A customer has ten RS/6000 Model M80， two pSeries 690 Model 681， five POWER5 510 and two POWER6 560 machines installed and running commercial applications. They want to do a server consolidation study in order to replace the existing systems with POWER7 systems. What performance metric is recommended when evaluating the replacement system？（）

• A、IBM CPW
• B、IBM rPerf
• C、SPECint_rate2006
• D、IDEAS International RPE2