Don't know for sure. As I understand it, as long as they are all the same clock speed, there shouldn't be an issue, but it all comes down to what your vendor BIOS will support.Just because it is possible doesn't mean that they will be supporting it.
Folks, we are shipping Interlagos for revenue right now. If there was a problem we would not be shipping.
Ther overhead for sharing is pretty low. You'll most likely get better results with running on 2 modules, power gating down the other two and taking the higher boost state instead of trying to run one thread per module. Your results might vary, but I would be willing to bet that taking the boost upside is better in the long run.
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