TY-140 fans speed controlled by CPU temp idling at 600rpm and at about 900rpm when CPU was under load and heating up.
06-25-2019 02:38 AM
rul3s
Quote: Originally Posted by Ashura View Post
Thanks for sharing your results. Your build is super clean, looks great!.

Did you switch back to NH U12s?
Nope, my previous heatsink was a NHU12P, I've sold it and buy a NHU12A, the one you see on the pic.
06-25-2019 02:21 AM
Ashura
Quote: Originally Posted by rul3s View Post
That makes a lot of sense.
Friday when I received the noctua I've made some tests, with H115i PRO before dissasemble I got 67º max temp on realbench.
30 minutes later, with NHU12A, got 74º on max temp with same test.
At first I was thinking about thermal paste, just need time to sit down, but, heatsink was really "hot" so thermal-conductivity was working good.
Maybe PBO was reaching higher than with CLC, I dont know now, but 100% agree that test should have been made with fixed voltage/freqs, now it's to late.
But I'm happpy with the change, NHU12A is not as big as I thought and its working pretty well and silent, so it's OK, but I'll keep in my mind that H115i PRO was performing better, louder, but better.
Thanks for sharing your results. Your build is super clean, looks great!.

Did you switch back to NH U12s?
06-25-2019 12:58 AM
rul3s
Quote: Originally Posted by AlphaC View Post
Shouldn't test with PBO. PBO maximizes the CPU power until it hits the limit as long as temperature is below threshold.


If you're testing cooler performance you really need a fixed clockspeed and fixed voltage with a consistent repeatable load.
That makes a lot of sense.
Friday when I received the noctua I've made some tests, with H115i PRO before dissasemble I got 67º max temp on realbench.
30 minutes later, with NHU12A, got 74º on max temp with same test.
At first I was thinking about thermal paste, just need time to sit down, but, heatsink was really "hot" so thermal-conductivity was working good.
Maybe PBO was reaching higher than with CLC, I dont know now, but 100% agree that test should have been made with fixed voltage/freqs, now it's to late.
But I'm happpy with the change, NHU12A is not as big as I thought and its working pretty well and silent, so it's OK, but I'll keep in my mind that H115i PRO was performing better, louder, but better.
06-24-2019 04:45 AM
ciarlatano
Quote: Originally Posted by doyll View Post
More from the great poah .. is that just more poah to step in?

With a decent case setup with decent fans there is no downside.
Case with good fans flow air at or near room temp to components cooling as well or better than as well as quieter than CLCs .. and are much more dependable as well as lower priced .. meaning air cooling is clearly the choice of informed buyers.

A test bench is just that, a test bench.
But....but.....that would require setting up airflow correctly....that would be so hard and take moments of planning.....the other components in the system don't need cooling or airflow.....I wuv my Asetek.....

[img]https://media.giphy.com/media/14rc78gHGGXIFq/giphy.gif[/img]
06-24-2019 04:36 AM
doyll
Quote: Originally Posted by poah View Post
tuff - that is what happens when you use an air cooler. You are at the mercy of the internal case temp which is a major downside of an air cooler. of course if you actually use an open air test bench rather than a case it isn't an issue is it.
More from the great poah .. is that just more poah to step in?

With a decent case setup with decent fans there is no downside.
Case with good fans flow air at or near room temp to components cooling as well or better than as well as quieter than CLCs .. and are much more dependable as well as lower priced .. meaning air cooling is clearly the choice of informed buyers.

A test bench is just that, a test bench.
06-24-2019 03:06 AM
poah
Quote: Originally Posted by doyll View Post


This is even more true when those results include CLCs mounted as intake while air coolers are in middle of case usually wihtout near enough case airflow to supply them with air that is only 5c above room temp .. often it's 10c difference or more and every degree warmer the air into cooler is translates into almost exactly the same number of degrees hotter CPU is.

So a CLC mounted as intake giving a CPU temp of 65c while an air cooler mounted on CPU using 10c warmer air will be 75c when both air cooler and CLC are removing exactly the same amount of heat from CPU.
tuff - that is what happens when you use an air cooler. You are at the mercy of the internal case temp which is a major downside of an air cooler. of course if you actually use an open air test bench rather than a case it isn't an issue is it.
06-23-2019 11:43 AM
AlphaC Shouldn't test with PBO. PBO maximizes the CPU power until it hits the limit as long as temperature is below threshold.


If you're testing cooler performance you really need a fixed clockspeed and fixed voltage with a consistent repeatable load.
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