The Intel Core 2 Quad Q9505 was a desktop processor with 4 cores, launched in March 2009. It is part of the Core 2 Quad lineup, using the Yorkfield architecture with Socket 775. Core 2 Quad Q9505 has 6 MB of L2 cache and operates at 2.833 GHz. Intel is making the Core 2 Quad Q9505 on a 45 nm production node using 456 million transistors. The multiplier is locked on Core 2 Quad Q9505, which limits its overclocking potential. With a TDP of 95 W, the Core 2 Quad Q9505 consumes a good deal of power, so decent cooling is needed. Intel's processor supports DDR1, DDR2 and DDR3 memory with a dual-channel interface. For communication with other components in the machine, Core 2 Quad Q9505 uses a PCI-Express Gen 2 connection. Although the processor doesn't come with integrated graphics, certain motherboards with compatible chipsets can provide this capability. Hardware virtualization is available on the Core 2 Quad Q9505, which greatly improves virtual machine performance.