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GIGABYTE Z77X-D3H, MSI Z77A-G45 - 16/16/8, Airflow, SLI

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August 15, 2012 7:19:30 PM

I have a questions in regard to these motherboards:
- GIGABYTE Z77X-D3H http://focus.sk/product.asp?ID=24980
- MSI Z77A-G45 http://focus.sk/product.asp?ID=25055
1. are these motherboards in regard to PCIe 16 3.0: 16/16/8?
MSI writes http://www.msi.com/product/mb/Z77A-G45.html#/?div=Basic
in "Basic Specification" SLI N/A, Crossfire yes. Wont SLI worki on this motherboard?

2. when i looked for motherboards that have free space under third PCIe 16 slot, so the 2nd and 3rd graphic cards can be cooled via air flow from front fan, i could not find anything in range 130-200 EUR. All i could find were 350+ EUR motherboards that have 4 PCIe 16
http://prohardver.hu/dl/cnt/2011-10/78535/4-way_sli_on_...
but even here i cant understand how air flow could work with 4 dual slot cards ..

thank you
Revro
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a c 487 V Motherboard
August 16, 2012 5:35:11 PM

revro said:
what about the airflow issue and motherboard slots for 3 way sli/cf?

many motherboards have 2nd and 3rd pcie slots just 2 slotspaces away from each other so airflow would suffer a lot.
i also red that 690 sends a lot of air back inside the case
http://www.tomshardware.co.uk/forum/viewbbcode.php?conf...
from topic
http://www.tomshardware.co.uk/forum/353499-15-performan...

thank you
revro

I can't speak for the air flow issue with boards that squeeze the cards that close together. Perhaps that's a necessity when you try to pack 3 double-wide cards into a 7 slot motherboard. Afterall, the double-wide cards must take up 6 slot spaces out of the 7. And it's not practical to make the very last slot the PCIe X16 slot; the card would cover the wiring headers at the bottom of the board.

I imagine folks that go the 3 or 4 card route, use an aftermarket cooling solution in place of the stock coolers on the cards. Or possible place fans where they can move large quantities of air across the cards. I have a 140mm side fan blowing air across my 2 GTX 570s even though they have a slot space between them.
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August 16, 2012 6:50:26 PM

well i know the third gpu wont get taxed very much, but second card would naturally have problems with cooling if its fan is closed off by third card, whoose own ventilation is limited in a midi tower

i reviewed now a lot of motherboards so i assume dual sli is solution for 99% of mainboards if one doesnot want to go into watercooling, then 3 way sli/cf is possible but it costs a lot of money to have it custom made. i myself have 2 left hands so i guess i will make myself a 2 way sli gtx 685 4gb once they are relased. 2 gtx 690 would be waste of money, electric power and gpu power as 4 cores cant be utilized in efficient way by these dual gpus and they all have just 2gb of vram for usage.

thank you
revro
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a c 487 V Motherboard
August 16, 2012 7:31:53 PM

Not only that, but the 3rd card is almost always stuck with 4 PCIe lanes only. The 3rd card might eliminate the micro-stutter phnomenom, though... http://www.tomshardware.com/reviews/radeon-geforce-stut...
But I doubt you'd have an issue with that anyway because of the high-end cards you chose. So far, I haven't noticed M-S with my 2 570s.
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August 19, 2012 9:41:53 AM

Best answer selected by revro.
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a c 329 V Motherboard
August 19, 2012 9:39:52 PM

This topic has been closed by Nikorr
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