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Interesting post confirming the 8 GPU limit is only related to the Windows AMD driver, this poster has 4x Radeon 7990 plus 2x NVIDIA cards = total 10 GPUs under Windows
https://bitcointalk.org/index.php?topic=...msg9069444
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4x 7990 is 8 GPUs. That's the maximum the AMD driver supports. Not sure what you're not understanding about that.
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I was just sharing an interesting setup... no need to be so aggressive.
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Quick update: I've been running 4x 7990s on the ASUS Z97-WS successfully. This board won't boot with 5x 7990.
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This board won't boot with 5x 7990. oh jezuz pleaze...............
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5x 7990 is 10 GPUs, and the AMD driver only supports 8. So even if it did boot, it wouldn't work.