Users can choose between a cash rebate or plug-in rebate, which can be used for purchasing optional plug-ins. Element cards qualify for a $100 cash rebate or a $250 plug-in rebate, PCI cards qualify for a $150 cash rebate or a $300 plug-in rebate, and PCI mkII cards qualify for a $200 cash rebate or a $350 plug-in rebate. The offer is valid through June 2007. www.tcelectronic.com/PowerCoreUpgrade