Anyone got 5+ R9 series cards working on 1 mobo?

[LondonLook]

Hi guys,

As the subject says I have bought 6 R9 290's and a mobo with enough PCI-E slots for them.

I hear that drivers 13.x + are needed for the R9 290/x but these dont allow more than 4 cards. Someone here: http://www.gobitgo.com/articles/1002...ne-with-6-GPU/ claims to have done it by installing seperate drivers on the 5th card (but not on R9 290/x)

The 5th card is showing up in windows but wont run in cgMiner (in windows it says it has no driver)

Anyone tried this? I have 4 cards running and todays prices thats about £15 per card so I am reluctant to power it off and start messing trying to get the 5th working.

I know its possible to get 5+ cards mining on 1 mobo but I find no reference to getting this working on the R9 series, can anyone shed any light on this?

I have yet to see anyone running 5 or more R9 series cards on 1 mobo

Regards,
Danny

[peteycamey]

is there a power supply that can handle 5+ R9 ?

[LondonLook]

is there a power supply that can handle 5+ R9 ?

Probably an industrial one but I am using 3 separate ones 1000/850/850  (I have used a paper clip on green to black so they fire up with power)

[wasamata]

we tried it, 5 r9 280x 1 mobo, 2 psu's 850w and 1000w
we were getting 3.5 mh/s but it would crash each half hour or so.
When we removed 1 of the cards all was fine, so figure not enough powersupply.
So I believe you could do it for sure if you have enough power supply.
2000w atleast. each gpu being 400w each so say a 1500 watter running 3 cards and an 850 watt the other 2..
to save troubles we settled on 4 gpus for this rig hashing 3 mh.s, but more than 5 gpus definitely possible on 1 mobo if you have enough powersupply.

[Jollyburner]

I had it stable, but on xubuntu. 2.5 PSUs and 4x powered/ 1x unpowered risers / rig. r9 280xs

[MisO69]

Ya this is easy as pie. I have 6 on all my rigs.


1) you must get your mobo to recognize the cards first. Do this with the presence short. Google that if you dont know what I am talking about.

2) Do a clean install of Windows 8.1, do the microsoft updates. DO NOT USE AMD DRIVERS! use the ones that come with the MSFT updates.

3) Install the AMD app sdk, cgminer

4) Thank me

[hypes]

Ya this is easy as pie. I have 6 on all my rigs.


1) you must get your mobo to recognize the cards first. Do this with the presence short. Google that if you dont know what I am talking about.

2) Do a clean install of Windows 8.1, do the microsoft updates. DO NOT USE AMD DRIVERS! use the ones that come with the MSFT updates.

3) Install the AMD app sdk, cgminer

4) Thank me

Do you only need to do the short if you have 6 cards or do you need to do it if you're using risers?

[MisO69]

You need to short only if you are using risers. Normally you only need to short the 16x PCIe slots when using 1x to 16x risers. Some motherboards work while others do not. If your mobo doesn't detect the cards then the presence short is required.

This does not apply if you are plugging the cards directly into the motherboard.