Ignoring creative liberties, it is assumed silicone based life forms would need high temps to thrive. Is quite possible that they would immediately die if exposed to human temps. Possibly these high temps would result in very fast computational skills.
Is interesting though. The speed at which you think is not entirely related to intelligence. If you created a computer the size of the solar system, it would be far far far more intelligent than an individual human. But because information would take hours to traverse across different regions of that brain, conversations and answers to questions might be incredible slow to come. We actually already take this into consideration when designing computers. The physical length memory is from the CPU is now critical.