Tripple 6990s Minning Help Request | Bitcointalksearch.org

TheShoura

member

Activity: 98

Merit: 10

Testing

Quote from: c-rock on May 12, 2011, 02:06:21 PM

I been having trouble with one of my 6990s. I can only see three of the GPUs. I have crossed fired, etc. It keeps on saying to dual connect crossfire, but there is only one crossfire slots on each of the cards.

I have tried a bunch of stuff.
Running Win 7 64 bit, with catalyst 11.4 and Latest SDK.
Part of me wants to RMA it, but with coin prices so high, its tough to send it back. even with three GPUs, its running about 1.1 Ghash at 841 MHZ.

Did you put dummy plug on each card?

c-rock

member

Activity: 60

Merit: 10

I love the Cloud, and Love Mining, how 2 combine?

I been having trouble with one of my 6990s. I can only see three of the GPUs. I have crossed fired, etc. It keeps on saying to dual connect crossfire, but there is only one crossfire slots on each of the cards.

I have tried a bunch of stuff.
Running Win 7 64 bit, with catalyst 11.4 and Latest SDK.
Part of me wants to RMA it, but with coin prices so high, its tough to send it back. even with three GPUs, its running about 1.1 Ghash at 841 MHZ.

bitcoindaddy

hero member

Activity: 481

Merit: 500

What are you going to use for a power supply? Three cards will take about 1200 Watts, then add more for the CPU, memory, etc.

EPiSKiNG

legendary

Activity: 800

Merit: 1001

Quote from: BitcoinRigs.com on May 12, 2011, 11:15:11 AM

Quote from: bbcoiner on May 11, 2011, 07:44:06 PM

Is it possible to mine with tripple 6990s? AMD drivers do not normally support tripple crossfire 6990s. Is there a way around this?

Thanks

Ubuntu 10.10, Catalyst 11.5, SDK 2.4. Like this:

What case is that?

BitcoinRigs.com

member

Activity: 68

Merit: 10

Quote from: bbcoiner on May 11, 2011, 07:44:06 PM

Is it possible to mine with tripple 6990s? AMD drivers do not normally support tripple crossfire 6990s. Is there a way around this?

Thanks

Ubuntu 10.10, Catalyst 11.5, SDK 2.4. Like this:

gusta

newbie

Activity: 8

Merit: 0

Linux supports upto 8 gpu

bbcoiner

newbie

Activity: 2

Merit: 0

Quote from: grue on May 11, 2011, 07:45:02 PM

If you're using windows, you can only use 4 cores. also, don't use crossfire, it actually degrades performance.

Is it possible under linux?

TheShoura

member

Activity: 98

Merit: 10

Testing

Windows based OpenCL seems to bug out if you add more than 3 GPUs

That is, until you enable Crossfire. I enabled Crossfire and I got 4 GPUs to work. You _WILL_ have to enable Crossfire to get more than 4 GPU to work.

IDK if 6 will work.. rumor has it, 4 was the max. Give it a shot with Crossfire though. It does not degrade performance anymore. My 6870's do 260Mh/s each with or without crossfire.

clonedone

full member

Activity: 350

Merit: 100

Quote from: grue on May 11, 2011, 07:45:02 PM

If you're using windows, you can only use 4 cores. also, don't use crossfire, it actually degrades performance.

crossfire is the only way to use two 6990s, if you dont, it wont work for some reason

grue

legendary

Activity: 2058

Merit: 1462

If you're using windows, you can only use 4 cores. also, don't use crossfire, it actually degrades performance.

bbcoiner

newbie

Activity: 2

Merit: 0

Is it possible to mine with tripple 6990s? AMD drivers do not normally support tripple crossfire 6990s. Is there a way around this?

Thanks

Topic: Tripple 6990s Minning Help Request (Read 2371 times)