Dropped CPU Temperature 15 °C going from top rad mount to front rad mount with RTX 3080

pc-guy · 12 Oct 2020 at 22:58

gerardfraser said:
Well it is nothing fancy and I just moved fans around.

Have you tried top mount and stick 2 lots of 240mm fans on the front.

I think your poor cooking might ha e something to do with choking inside the case as only 1 intake vs 3 exhaust.

In the front mount situation you got the same issue. But the effect is negated cos the low pressure inside the case is helping airflow through the front fans if that make sense. So cooling performance is not affected.

gerardfraser · 12 Oct 2020 at 23:22

Not trying to be rude here,OK let me start by saying this ,it was not a problem ever temperature wise for me. Same case I used a RTX 2080 with AMD Ryzen 2600X/2x3600X/3800X/3600XT. After I put in 3 different RTX 3080 cards ,I just noticed and increase in CPU temperature.I was fine with increase in temperature.
So I made some changes and now the case fans run at lower RPM on same task and CPU temperatures are 15°C-16°C cooler from changing some stuff around. I am satisfied 100% with the changes and no need to do anything else,thanks for the tips but AMD Ryzen @ 4600Mhz only hitting 60°C PC gaming and say 70°C Cinebench20 multi is perfectly fine and needs no changes at all.I made the post for people who want to give this a try.

pc-guy · 12 Oct 2020 at 23:26

I would expect it to be 3-5 degrees difference under the current weather condition. Not 15 tho. Just curious about your original set up.

anyway as I said front mount Rads carry less risks

gerardfraser · 13 Oct 2020 at 00:14

Yes I understand the risk,thanks for the tip. I am not worry about any risk at all,5 CPU's,4 sets of DDR4,a couple motherboards,maybe 20 SSD's ETC in less than 2 years. I just like playing games and buying useless crap that does not make a difference in PC gaming.

I googled the rad placement,this guy Bitwit only saw 10°C difference. So lets say 10°C and 5 °C for bad CPU mount.All equal anyway 12:13 of video he has the results.
https://www.youtube.com/watch?v=xNAMxZgvves&ab_channel=Bitwit

hobib_ali · 13 Oct 2020 at 08:34

makes sense, the grills on my front facing fans catch way more dust than the grills on the top facing fans, indicating that i get more airflow from the front

might try and move the rad to the front and see what happens.......

Xyclops · 13 Oct 2020 at 09:26

IMHO airflow and temperatures should be best if air came in the bottom and out the top. That's the way air wants to go naturally due to heat rising.

Case design is not optimal for airflow, its a compromise to allow for the fact the computer may be on the floor where intake would be choked.

Most AIO would not come with long enough tubes to allow bottom mounting of course

gerardfraser · 13 Oct 2020 at 18:01

hobib_ali said:
makes sense, the grills on my front facing fans catch way more dust than the grills on the top facing fans, indicating that i get more airflow from the front

might try and move the rad to the front and see what happens.......

I would be interested and see your results,if you change things around.

deusexlumina · 15 Oct 2020 at 04:05

15 degrees is huge. Sure there wasn't some air lodged in the radiator and it went away when you moved things around?

esoteric · 15 Oct 2020 at 07:52

Top mount was exhausting hot air, pulling hot air through the rad.

Front mount is taking in cool air, pulling cool air through the rad.

No one has mentioned this until now???

Xyclops · 15 Oct 2020 at 08:15

esoteric said:
Top mount was exhausting hot air, pulling hot air through the rad.

Front mount is taking in cool air, pulling cool air through the rad.

No one has mentioned this until now???

The very first response said that

MartinPrince · 15 Oct 2020 at 08:37

I DON'T fancy boys said:
15 degrees is huge. Sure there wasn't some air lodged in the radiator and it went away when you moved things around?

It is not huge in the context of the amount of heat rising up from his 3080!
I'm not sure why people are looking for other explanations.

esoteric · 15 Oct 2020 at 10:10

Xyclops said:
The very first response said that

Aarrrghhh I even read the whole thread. It was even you that posted it!

Xyclops · 15 Oct 2020 at 10:28

esoteric said:
Aarrrghhh I even read the whole thread. It was even you that posted it!

Its ok. I'm used to not being noticed. LOL.

Blowsy · 15 Oct 2020 at 10:34

Gamersnexus has concluded that there isn't much in it in terms of top vs. front mounted rad.

As has already been said, front mounted intake rads mean colder air passes over the radiator and cools the CPU slightly better. The trade-off is that you now have warmer air entering the case, so the ambient case and GPU temps usually go up a little bit.

All in all though, if mounted properly with sufficient balance between intake and exhaust fans, then it's marginal.

Mr Oblong · 15 Oct 2020 at 12:47

subbytna said:
Ah this said a 3600. Didn't know it was an XT

We've also seen silicon quality improve over time. A new 3600 isn't as far off an XT as a launch 3600 would be.

jigger · 15 Oct 2020 at 12:56

Two questions,

What batch is the 3600
How did you buy three different 3080’s

The 3080 must have been saturating the case to see a 15c drop.

Slinky69 · 15 Oct 2020 at 16:23

Xyclops said:
Its ok. I'm used to not being noticed. LOL.

Who said that?

gerardfraser · 16 Oct 2020 at 03:14

jigger said:
Two questions,

What batch is the 3600
How did you buy three different 3080’s

The 3080 must have been saturating the case to see a 15c drop.

Do not know batch number cause I did not care.
Bought two RTX on Sept 17 2020 online,could have bought more.
Bought one at a store Sept 22 2020. I did not find it hard to buy a RTX 3080 in Canada.

Xyclops · 16 Oct 2020 at 06:16

gerardfraser said:
Do not know batch number cause I did not care.
Bought two RTX on Sept 17 2020 online,could have bought more.
Bought one at a store Sept 22 2020. I did not find it hard to buy a RTX 3080 in Canada.

Why would anyone need three 3080s? Also why would you be buying 5 different Ryzen CPUs over the course of 2- 3 years? Sorry, but I don't believe you.

Troezar · 16 Oct 2020 at 07:04

Why is everyone glossing over the 3080 was what changed things. Not surprising really as it is higher wattage and exhausts the hot air differently. In that particular case it's probably enough to increase the temps substantially.

I'm running 6 X 120mm in and 2 X 120mm out. Works well. I can recommend Demciflex case filters. Just order direct, cheap and easy enough and you can order in any colour you want. Great airflow and filter very fine dust particles.