Bitcoin Forum

Mother board like this:

P6T6 WS Revolution
http://compare.ebay.com/like/300551783132?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y

P6T7 WS SuperComputer
http://www.algogo.com/store/products/ASUS-P6T7-WS-X58-ICH10R-nForce200-SUPERCOMPUTER-i7-DDR3-MOTHERBOARD.html

If install 6 -7 graphic card like 5870 / 5830 on 1 mother board ( with big fan cooling system )

Will it work?

Thanks

You could do 6 cards by using PCI-E extenders. Just a warning though you run the risk of exploding the motherboard if you run 6 5870s, as the PCI-E bus still delivers power to cards despite having external power connectors. I don't know the exact numbers, the spec calls for 75W max, so say 40 * 6 = 240W running through the PCIE Bus.

Of note, a $200 motherboard that requires a $200+ CPU isn't necessarily that money saving. You can find cheap AMD AM3 boards with 5 PCI-slots (x1 works fine) for ~$120 with a $40 sempron that saves you > $250.

In fact you could get 2x $120 mobos + 2x $40 CPUs, have 10 slots for cards and still have spent less than you would have on LGA1366.

what kind of AMD AM3 boards have 5 PCI-E slots which could install a graphic card?

Gigabyte GD70. get extender cable for 1 or 2 of the PCIe. and theres still PCI-E to spare if u have adapter.

something like this?  how many graphic card does it support?

And what is extender cable or adapter?


http://b201.photo.store.qq.com/http_imgload.cgi?/rurl4_b=eb54bf65e56cd3c07ab508cbfe65ea93842f67768a2e0eb175ebd2c76690dd393a08ec5428432b010181e0f83e94354458ea2f7e6b07c3d2b4c7a49cd48a2e8596d1ae2e963d26322365db07caff5c90dcba9edb&a=205&b=201

I assume you don't put these setup in an actual case?

I list some of the resources that you may be interested in while planning your mining rig in my Building "guide" including this (http://forum.bitcoin.org/index.php?topic=6128.0).

Also, I think it isn't that difficult to find specification on the GD-70 (http://www.newegg.com/Product/Product.aspx?Item=N82E16813130274&cm_re=GD70-_-13-130-274-_-Product), take heed that,as darvil, I also assume you're not putting them in a case, and you probably have to solve the PSU problem (as I had to initially which I didn't and gave up) if you put so many GPU on on MOBO. (Max PSU prolly around 1500 W, you'll need more than that)

I tried running with 6 HD5870 on a single MB but I could only get 4 out of the 6 to work properly, XFX couldn't see any reason why but figured it was down to resource problems with the MB - I've since changed to use 3xHD5870 per MB.

ChrisB.

Were you crossfiring the cards? Or in Windows XP 32bit (I think). Crossfire is forced to 4 GPUs max. One version of windows is reported to also have that limitation.


As for PSU problem, 6 5870s can run comfortably on a 1200W with no worries. The biggest worry is still as I said frying the motherboard by running so much power through it.

If you have more than 4 GPUS you need to run linux, windows cant use more than 4

also by the time you buy one of those motherboards and a 1366 processor, your probably wasting money over buying two smaller rigs

What motherboard are you using?

Whatever POS that came with the an Dell SC440.


No crossfire, running under Ubuntu.


I'd also advise thinking about how you're going to get power to the 6pins.

ChrisB.

Theres another issue that is the PCIe slots actually powers the card like up to 70+ watts maybe the MOBO couldn't handle that much power request or something (similar to what was mention)

windows limits you to 4 gpus per motherboard?