picked up an SP3 and ran a speed comparison vs. my SP2. task is heavy computation, using the Stata statistical package to crunch a database. lots of loading files, processing them in memory with string replacement and the like. I clicked "go" at the same moment. SP3 finished in 2 minutes 54 seconds, whereas the SP2 did not finish until 6 minutes 3 seconds. that's more than twice as long. TWICE. I'm shocked. note: my SP2 has the i5-4200 CPU.