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do fan positions on the card matter?

post #1 of 8
Thread Starter 
i see some cards with the fan at the end of the card and the same card by the same company with a few cosmetic tweaks with the fan in the middle of the card particularly the evga 570 superclocked vs the HD version with the display port. is there a differance in cooling? is the regular superclocked better(higher price)? both have 128mb of vram the only differance being the display port and the center mounted fan and hd being slightly smaller.
 
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omnius
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post #2 of 8
Yes, theres is a difference in cooling. The cards with the fans at the end (Reference 570) will generally be forcing the air over a heatsink and out of the pci bracket on the back of the case. The other type of card with the fan in the middle (GTX 570HD) will be blowing the warm air inside of the case.

Middle fan - Internal Exhaust

Blower fan (end) - External Exhaust.
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post #3 of 8
Difference can be substantial.

Just be aware that fans at the end of the card typically blow the hot air out to the back of the case, while fans throughout the length of the card typically blow the hot air in to the case.

I purchased the MSI 560ti because of it's superior cooling ability (at least 20-30C cooler during load) over my EVGA GTX 470:
http://www.msi.com/product/vga/N560GTX-Ti-Twin-Frozr-II-OC.html vs. http://www.newegg.com/Product/Product.aspx?Item=N82E16814130550

It dumps heat into the case, but it isn't that big of an issue since I have plenty of exhaust fans anyway, and a side panel that is completely mesh (NZXT Vulcan: http://www.nzxt.com/new/products/crafted_series/vulcan)
post #4 of 8
OP your rig's name: the great POS laughingsmiley.gif

anyways, usually reference designs are louder but if your case airflow requires you to keep ANY MORE heat out of the case, reference, the ones with the fans on the end, would be your pick.

However people choose the middle fans because they usually run much cooler @ much lower RPMs meaning quieter & cooler at the expense of exhausting half of it inside your case. If you have decent case airflow, then you don't need to worry about that!
post #5 of 8
Thread Starter 
so if im using a HAF 932 for my build it shouldn't matter what one i choose?
 
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omnius
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post #6 of 8
Doesn't work exactly like that. Even though the HAF 932 is known to be "a good case" that does not mean you can stop thinking about airflow.

Personally I'd go for SLIGHTLY positive pressure, more air in than out. So your case doesn't become a dust magnet & you have proper cooling.

This not authoritative, just to get your feet wet.
http://www.techpowerup.com/forums/showthread.php?t=42853



SO, what kind of fans do you have on that?
post #7 of 8
Thread Starter 
ordering parts next month but for the most part all stock fans(dont have extra $$ in the budget for fan upgrades, yet) in stock config, though i may reverse the polarity of the side fan to have it exhaust if it isnt already/ if it is needed, but i will be using medical grade dust filters so dust doesnt really bother me. i think im going to go with the regular 570 over the hd version since the monitor im looking at(asus vs248h-p) doesn't have a display port.
 
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post #8 of 8
Quote:
Originally Posted by swarm87 View Post

ordering parts next month but for the most part all stock fans(dont have extra $$ in the budget for fan upgrades, yet) in stock config, though i may reverse the polarity of the side fan to have it exhaust if it isnt already/ if it is needed, but i will be using medical grade dust filters so dust doesnt really bother me. i think im going to go with the regular 570 over the hd version since the monitor im looking at(asus vs248h-p) doesn't have a display port.

Your understanding of dust filters is a little bit incorrect. Dust filters in a negative air pressure block only the entrances where fans are taking in air. However, if there is no filtration wherever the case has air coming in, there will be dust.

In a positive pressure case, air is trying to escape so the only place where air is entering are where your fans are sucking in air.

Ina a negative, more air is being exhausted meaning all potential inlets for air become potential for dust. The antec 900 is a clear example of a negative pressure air case that is a dust MAGNET.

The fan on top is large and so is the psu, so two 120mm intakes are dwafed by the top, rear, and psu/GPU exhaust meaning dust is accumulates faster.

It's not a big deal, it just saves me ten minutes every now and then and it's something I don't have to be that think about as much. Also knowing I did it the way I planned to is part of why it's valuable.

I recommend try using the side fan as intake since not much hot air is not going to be exhausted from that area. Try both. See what your temps are. I'm guessing intake...
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