CPU Cooling solution for 7950x

Kavalier · 30 May 2023 at 09:15

Hi everyone good morning.

I am looking for some suggestions on how to better optimize my current cooling setup.
The following are the specs of my current rig.

Case: View 71 Tempered Glass RGB Edition
Motherboard: MSI MEG X670E ACE Motherboard ATX
CPU: 7950X
Graphics Card: Sapphire RX 7900 XTX Nitro+ Vapor-X 24GB GDDR6 113
AIO: Antec Vortex 360
Fans: Front: 3*Lian Li PC Fan 120 mm UNI FAN SL120 V2, Top(Used for AIO Radiator) Lian Li PC Fan 120 mm UNI FAN SL120 V2 and 1* Lian Li PC Fan 140 mm UNI FAN SL120 V2

With undervolting -30. my temps CPU Temps are still peeking at 90 degrees.
Could it be that the Antec Vortex is not able to dispose of the heat fast enough? Also would adding another 3 Lian Li to the Right Side help with the cooling?

Thanks for your input as always.

Kavalier · 30 May 2023 at 10:38

mickyflinn said:
Are you talking all core load on the CPU 7950x runs under all core loads?

Take the side panel off the case and see if temps drop.

The 90 degrees is the package. And I tried this with the side panel backside off.

Kavalier · 30 May 2023 at 11:29

Hmm, not used yet to have the CPU running at these temps

Do you recall if I get the MSI Meg, considering it has a better pump, I would see maybe lower 80s 70s?

Kavalier · 2 Jun 2023 at 14:15

So, I did an experiment today, with both side panels removed, and dust filter top and front removed, my CPU temp are max 54 degrees!! while playing Diablo 4.
Does that mean that with the side panels close, the air is not getting out fast?
Having said that I am puzzled cause I have 3 120m as intake and 4 exhausted, 3 top(rad) and 1 140m at the back.

Kavalier · 2 Jun 2023 at 15:53

alec said:
normal for gaming load
it is not due to side panels

My personal preference is to put AIO in front to intake coolest air possible. However good the airflow is, adding not insignificant amount of watts from GPU will not improve things.
But note that even if it will cool slightly more effectively, it won't stop CPU hitting 90 deg in some situations.

I disagree, that is not normal for a 7950x. Before I was getting 85-90 degrees while gaming. So this helped a lot.

Kavalier · 5 Jun 2023 at 10:46

Mcthommo said:
have you tried undervolting it- I manually dropped mine to 4.8 all cores with .98v and in cinebench multi core max temp is still under 55C on air

Yes, I did a -20 per core undervolt. With panels open temps are the following:
Normal gaming(no intense stuff) 50-55 degrees
Intense: Raid/Many activities: 60-75 degrees

This is with Panel opens. Panels closed it goes to 80-90.

If it is airflow issue, cannot understand how it is possible. The view71 is not a small case, and in my opinion got a good fans setup.

Kavalier · 6 Jun 2023 at 13:37

Meddling-Monk said:
Hmmm, the only reason I can think of that could be causing bad airflow, is if you have banks of fans facing the wrong way, or using an all positive, or all negative pressure setup. Have you checked all fans have a flow direction? Like cool intake from front to rear or top of case? And not something like all exhausting outwards?

Yes, fans are facing the correct way. Confirmed that multiple times.

Kavalier · 13 Jun 2023 at 11:56

Meddling-Monk said:
Hmmm, then the only question I have left here is, "Is this your case?"

View 71 Tempered Glass RGB Edition

View 71 TG RGB is a stunning full tower case which comes with three preinstalled 140mm Riing RGB fans and can support motherboards up to E-ATX.

uk.thermaltake.com

Because I'm looking at that, and think you may be right earlier on; either the built up heat is not escaping fast enough, or, you're starving the insides of the case of any cooler air; you do after all have a 7900XTX there as well which will dump the heat out into the internals as well.

This might sound counter intuitive, but can you either swap your Rear Exhaust fan to become an Intake? (Easiest test to do)
Or
Swap your Exhaust fans on the top AIO to become Intake instead? (This is to test if more positive air pressure will help, or if it's an exhaust issue, but given that you already have 4 fans exhausting, it actually sounds like it's lack of cooler air available that's the issue and to move the built up heat out, and the leaky sides of this case may actually be compounding the issue somewhat if pressure is rather neutral - which it could be given 3/4 setup)

Have a go at one of those and see if it helps (my preference would be the top AIO going from Exhaust to Intake though, just to eliminate without a doubt that it's not an issue with bad airflow due to a rather neutral setup, since it's a 6/1 setup then and heat will be pushed away out the leaky gaps on the sides rather than linger inside the case waiting on the the AIO Exhaust to remove alone the CPU adn GPU temps).

Hello, sorry for my late reply. Was a bit busy.

Correct that is the case that I currently have.
Will try this fan setup change this weekend and get back to you.

Kavalier · 13 Jun 2023 at 11:58

A detail that I forgot to add it, the GPU will be vertically mounted.

Kavalier · 17 Jun 2023 at 14:53

Meddling-Monk said:
That's fine, we know the GPU (as I have it too) can just throttle down properly anyway if needed (for now whilst you test).

The key thing you want to know from turning the AIO fans (preferred test) from Exhausts to Intakes or the Rear fan, is if there's enough pressure to push the air in/out as needed (and take the warm air out along with it) through the leaky sides of the case. Because of that case design, the leaky gaps means if the fans are setup rather neutral (like your 3/4 setup), the heat (if it outputs faster than you can remove) might be just soaking everything inside and temps are just going to be higher. But if we give it enough pressure (positive in this test example hopefully through a 6/1 fan setup) to move everything out via those leaky gaps (and the Rear Exhaust), hopefully that'll show that it was merely an airflow and pressure issue and then you can decide then on what remedial action to take. (Different fans - if the fans aren't doing it, or if the AIO fan direction change was enough - whether to make it permanent or not).

Right now, it could be any number of factors, so you may as well eliminate the quickest one first before you spend (even more) money to solve it.

Sadly I did not see much difference oddly enough with the changes, which I found strange.
I have decided to replace the case.

So far from some research in terms of performance and also looks, Phantkes NV7 caught my eye, since I can have a proper airflow setup with 5 exhaust fans.
Having said that I am up for other recommendations.

Thanks again for the support/ideas that you have shared so far.

Kavalier · 19 Jun 2023 at 11:07

Meddling-Monk said:
That's unfortunate. Had hoped that the change in fan orientation would make it less expensive a change.

Are you populating all the fan spots? So going for a 7/5 setup? (7 intake and 5 exhaust?) As it looks like that case can do that and should be able to keep the fans at a lower speed as well, thereby also reducing noise produced.

If you're after case recommendations, you might also want to start a thread over on the case subsection. Probably get more eyes on it.

I have not populated all the fans spots (sides missing only) Noise is not an issue tbh. When using PC I use headphones and due to the glass panels, sound is concealed.
Yes raised a thread already in the Case section, and am doing some research on current and upcoming cases.