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Author Topic: Crossfire for mining?  (Read 1736 times)
aceman1011
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May 27, 2011, 08:02:09 PM
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I am new to mining and am building my first rig. I have chosen the Radeon 5830 card for its low price and high hashrate, and was wondering if I could effectively double the hashrate by connecting two cards using crossfire connectors. Would this lower the performance compared to using to separate PCI slots on the motherboard? Thanks!

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ataranlen
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May 27, 2011, 08:05:39 PM
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You would still need to use separate PCI-e slots on the motherboard and separate PCI-e power connectors. Crossfire does decrease performance, but it works without Dummy plugs. Take your pick Grin

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May 27, 2011, 08:09:15 PM
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Crossfire decreases performance.
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May 27, 2011, 08:10:04 PM
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Crossfire decreases performance.

Not by a whole lot though, for me, The decrease was about 1%

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aceman1011
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May 27, 2011, 08:51:34 PM
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Alright, thanks guys.

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BitCointransfers
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May 27, 2011, 09:05:19 PM
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I run 4x5830 Sapphires with no dummy load on the video connectors and it works fine..... Ubuntu 11.04....
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May 27, 2011, 09:43:51 PM
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Crossfire decreases performance.

Not by a whole lot though, for me, The decrease was about 1%

i have massive losses when using crossfire and mining with 6950's. Mining speed keeps varying between 200-430 on my cards instead of beeing stable at 430 with crossfire off.
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May 27, 2011, 09:45:36 PM
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I run 4x5830 Sapphires with no dummy load on the video connectors and it works fine..... Ubuntu 11.04....

The dummy plug is only needed on Windows, not Linux.
aceman1011
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May 30, 2011, 03:14:28 PM
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Lol, Crossfire and dummy plugs don't matter in Linux. This would be on Windows XP though. From the replies I'm just going to turn CF off and use dummy plugs.

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