Indeed,IPC will probably increase with Bulldozer core but not by much- think 10% in int and similar for FP (without recompile). With Llano we had a >6% (AT measured up to 14% and as low as 3%), just by some smaller tweaks and upping the L2 cache size to 1MB. With BD ,we have a whole new L2 cache that is now shared,we have some massive pipeline changes (to allow higher clock) and we have some major uarchitectural improvements in instruction fecth,decode,branch prediction and last but not least prefetching.All these are a big step up and will offset any IPC impact that longer pipeline (or 3rd ALU) might have had on Bulldozer average IPC.