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I don't see many cards that have even four PCIE slots, but I am hearing some people put up to six on a single board! How is this possible? Which boards will work? Thanks!  ???

This is what you need. http://uk.msi.com/product/mb/Z77A-GD65.html (http://uk.msi.com/product/mb/Z77A-GD65.html)

You can have 7 GPUs in this one.

http://content.hwigroup.net/images/products/xl/150192.jpg

Yep, i have one of those .... just not with 7 GPU's fitted!

Can this motherboard work with window?

Yes it works with Windows (you'll be hard pushed to find a mobo which won't)

Yes it will accept 7 GPUs (like many many other mobos with 7 PCI-E slots)

Yes, they will all overheat because they're too close together (buy yourself powered PCI-E risers for all the cards and find a way of giving them more space)

Don't forget about power - you'll need a behemoth of a PSU to run 7 GPUs.

Like pletharoe says, although it supports 7 cards, I wouldn't recommend sticking 7 in unless you want to start a fire. You really need to get into advanced cooling techniques if you want to run 7 cards from one motherboard.

One other reason for spreading your GPUs over several motherboards is for diversity of your mining power.

If you have all your GPUs in one board and it fails you have lost 100% of the mining capability.

Have the same GPUs spread over 3 motheboards and loose one motherboard, you still have 66.6% of your mining capability running, bringing in an income while you make repairs to the broken rig.

Also looking for a motherboard.
But I'm fine with running 4, And would like recomend's on a cheap gpu/cpu eaily found on ebay for example. As I plan to order a couple.

I like having spares!

The MSI 990FXA-GD65V2 supports 6 GPU, and has dedicated power plug for powering pci-e slots. No more burned ATX power connector. Getting all 6 GPU to mine is the responsibility of the OS and drivers.

and ... how many GHS will this do?

6 gpu at 700 = 0.0042 GHS or did you mean 4200 MHS?

Motherboard does not do hashes... That's based of number and model of your GPU :)

Run more rigs with less cards. Trust me, much easier and more efficient. Those who say different have not done both.

Certainly much easier and less likely to blow up. Whether more efficient is open to debate. Motherboards costs money.

Does anyone have a name for a mobo that works well, 4 pci, sub $100 range with a cheap cpu option?

Seems a waste to buy 7 pci slot's if I may never use them :)

I don't think you need 4 PCIe, just 4 total GPU slots possibly if you are using risers, so maybe asrock extreme 3 ? I am defintiely not sure about this, but check it out.

Yeah, that mobo is certainly overspecced for the job, overspecced for almost any job. There are many much cheaper motherboards that will take 4 graphic cards. http://www.msi.com/ is one producer, there are several others. Sure someone here owns a sub-$100 borad that does the job?

I'm sure there's plenty. But loikinng for one someone has used. Hate to grab one with issues.

this one will manager 5 cards without power risers with 2 x 1kwt psu ?
(r9 290)
MSI FM2-A85XA-G43

How much is that roughly?

is MSI the only viable brand? What about gigabytes? Are the small PCI slots (not the pci-express) usable for these cards?

$138.84 (inc US delivery)

http://www.amazon.com/gp/product/B00DYSD8R2/ref=as_li_ (http://www.amazon.com/gp/product/B00DYSD8R2/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00DYSD8R2&linkCode=as2&tag=minebitcoins-20)

The 1xPCI-e little slots need an adaptor to fit a 16x card, use one like this one on ebay use the ebay powered ones in the post below
http://www.ebay.com/itm/PCI-E-Extension-Cable-1X-To-16X-Riser-Extender-Card (http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575000824&toolid=10001&campid=5337404517&customid=&icep_item=171201091467&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg)


Or hack the card to fit the slot and short some pins to identify the card as a 1x slot version
http://lifehacker.com/5951156/convert-a-pci+e-x16-video-card-to-fit-a-x1-slot-with-a-diamond-cutting-wheel (http://lifehacker.com/5951156/convert-a-pci+e-x16-video-card-to-fit-a-x1-slot-with-a-diamond-cutting-wheel)


as for gigabyte, try http://www.amazon.com/gp/product/B00518M74I/ref=as_li (http://www.amazon.com/gp/product/B00518M74I/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00518M74I&linkCode=as2&tag=minebitcoins-20) for the Gigabyte Z68X-UD3H-B3 Motherboard

http://i41.tinypic.com/2it29ua.jpg

You can use all the slots EXCEPT the two arrowed (PCI) as they only run at 33MHz which is useless for a GPU.

http://lmgtfy.com/?q=MSI+FM2-A85XA-G43

Unpowered riser's really? hmmm

Sorry, my bad. Don't use unpowered risers for GPUs
http://www.ebay.com/itm/PCI-E-16X-to-1X-Adapter-Riser-Card-Flex-Extension-Cable-w-Molex-Power (http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575000824&toolid=10001&campid=5337404517&customid=&icep_item=181285248039&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg)


lmgtfy.com still makes me smile  :D

I hate questions like that, lol.
Suggestions on the best FM@ AMD CPU for that mobo? seen some cheap 3.2Ghs dual core's, would that suffice the rig?

lmgtfy.com still makes me smile  :D

I would go for cheapest processor that's compatible, you don't need fire breathing processors for mining. That way you will ROI more quickly. But resale value is always a consideration unless you mine it to death  :(


http://www.msi.com/product/mb/FM2-A85XA-G43.html#/?div=CPUSupport (http://www.msi.com/product/mb/FM2-A85XA-G43.html#/?div=CPUSupport)


The 340X Athlon X2 FM2 (Trinity) versions should be on the cheap side
http://www.ebay.com/sch/i.html?_from=R40&_sacat=0&_nkw=fm2 athlon amd x2 (http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=9&pub=5575000824&toolid=10001&campid=5337431622&customid=&icep_uq=fm2+athlon+amd+x2&icep_sellerId=&icep_ex_kw=&icep_sortBy=12&icep_catId=&icep_minPrice=&icep_maxPrice=&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg)

I am in Thailand and there is a very limited supply of motherboards available here, I don't know anywhere that ships here. I am looking for a motherboard and processor; I have all the other parts, but they are just sitting around! Will
GB Z87-D3HP (Intel 1150) http://www.gigabyte.com/products/product-page.aspx?pid=4519#ov
be a decent choice? I don't have many other options; they seem to lack AMD boards here. Asrock Extreme 3 is available but I think it would only support 3 GPUs, is that right?  What intel processor would be decent?

Isn't asrock extreme4 970 good? I'm gonna buy that. How many gpu's can fit on that?

I bought MSI in Panthip Plaza in Bangkok ......

I am in Chiang Mai, jedicool is ignoring me and invadeit is out of stock :(
I think ASrock extreme 4 is one of the best mining boards, AFAIK. I don't know which of the ones available here are decent though.

Soon im going to buy either the Z87 G55 or the Z87 G45 Gaming from MSI.
Both boards are identical, except the latter has a different color scheme, is a tad more expensive and has better audio, all which shouldn't matter for mining. No extra accessories except the gaming one has a door hanger, and thats about it.
Has 3x full size and 4x x1 sized PCIE, wihch im thinking of filling with 7 of R9 290s.
And yes you should ue powered risers for x1 sized ones (smallest) but idk about the x16 ones, you might not need to.

Watch out for R290 cards compatibility with different motherboards. I have 2 brand new MB's that will not run the R290 (Sapphire) with setting that generate > 400 kHash. One is Gigabyte Intel based Z87X-OC - the other is an Asrock 970 Extreme 4 AMD based. I tried all R290 (Sapphire x 2, ASUS, MSI, Gigabyte) firmware combo's before I gave up and plugged it into a ASUS X79 based board where each run at 880-900 kHash. And that was even without any risers and only 1 card in different PCI-E slots (yes tried every combo to get that crap working)

So I would recommend getting a full right of return on the board if it wont run.  My 7970 Rig runs fine on the above MB's without hardware failures.

here are my Sapphire R290 BFG settings for 880-900 k - "--worksize 256 --lookup-gap 2 -I 20 -g 1 --thread-concurrency 32765 --gpu-engine 1000 --gpu-memclock 1250-1500 --temp-target 83 --auto-fan --gpu-fan 25-100 --gpu-powertune 20 --temp-overheat 95"

Rig runs stable with max temperature of 83 - usually about 81/82. Fan speed around 70-80% average in 24 Deg C room.

Ah .... much less selection in Chiang Mai for sure. You've been round the Panthip Plaza there presumably? I know its very small comparitively but there are several shops that sell "gaming hardware" - one might do MSI boards.