CPU stress test comparison in detail
First, let’s look at the data again when my AiO – due to clogging – refused service without permission. Well, refused not completely, but performance plummeted significantly! By the way, I noticed this while gambling. Here the CPU temperature was at 80 degrees despite GPU limit. This made me wonder and implied an immediate investigation. See below: room temperature was 20.2 degrees!
The CPU temperature at idle was between 54 and 60 degrees Celsius.You can see it very well on the detail section. I started Cinebench R23 and within a few seconds it suddenly looked like this. I didn’t want to subject the CPU to a run with Prime95! Note, I’m running the AMD Ryzen 5800X with PBO and the Windows is set to ultra performance (power options). Do you have to do it like that? No, but I want to!
I wasn’t really excited about that! In the end, it didn’t look any different….
First suspicion: too little contact pressure – has not been confirmed. Even the reapplication of thermal paste has not changed anything here. So that leaves only the AiO itself as the cause. You know the rest from Igor’s article!
How does it look now after the conversion to the water features from Alphacool? Let’s start with Cinebench R23. The temperature at idle is now 42-45 degrees and that is already much better! The room temperature at the time of the measurements was 19.6 degrees.
Pump fan 1 is the CPU block of the Alphacool Eisbaer Aurora 360 and runs at 100%. The fans rotate up to 80 degrees CPU temperature with 900 rpm and are pleasantly quiet. From 80 degrees upwards, the fans rotate up to 1800 rpm, which is clearly audible. Since it is an open structure, this is unavoidable! The fans can even rotate up to 2800 rpm, only that brings nothing more in cooling on the CPU except noise. Again, this is not due to the cooling itself, but to the issue: asymmetric chip design + 7nm = modest heat flux density. There is currently no cooler against it, because you can not cheat the physics!
This is a familiar picture, it was the same with the old 360 AiO. Seconds after starting Cinebench R23, the CPU goes just over 80 degrees, which is not too bad and much better than 90 degrees plus!
At the end of the run 84 degrees are on the clock, which sounds a lot at first, but is completely normal with my settings. The Ryzen 3000 or 5000 owners, will know this in a similar form! Since I wanted to know what would happen if I unleashed the maximum perv on the CPU, I finished by running Prime95 (max power/heat/cpu stress with small FFTs) on the Ryzen 7 5800X for just under an hour. That’s what it looks like in the end!
That’ll make any radiator sweat! Because 155 watts on the 7nm asymmetry has a very different effect than 300 watts on the Intel Core I9-11900K. That’s better to cool! So now the performance of the water block for the GPU, let’s see what happened there.
GPU performance under water
If you have an NVIDIA GeForce RTX 3080 FE, you’ll know it when the fans really start to whine. Because the card gets really warm under load, there are easily 80 degrees on the GPU and on the memory inside. NVIDIA put a lot of emphasis on the design, which I find absolutely successful, but you notice that in the cooling performance. The cooler of the RTX 3080 FE gets rid of the waste heat, but you can hear it when working. And it’s pretty clear, especially in the open setup! So what does the ice block from Alphacool do?
Furmark heats up the GPU properly, after about 30 minutes it looks deeply relaxed! Maximum 46 degrees on the GPU and 62 degrees on the GDDR6X memory. The card went up to 320 watts and you can’t hear anything! The Alphacool ice pump (system fan 1) is spinning at 100% at about 4500 rpm. And that’s a good thing! System fans 4 and 5, these are the 2×3 fans that blow through the 360 x 45 mm radiator in the push-pull configuration. They just turn their rounds at about 1100 rpm. All you hear is a low hiss. That makes a total of 36 dB (A) and does not bother me in any way. The only thing that’s annoying now is that you can always feel the RTX 3080 FE’s voltage converters especially well at high FPS. Advantage, if you don’t hear them, then you know right away that you’re playing at low frame rates. The GPU clock stays nailed down at 1995-2010 MHz, thanks to the Alphacool water cooling. That makes the heart laugh!
So, let’s take stock of the situation. Last page please!
17 Antworten
Kommentar
Lade neue Kommentare
Veteran
Moderator
Veteran
Moderator
Urgestein
Moderator
Moderator
Urgestein
Urgestein
Moderator
Urgestein
Moderator
Urgestein
Mitglied
Moderator
Alle Kommentare lesen unter igor´sLAB Community →