If you're still unsure about the exact benefits provided by a quad core CPU, we suggest you study up, because desktop CPUs are poised to become even more complicated. By launching the 890GX chipset for high-end desktop motherboards today, AMD has laid the groundwork for a forthcoming six-core desktop CPU (code-named "Thuban"), due out later this year.
The new 890GX chipset will support all of the desktop chips in AMD's Socket AM3 CPU family, which includes the Phenom II X4 and X3, as well as newer Athlon II X4, X3, and X2 chips. AMD itself doesn't make the actual motherboards based on the 890GX, but partners such as Asus, Gigabyte, MSI, and others all have 890GX-based motherboards available at retail, for around $150.
HotHardware, Anandtech, PC Perspective, and HardOCP all have reviews or previews of 890GX motherboards that dig down on some of the more technical details. Among the new features aimed at enthusiasts, AMD has incorporated support for USB 3.0, SATA 6Gbps, as well as multiple full bandwidth 16x PCI Express 2.0 graphics card slots.