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Reload this Page Running cards in crossfire puts alot more heat onto both cards?

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Old 06-26-09   #1 (permalink)
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Default Running cards in crossfire puts alot more heat onto both cards?
i just took my 2nd card out because i wanted to see how far i can overclock both individually.

when i booted into windows with just 1 card i noticed that its temps were different.

both cards
core: 71
mem: 79
shader: 75

one card
core: 55
mem: 60
shader: 57

room temps were exactly the same


wats going on!


EDIT: posted temps
Last edited by anonymous.gamer : 06-26-09 at 12:11 AM
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Old 06-26-09   #2 (permalink)
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Well if you're not WCing them, they're sitting right on top of eachother... fighting for air and the top card gets some of the bottom's heat... So yeah, they're going to be hotter.
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Old 06-26-09   #3 (permalink)
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The top card will be alot hotter if you run in crossfire.
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Old 06-26-09   #4 (permalink)
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Quote:
Originally Posted by Angmaar View Post
The top card will be alot hotter if you run in crossfire.
That is because heat rises...just in case you were wondering why lol.
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Old 06-26-09   #5 (permalink)
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Funny - my setup is the opposite....

My 1gb 4870 uses less power and is cooler than my 512mb card.....and the 1gb is on top

According to GPU-Z @ folding load:

1gb = 49a - ~71c
512 = 51a - ~74c
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Old 06-26-09   #6 (permalink)
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your using 4870's, the fan blos down. card 1 is blowing hot air all over card 2, its nasty! with single slot cards like the 4850, the fan blows up. My setup is like yours, top card runs coolest, bottom card runs hottest.
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Old 06-26-09   #7 (permalink)
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Quote:
Originally Posted by scottath View Post
Funny - my setup is the opposite....

My 1gb 4870 uses less power and is cooler than my 512mb card.....and the 1gb is on top

According to GPU-Z @ folding load:

1gb = 49a - ~71c
512 = 51a - ~74c
Do they both use the same coolers?


Quote:
Originally Posted by ItsTopher View Post
your using 4870's, the fan blos down. card 1 is blowing hot air all over card 2, its nasty! with single slot cards like the 4850, the fan blows up. My setup is like yours, top card runs coolest, bottom card runs hottest.
Assuming that the have dual slot coolers most of the air blows out the back...
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Old 06-26-09   #8 (permalink)
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Yep - same cooler - the stock reference one....

ItsTopher - what do you mean blows the heat at the other card? it sucks in from the fan and puts all the heat out the back of the case - unless you mean heat coming from the vregs....?
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Old 06-26-09   #9 (permalink)
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My Top cards runs 5C hotter idle and same under load. When in CF my 4870 gets from 70C to 75C under load.

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Old 06-26-09   #10 (permalink)
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Quote:
Originally Posted by scottath View Post
Yep - same cooler - the stock reference one....

ItsTopher - what do you mean blows the heat at the other card? it sucks in from the fan and puts all the heat out the back of the case - unless you mean heat coming from the vregs....?
Sorry, I explained that pretty bad...the top card is intaking air from the very small space between card 1 and 2, almost suffocating card 2, making it noticable hotter. At least thats how I would explain it after watching my setup.
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