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... Unlike its siblings, the X38 will contain PCI Express 2.0 technology - in the form of two PCIe x16 slots for a pair of co-operating graphics cards - and what Intel calls Performance Auto-tuning, a way of dynamically overclocking the processor and system components.
As past leaks have revealed, the X38 will support a 1333MHz frontside bus speed and connect to DDR 3 memory clocked also at 1333MHz.