Dell PowerEdge servers were designed to be scalable as well as affordable. There are PowerEdge blade, rack and tower servers. The tower servers are for businesses using up to three processors, the rack is for businesses using four or more, and the blade is for the most demanding environments. The 2U PowerEdge 2650 is a larger-memory and faster-processing unit that can be integrated into clusters.The PowerEdge 830 is an entry-level server that comes in base, enhanced and advanced models. The base model has a single Intel Celeron processor, the enhanced version has a second drive so that there is room to expand, and the advanced version has a third hard drive. The PowerEdge SC1420 is another server for small businesses up of to 50 employees. This server has an advanced version that features a third hard drive, two 3.2GHz Intel Xeon processors, and 2.0GB of memory.The Dell PowerEdge 2800 is a dual-core, 2.8GHz machine that can operate with two 64-bit Xeon processors. Dual-core technology means that, within one processor chip, you can have the power of two processors. This is a tower server that is designed especially for small business, and it offers the ability to quickly access internal components. There is also an LCD display that lets you know the status of the server, making maintenance easier. The 4U PowerEdge 6650 and the 4U PowerEdge 6850, as well as the iSeries, are all high-powered servers with heavy data transfer capabilities in mind.The PowerEdge 1855 holds up to 10 blade servers, and has a maximum input power of 4437W. There are six Ethernet uplinks and a product power configuration calculator. The blade servers themselves have up to 16GB of memory and six DIMM slots.