The HP Compaq dx7300 Microtower PC is designed for customers desiring the latest Intel technology and maximum upgradeability. This PC is created using industry leading Design for Environment standards. Upgradeable, recyclable and energy efficient. Processor :!One of the following: Intel Celeron D Processors Intel Pentium 4 Processors with Hyper Threading Technology Intel Pentium D Processors Intel Core 2 Duo Processors Chipset : Intel® Q965 Express chipset Cache :3.4-GHz, 2x2MB L2 cache, 800-MHz FSB Memory : Supports up to 4-GB of DDR2 SYNCH DRAM. Slot 1 is black and must always be populated. Memory upgrades are accomplished by adding single or multiple DIMMs of the same or varied sizes. The Intel Q965 Express chipsets support non-ECC DDR2 PC2-5300 (667-MHz) and PC2-6400 (800-MHz) memory.