The AMD Athlon 64 X2 6400+ BE was a desktop processor with 2 cores, launched in August 2007. It is part of the Athlon 64 X2 lineup, using the Windsor architecture with Socket AM2. Athlon 64 X2 6400+ BE has 1 MB of L2 cache and operates at 3.2 GHz. AMD is building the Athlon 64 X2 6400+ BE on a 90 nm production process using 227 million transistors. You may freely adjust the unlocked multiplier on Athlon 64 X2 6400+ BE, which simplifies overclocking greatly, as you can easily dial in any overclocking frequency.
With a TDP of 125 W, the Athlon 64 X2 6400+ BE consumes a lot of power, so good cooling is definitely needed. For communication with other components in the computer, Athlon 64 X2 6400+ BE 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.
The SSE4 instruction set is not supported, which can cause problems with modern games, as they require that capability. Hardware virtualization is available on the Athlon 64 X2 6400+ BE, which greatly improves virtual machine performance.