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How will my side panel fan improve video card temp?

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a c 164 ) Power supply
a c 235 U Graphics card
November 2, 2010 12:38:17 AM

I decided to run a few tests to see how a side panel fan can improve GPU temps.

video cards
factory OC MSI GTX 460 cyclone
factory OC MSI GTS 250 Twin Frozr

Benchmark
looped the RE 5 benchmark tool to run 5x.
captured the high GPU core temp at the end of the entire loop with HWmonitor

case
I used an antec 300 with 4 fans. two 120mm antec tri-cool fans @ 1200rpm up front as intake. a rear exhaust with a 120mm enermax silent fan @ 1000rpm. up top a second exhaust with a 140mm enermax silent fan at 750rpm.

i ran each video card in the benchmark loop to grab high temps. then I installed a 5th fan on the side panel, 120mm antec-tri cool @ low speed (1200rpm) as an intake to blow air onto the video cards.

guess what the difference in temps was? :D 



a c 277 ) Power supply
a c 196 U Graphics card
November 2, 2010 12:47:39 AM

With that many fans in an Antec 300 the air should be moving pretty quick normally so im going to guess that pulling the side panel boosted temps by about 2C.
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a c 274 ) Power supply
a b U Graphics card
November 2, 2010 12:57:34 AM

2-3C improvement would be my guess.
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a c 77 ) Power supply
a b U Graphics card
November 2, 2010 1:09:17 AM

I say a negative impact as it effected the "air flow" balance or at best 0 impact.
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November 2, 2010 1:38:54 AM

I reckon that although the air was moving accross the case, it was not perfect.
2x 120mm antec@ 1200rpm = 2x39 CFM On up one down was balanced.

Intake = 2 x 39 = 78CFM
Exhaust = 44 (120mm) + 45.4 (140mm) = 89.4 CFM
So extra air will be take out of the case.
I'm also guessing that you have two main flows of air , one bottom and one top so that the cards are in the middle and don't benefit as much from the air flow.
So I reckon that if they are already hot, a bigger difference.
I'll guess at 10 - 20C.
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November 2, 2010 2:17:44 AM

2 to 3 deg celcius cooler
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a b ) Power supply
November 2, 2010 3:09:42 AM

i hate guessing. just to be different: my guess is it got 1555555 degrees HOTTER :lol: 
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a c 91 ) Power supply
a b U Graphics card
November 2, 2010 3:52:56 AM

With reference to the Sniper normal vs the black edition, the side fan does not makes that much of an impact.. So, apart from a sure shot increase in the overall noise levels, my guess is the temperature difference was mostly negligible.. If i have to choose between positive and negative, i'll vote for positive though..
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a b ) Power supply
a b U Graphics card
November 2, 2010 6:25:16 AM

No change, or may even a slightly worse temps than before.
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a c 164 ) Power supply
a c 235 U Graphics card
November 2, 2010 5:34:53 PM

well here are the results

with side fan / without
GTX 460 53c / 48c
GTS 250 70c / 66c


I was not surprised as I have done a similar test with a rosewill case (one 120mm in / one 120mm out) and an Nvidia 9800GT a few years back. The results where the same as the side panel fan increased temps.

One more test proving that more is not always better...unless we are talking about jumbo shrimp & cocktail sauce :love: 
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a c 164 ) Power supply
a c 235 U Graphics card
November 2, 2010 5:43:51 PM

Plumble said:
I reckon that although the air was moving accross the case, it was not perfect.
2x 120mm antec@ 1200rpm = 2x39 CFM On up one down was balanced.

Intake = 2 x 39 = 78CFM
Exhaust = 44 (120mm) + 45.4 (140mm) = 89.4 CFM
So extra air will be take out of the case.
I'm also guessing that you have two main flows of air , one bottom and one top so that the cards are in the middle and don't benefit as much from the air flow.
So I reckon that if they are already hot, a bigger difference.
I'll guess at 10 - 20C.


the bottom intake fan blows onto two HDD
the top intake fan has a clear path to the video card blowing directly on the back end of the card where the ram is. the side panel is right next to the video card so all the air from the panel blows directly over the card.
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November 2, 2010 8:34:46 PM

let me put a negative in front of my 2 to 3 degrees answer (goes to edit post lol not)
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November 2, 2010 10:02:19 PM


ct1615 said:
the bottom intake fan blows onto two HDD
the top intake fan has a clear path to the video card blowing directly on the back end of the card where the ram is. the side panel is right next to the video card so all the air from the panel blows directly over the card.


I did underestimate your airflow design.

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a b ) Power supply
November 3, 2010 3:27:22 AM

i was right!
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a b ) Power supply
a c 172 U Graphics card
November 4, 2010 12:55:10 AM

not much of a surprise for me either, i have found adding more intake fans always increases temperature. Best bet is to have negative pressure in the case drawing hot air out. Test again by making that gfx card fan an exhaust fan.
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a c 164 ) Power supply
a c 235 U Graphics card
November 4, 2010 12:59:32 AM

iam2thecrowe said:
Test again by making that gfx card fan an exhaust fan.


temps go up even more. even though their is no side panel fan there, I can put a Kleenex next to the port and it will stick to the side panel because of the suction. its obvious the video card coolers use it to bring air in but obviously with a fan there seems to be an issue with airflow that increases temp.
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a c 164 ) Power supply
a c 235 U Graphics card
November 4, 2010 11:57:39 PM

Best answer selected by ct1615.
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a c 164 ) Power supply
a c 235 U Graphics card
November 4, 2010 11:59:20 PM

techmo was the first to answer with a negative impact answer

shovenose and Herr_koos also proved their air flow knowledge
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a b ) Power supply
a b U Graphics card
November 5, 2010 6:00:04 AM

Cool! Do I win a prize? :D 
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a b ) Power supply
November 5, 2010 11:58:32 PM

is gonna push really hard towards getting a prize too then...or should i say shove instead of push :D 
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a b ) Power supply
a c 271 U Graphics card
November 6, 2010 12:22:46 AM

This topic has been closed by Mousemonkey
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