The AMD Phenom II X4 840T was a desktop processor with 4 cores, launched in September 2010. It is part of the Phenom II X4 lineup, using the Zosma architecture with Socket AM3. Phenom II X4 840T has 6 MB of L3 cache and operates at 2.9 GHz by default, but can boost up to 3.2 GHz, depending on the workload. AMD is building the Phenom II X4 840T on a 45 nm production process using 904 million transistors. The silicon die of the chip is not fabricated at AMD, but at the foundry of GlobalFoundries. The multiplier is locked on Phenom II X4 840T, which limits its overclocking capabilities.
With a TDP of 95 W, the Phenom II X4 840T consumes a good deal of power, so decent cooling is needed. AMD's processor supports DDR2 and DDR3 memory with a dual-channel interface. The highest officially supported memory speed is 1333 MT/s, but with overclocking (and the right memory modules) you can go even higher. For communication with other components in the system, Phenom II X4 840T 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 Phenom II X4 840T, which greatly improves virtual machine performance.