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Author Topic: New Motherboard that can take 4 GPU  (Read 4736 times)
worldinacoin
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October 19, 2011, 10:29:31 AM
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I need a new motherboard that can take 4x 5850.  Trying to get MSI Motherboard 890FXA-GD70 but it is no longer available.  Anyway knows of some other mother board?  My casing is a tower, so those E-ATC motherboard, I won't be able to fit in.
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jamesg
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AKA: gigavps


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October 19, 2011, 10:54:55 AM
 #2

I need a new motherboard that can take 4x 5850.  Trying to get MSI Motherboard 890FXA-GD70 but it is no longer available.  Anyway knows of some other mother board?  My casing is a tower, so those E-ATC motherboard, I won't be able to fit in.

https://bitcointalk.org/index.php?topic=37880.msg472620#msg472620
jjiimm_64
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October 19, 2011, 03:51:57 PM
 #3

I need a new motherboard that can take 4x 5850.  Trying to get MSI Motherboard 890FXA-GD70 but it is no longer available.  Anyway knows of some other mother board?  My casing is a tower, so those E-ATC motherboard, I won't be able to fit in.
I have 10 of these boards, love them

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p5197.m570.l1313&_nkw=msi+gd70&_sacat=See-All-Categories


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worldinacoin
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October 19, 2011, 03:57:16 PM
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You are lucky, I can't find it anywhere, anyway found the MSI Big Bang, anyone tried it before?  8 PCIe x 16 Slots!
jjiimm_64
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October 19, 2011, 04:29:34 PM
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You are lucky, I can't find it anywhere, anyway found the MSI Big Bang, anyone tried it before?  8 PCIe x 16 Slots!

the link I provided sells this board.  can you use ebay?

how about newegg?
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274

this board is still available.

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DeathAndTaxes
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October 19, 2011, 10:58:14 PM
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LOLZ.  AM3 Intel motherboard.   

Not laughing @ your choice (a fine MB) just the clueless ebay sellers.
abracadabra
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October 20, 2011, 01:24:01 AM
 #7

I have 10 Biostar A870U3.
All work flawlessly.  4x5830, 4x5850, 4x5870, 4x6950

worldinacoin
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October 20, 2011, 10:15:48 AM
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Guess I still have tons to learn about GPUs and motherboards, thanks to those experienced miners advice.  Deeply appreciated.
catfish
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October 20, 2011, 10:25:33 AM
 #9

Similarly, I've standardised on the Gigabyte GA-H61M-D2-B3 because it's a nice square micro-ATX design, and has four PCIe slots that *all* work with PCIe x1 -> x16 extenders.

Given the 'shelf rig' structures I'm using, the board and its four cards fit into an approximate cube. So if you can sort cooling, it's a modular approach. Using full ATX cards leaves a large section of logic board with no cards above it (it's hard to get a card above the left-most side (logic board ports facing you) of the board because there's a CPU in the way, and you either need an extra-long PCIe extender, or daisy-chain two of them).

I've not have any problems with my Gigabyte boards, all filled with cards. I've tested everything from 5770, 5830, 5850, 6870 and 6950 - from multiple manufacturers.

The nice thing about the Gigabyte board is that it doesn't assume monster CPUs (i.e. it's not an 'extreme gamer' rig) so the CPU only has a single 4-pin ATX12V connection, and the chipset itself doesn't consume much power. This leaves the lion's share of the PSU output for the GPUs.

I've always been somewhat suspicious of the 'extreme gamer' boards like the Big Bong and other similarly risibly named examples. They're all built to expect some 'extreme gamer' to bolt in an overclocked 6-core 200W crazy beast CPU, and the northbridge is built to run the fastest RAM in vast quantities - the coolers on some of these logic boards' northbridges are like GPU heatsinks of yesteryear...

What I'm getting at is that the 'extreme gamer' logic boards *could* eat a LOT more of your PSU output purely to run itself, whereas a simpler, lower power board, with a nice low-power bottom-end CPU and slower, lower capacity RAM, would leave more of your PSU's rated output for your GPUs.


Anyone know whether this assumption is correct (I can't see how not), and whether the difference in power consumption is actually significant (this is the bit I'm not sure about)?

...so I give in to the rhythm, the click click clack
I'm too wasted to fight back...


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DeathAndTaxes
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Gerald Davis


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October 20, 2011, 06:59:28 PM
 #10

The nice thing about the Gigabyte board is that it doesn't assume monster CPUs (i.e. it's not an 'extreme gamer' rig) so the CPU only has a single 4-pin ATX12V connection, and the chipset itself doesn't consume much power. This leaves the lion's share of the PSU output for the GPUs.

Why is that a good thing?  8-pin = lower current draw = higher efficiency.


Quote
I've always been somewhat suspicious of the 'extreme gamer' boards like the Big Bong and other similarly risibly named examples. They're all built to expect some 'extreme gamer' to bolt in an overclocked 6-core 200W crazy beast CPU, and the northbridge is built to run the fastest RAM in vast quantities - the coolers on some of these logic boards' northbridges are like GPU heatsinks of yesteryear...

Your Gigabyte board is capable of handling 120W TDP CPU.  There is no 1155 socket CPU that uses 200W.  While Gigabyte might not be targeting the extreme user it must still meet Intel requirements and Intel requires an 1155 MB be able to power 120W TDP CPU.   The 1155 socket has no nothbridge and the southbridge doesn't have that high of a power consumption.  Most of that "extreme cooling". is bling bling which sadly does sell.  

Quote
What I'm getting at is that the 'extreme gamer' logic boards *could* eat a LOT more of your PSU output purely to run itself, whereas a simpler, lower power board, with a nice low-power bottom-end CPU and slower, lower capacity RAM, would leave more of your PSU's rated output for your GPUs.

The CPU used doesn't affect the MB power draw.  
Lower capacity RAM doesn't affect power draw unless loaded.
The memory controller is in the CPU and it is capable of 4 slots the board just happens to have two.  No different to the CPU than a board w/ 4 sockets and only 2 are filled.

The reason to get a low end mATX board is to simply reduce costs.  Why buy what you don't need right?  Still I like an 8-pin MB connector especially power hungry GPU.  Otherwise you are driving a lot of current over 2 small wires (2x 12V, 2x ground in 4-pin connector) and that increases power loss.
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