Daystar Technology has released a new flat panel iMac upgrade that boosts the computeris speed to 1.35GHz, which the company said delivers roughly twice the performance for owners of 700MHz systems. The processor includes a 512MB L2 cache, twice what the original processor had, and XLR8 MAChSpeed Control software, which optimizes performance. Pricing is US$548. Users need to send their computers to Daystar to have the upgrade installed.