Yup. Major increase IF I turn off synchronisation (with synchronization on, there was a net loss of frames in comparison to running a single GPU), but there doesn't seem to be the horrible stuttering issue I had before when I tried to play with synchronization off. (perhaps because frames are now high enough to compensate for the synchronization problem?)
Only other factor might be I noticed multi-core support was enabled in the profile provided above.
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-AKD
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