Documentation at http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Storage.html says
This storage type can deliver single-digit millisecond latencies, with a base performance of 3 IOPS/GB and the ability to burst to 3,000 IOPS for extended periods of time.
Assuming that I'm using a m3.2xlarge (largest currently possible), if I provision more than 1000G, will the instance get a baseline performance of more than 3000 IOPS or will the instance be capped at 3000? For example, if I provision 4000G, will the baseline be 12,000 IOPS? Note that my question is for general purpose SSD not PIOPS.