I told my mother about my mining Primecoins and she decided to run the miner on her phenom II x4 - it's doing surprisingly well mining - she's getting around 4k pps and 8-10 cpm - around half of what my 3930k is getting right now. The main client might work well for an 1100t - It would be amazing if the Bulldozer client was better though - Only way we can find out is testing it, and I don't want to spend the time dealing with some other version of the client right now. It might be worth a shot testing it now.