Could someone recommend me a motherboard for 4 cards?

mouser98

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Quote from: computerparts on June 11, 2011, 02:07:12 AM

Quote from: mouser98 on June 10, 2011, 10:47:49 PM

Quote from: computerparts on June 10, 2011, 10:42:05 PM

Quote from: mouser98 on June 10, 2011, 10:35:07 PM

here is the one that i got with 4 pci-e slots for $65

http://www.newegg.com/Product/Product.aspx?Item=N82E16813138318

That board only has two pci-e slots which can be used with video cards.

lol, tell that to my four 5830s then

If you are using risers on pci-e 1x slots for video cards, then you're killing the bandwidth. Might as well chop the card in half while you're at it.

getting 260 Mhash/sec out of each one, with 875 core clock and 900 mem clock, running at 59-64 C. ::shrug::

phenom

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Quote from: Dyaheon on June 11, 2011, 05:12:34 AM

Quote from: phenom on June 11, 2011, 05:01:57 AM

How do you guys get around the issue of not having enough PCI-E connections? I have a 850W PSU which should be able to manage 3x5870. But it only has enough PCI-E cables for 2 cards. Are these adapters fine :

PCI Express 6-Pin to 4-Pin Power Adaptor for PCI-E Graphics Cards

http://www.overclockers.co.uk/showproduct.php?prodid=CB-033-OK

Yeah. Didn't your video cards come with those adapters? I thought they always included those.

Dude, I completely forgot haha. Just checked the boxes and they have 2 each Roll Eyes

Dyaheon

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Quote from: phenom on June 11, 2011, 05:01:57 AM

How do you guys get around the issue of not having enough PCI-E connections? I have a 850W PSU which should be able to manage 3x5870. But it only has enough PCI-E cables for 2 cards. Are these adapters fine :

PCI Express 6-Pin to 4-Pin Power Adaptor for PCI-E Graphics Cards

http://www.overclockers.co.uk/showproduct.php?prodid=CB-033-OK

Yeah. Didn't your video cards come with those adapters? I thought they always included those.

phenom

newbie

Activity: 35

Merit: 0

How do you guys get around the issue of not having enough PCI-E connections? I have a 850W PSU which should be able to manage 3x5870. But it only has enough PCI-E cables for 2 cards. Are these adapters fine :

PCI Express 6-Pin to 4-Pin Power Adaptor for PCI-E Graphics Cards

http://www.overclockers.co.uk/showproduct.php?prodid=CB-033-OK

jonnynogood

newbie

Activity: 39

Merit: 0

Quote from: SchizophrenicX on June 11, 2011, 02:42:05 AM

my money is on GD70. 4~6 cards depending on ur config.

how do you power that?

SchizophrenicX

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Activity: 112

Merit: 100

"I'm not psychic; I'm just damn good"

my money is on GD70. 4~6 cards depending on ur config.

jonnynogood

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its a 100% mining rig i could care less all i am after is Mh/sec

computerparts

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Quote from: mouser98 on June 10, 2011, 10:47:49 PM

Quote from: computerparts on June 10, 2011, 10:42:05 PM

Quote from: mouser98 on June 10, 2011, 10:35:07 PM

here is the one that i got with 4 pci-e slots for $65

http://www.newegg.com/Product/Product.aspx?Item=N82E16813138318

That board only has two pci-e slots which can be used with video cards.

lol, tell that to my four 5830s then

If you are using risers on pci-e 1x slots for video cards, then you're killing the bandwidth. Might as well chop the card in half while you're at it.

jonnynogood

newbie

Activity: 39

Merit: 0

Quote from: DupingBitCoins on June 11, 2011, 12:12:31 AM

Quote from: V2-V3 on June 11, 2011, 12:01:36 AM

yes sir it will help keep them much cooler

Your the man :O

they stay very cold like this. i have a homemade aluminum frame 2 level case with these. 2 cards and the power supply on the top level and 2 cards and the motherboard on the bottom level. the bottom cards are plugged into the 16x ports and the top cards are on extenders plugged into the 1x ports. they have about an inch between them and the temps are about 15 degrees colder than when i had them back to back.

the case is a few inches bigger than the motherboard and is about 13-14" tall. basically a cube with fans on the front blowing through

i got my cables from here
https://cablesaurus.com/

you can pay in bitcoins, my order arrived in 3 days and it shipped all the way across the US

V2-V3

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Quote from: DupingBitCoins on June 11, 2011, 12:12:31 AM

Quote from: V2-V3 on June 11, 2011, 12:01:36 AM

yes sir it will help keep them much cooler

Your the man :O

You are very welcome

DupingBitCoins

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Quote from: V2-V3 on June 11, 2011, 12:01:36 AM

yes sir it will help keep them much cooler

Your the man :O

V2-V3

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Merit: 100

yes sir it will help keep them much cooler

DupingBitCoins

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Quote from: V2-V3 on June 10, 2011, 11:52:26 PM

Riser cable available here:
http://www.chinadist.com/pci-e-1x-riser-pci-express-extension-card-cable.html

it allows you to place the card farther away from the motherboard so you can plug more GPU's into a motherboard without the space restrictions between slots where a dual slot card will not fit.

Wow thats awesome :O

That will also keep them cooler right sense they won't be close to eachother??

V2-V3

full member

Activity: 227

Merit: 100

Riser cable available here:
http://www.chinadist.com/pci-e-1x-riser-pci-express-extension-card-cable.html

it allows you to place the card farther away from the motherboard so you can plug more GPU's into a motherboard without the space restrictions between slots where a dual slot card will not fit.

DupingBitCoins

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Activity: 28

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Quote from: jonnynogood on June 10, 2011, 11:33:09 PM

Quote from: DupingBitCoins on June 10, 2011, 09:05:58 PM

Trying to find a decent one but not so pricey and with 4 slots for the cards.

i just set this up today with 4 6870 cards

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157198
90 bucks

320 bucks for everything but the cards (850w gold power supply)

you need 2 riser cables and some kind of case but its cheap

What are riser cables exactly? I've never used them, got a link where I can buy? Why do I need them in the first place, and is it just for that CPU? I also only see two slots.. o.O

jonnynogood

newbie

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Quote from: DupingBitCoins on June 10, 2011, 09:05:58 PM

Trying to find a decent one but not so pricey and with 4 slots for the cards.

i just set this up today with 4 6870 cards

http://www.newegg.com/Product/Product.aspx?Item=N82E16813157198
90 bucks

320 bucks for everything but the cards (850w gold power supply)

you need 2 riser cables and some kind of case but its cheap

AndyRossy

sr. member

Activity: 448

Merit: 250

Great much thanks for the reply & advice!

Im currently setting up a 3 x 6950 rig - waiting on PCIx1 risers. Im hoping that, assuming I set them nicely spaced in the case, air cooling should still just about work. If not, $700 hit incoming

.

LeonGeeste

newbie

Activity: 48

Merit: 0

Quote from: AndyRossy on June 10, 2011, 10:30:28 PM

Did you actually run it on air for any period? How long until it overheated? Was it with stock coolers?

I tried running the four of them on air. Bad idea. Once you start hashing, the hottest one, within about 15 seconds, exceeds 90 C and just keeps getting hotter. So for a while I just ran two, and they'd still get hot, with the hotter one at about 85 C. And that's of course without overclocking.; Once I set up the liquid cooling with overclock, I could do four and keep them at about 65 C.

And yes, it's expensive, but the system has more than paid for itself, even ignoring the resale value of the system.

LeonGeeste

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Quote from: smell on June 10, 2011, 10:23:38 PM

Quote from: LeonGeeste on June 10, 2011, 09:39:54 PM

I've bolded the watercooling-specific items, which together sum to $714 (not including shipping).

OUCH

Is it quiet? I hope it's quiet.

Yep, it's quiet.

Skunkworks

newbie

Activity: 28

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Quote from: phenom on June 10, 2011, 09:24:02 PM

This one has 6 PCI-E slots Shocked

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274&Tpk=MSI%20890FXA-GD70%20890FX

Question: can either windows or linux support this many GPUs, and does the BIOS?

If the answer is yes, I can 6x 5770 being very practical in this setup.

Topic: Could someone recommend me a motherboard for 4 cards? (Read 6090 times)