Question Antec symphony 360 aio and iit seems not working properly

[respect911]

Hi there! I have built a new pc.
Antec p20c
Intel 14700kf
Antec symphony 360 on the top of the case
Gigabyte gaming x ax
Rtx 3090
Samsung 990 pro
Front 3 fans for intake 1800 rpm
Rear 12 fan exhaust 3000 rpm

Now , somehow i have used for several days my pc and feel it just cool and quiet , too quiet .
Launched on my previous pc OMEN HP 30l linx benchmark and it sounded like a jet plane taking off. Also a very hot air was thrown out from radiator of pc cooler. But pc arrived 100 c after 17 minutes.


Launched on my setup (antec) linx and i got after 3 minutes 100c and no hot air noticeable . Every fan is working and there is a massive intake but the symphony 360 outtake are slightly warm. Impossible for 14700 in benchmark !

Im afraid something is assembled wrong there.

Any advice what to check ? Where to dig ? Feels like its not taking the heat from the processor properly. Somehow

 

[Phaaze88]

I'm a little confused with:

Launched on my previous pc OMEN HP 30l linx benchmark and it sounded like a jet plane taking off.

Launched what application on a Omen 30L? What's linx? Linux? Linpack?
A 360mm doesn't fit in a 30L last time I checked, so how...?
Is the 30L using the same Gigabyte Gaming X AX board?

Launched on my setup (antec) linx and i got after 3 minutes 100c and no hot air noticeable . Every fan is working and there is a massive intake but the symphony 360 outtake are slightly warm. Impossible for 14700 in benchmark !

Impossible? It's totally possible, if you:
-run impractical benchmarks/stress tests.
-run motherboard defaults. Some of them are aggressive with their power settings or run overclocks out of the box.
-https://www.techpowerup.com/review/antec-p20c/
Referring to some of the comments from that review, the case is over-filtered at the front, and I can see what they mean.
That shape of perforations in the metal front panel can do more harm to airflow than good. And why did Antec need to run these bars across the filter, instead of being the same as the top panel filter? There was too much attention to style = airflow reduced.

 

[respect911]

"I will be more understandable this time. I have written the configuration of the computer. The program I use is LinX-0.6.5 for Windows. Additionally, I check the temperature using HWMonitor Pro 1.53 x64. As I mentioned before, the computer is built from scratch. The CPU cooling involves a top-mounted cooler and air intake from the front through three fans, while the air is pushed out at the back by one 12-inch fan. I am attaching a screenshot of the temperature. What bothers me is the absence of a hot air flow from the CPU radiator. As I mentioned earlier, in my previous computer, when I ran a benchmark, the CPU radiator fan would kick in after about three minutes, running loudly, and there was a noticeable hot air flow. However, here, I don't observe any hot air flow, and it worries me. If I see that the processor is at 100 degrees but there's no hot air flow from the radiator, I assume it's not cooling properly, especially if it's reaching 100 degrees within 3 minutes. I'm attaching screenshots."

5 minutes of benchmark at Antec p20c
NO hot airflow from radiator. Slightly warm

same time same benchmark at OMEN 30L 10700K

And massive hot airflow from CPU radiator.

View: https://youtube.com/shorts/MyFmhJ6t7yE?feature=share
- OMEN SOUND OF RADIATOR

View: https://youtube.com/shorts/mvtx8Ku8CVA?feature=share
Antec symphony 360

I hope I explained the issue better this time

 

[Phaaze88]

Mmmk, I got a much better idea now - it doesn't sound like anything's wrong with the cooler at all, but you didn't really know what was going on. Your original post read like both PCs were running a 14700K too.

So LinX appears to be one of those extreme benchmarks that puts too high of a load to be practical.

If you're going to be running benchmarks/stress tests like that, you should be experimenting with your own custom settings, and not the motherboard defaults.


"What bothers me is the absence of a hot air flow from the CPU radiator."
You can't trust what your hand feels. That doesn't mean the cooler isn't working - see below.

The 10700K is easier to cool due to being built on a larger lithography. The hot zones/spots on it are larger, and thus easier to transfer the thermal energy from the die up to the cpu cooler; the thermal density is higher.
All this lithography/die shrinking has brought us to a hard wall in regards to moving the heat from these tiny zones effectively.

I can tell from your screenshots that the Omen's mobo isn't running an overclock(and following the Intel spec), but the other board is, by looking at the Powers section.
The 10700K has dropped down to the 125w PL1 state after the time limit for turbo boost(229w PL2) has expired, which is 56 seconds by default.
The 14700K, on the other hand, has exceeded its 253w PL2 and appears to have stayed up there the entire duration of the test.


What we then have is:
Scenario A(Omen)
Though this cpu is easier to cool than the other, it takes longer to hit 100C because it's running 125w for the remaining duration of the test, combined with the poor case airflow and small cooler.

Scenario B(DIYPC)
Hit 100C in a scant 3 minutes, even though there's a larger cooler than what's in the Omen, and the case should have better airflow.
Cpu has greater thermal density, is overclocked and never eased up on the power.

There's only so much cooling one can brute force on the higher fluid volume of an AIO, before the wall becomes the very silicon they are trying to cool, among other things.


I believe your results are as expected. If you tune the DIYPC's power limits and turbo duration to that of the Omen's, it should take longer to hit 100C - I'm not going to say it won't hit 100C, because of how extreme LinX apparently is.

 

[respect911]

This is the broadest and most accurate explanation I've ever received on a forum. Thank you so much! Indeed, Scenario A works at the standard frequency as if it was bought in the store. My assembled computer works the same way, but it was already overclocked out of the box. My CPU cooling system can handle TDP 250 watts, while the processor reaches TDP 273, and obviously, it can't cope. I adjusted the voltage in BIOS, reduced the power by 0.100, and that's it. The processor no longer exceeds 80 degrees, and the power doesn't go beyond 248 watts.

here some screen
Linx

done without errors and no OVERHEAT

And then i have turned aida stress test to make sure. 2 hours and no overheat.
I believe that undervolting is the best solution.
Here is the spec after the benchmark - maximum temp of the package is 85

I don't think I'll find a 360 cooling system that can handle a 300 TDP. So, by reducing the power, I've lost a bit of performance, but now the processor operates within a temperature range where it feels normal

 

[Phaaze88]

👍👍

I don't think I'll find a 360 cooling system that can handle a 300 TDP.

A 360mm rad/loop should theoretically handle up to, but not exactly, a 350w heat load, but in practice, it doesn't get to happen, because of a number of factors that reduce cooling efficiency.
-multiple layers between cpu die and the fluid in the loop. Each additional layer = reduced effectiveness.
-even if the pump rpm is maxed out, AIOs have low fluid flow rates(compared to custom loop).
-the fluid volume in AIOs is lower than custom loop.
-the popular radiator orientation of roof-mounted-exhaust gets most of its air from the warmer case ambient. An active gpu will increase this value. This affects low and high load thermals at about a 1 to 1 rate compared to a unit being used as the less popular front intake.
-the fan curves relative to the end user's comfort zone.

 

[Albert.Thomas]

Hi there! I have built a new pc.
Antec p20c
Intel 14700kf
Antec symphony 360 on the top of the case
Gigabyte gaming x ax
Rtx 3090
Samsung 990 pro
Front 3 fans for intake 1800 rpm
Rear 12 fan exhaust 3000 rpm

Now , somehow i have used for several days my pc and feel it just cool and quiet , too quiet .
Launched on my previous pc OMEN HP 30l linx benchmark and it sounded like a jet plane taking off. Also a very hot air was thrown out from radiator of pc cooler. But pc arrived 100 c after 17 minutes.


Launched on my setup (antec) linx and i got after 3 minutes 100c and no hot air noticeable . Every fan is working and there is a massive intake but the symphony 360 outtake are slightly warm. Impossible for 14700 in benchmark !

Im afraid something is assembled wrong there.

Any advice what to check ? Where to dig ? Feels like its not taking the heat from the processor properly. Somehow

An i7-14700K is not an easy CPU to cool. Most AIOs will reach their peak temperature in a stressful bookmark. I'm not familiar with linx benchmark, but something like Cinebench on Windows will cause the fans to run at full speed with most AIOs. If you don't want the cooler to run loudly, set a fan curve in your BIOS.

 

[respect911]

👍👍



A 360mm rad/loop should theoretically handle up to, but not exactly, a 350w heat load, but in practice, it doesn't get to happen, because of a number of factors that reduce cooling efficiency.
-multiple layers between cpu die and the fluid in the loop. Each additional layer = reduced effectiveness.
-even if the pump rpm is maxed out, AIOs have low fluid flow rates(compared to custom loop).
-the fluid volume in AIOs is lower than custom loop.
-the popular radiator orientation of roof-mounted-exhaust gets most of its air from the warmer case ambient. An active gpu will increase this value. This affects low and high load thermals at about a 1 to 1 rate compared to a unit being used as the less popular front intake.
-the fan curves relative to the end user's comfort zone.

Arctic Liquid Freezer II 360 - will do better job if i swap my symphony ?​

 

[Phaaze88]

Arctic Liquid Freezer II 360 - will do better job if i swap my symphony ?​

Not necessarily, no. I wish I had a concrete answer for you though.
If this was a Ryzen cpu, I'd be sure the LF II would do better, in part due to Arctic's offset mount for Ryzen.