Dell on Monday, unveiled its blade server portfolio saying that the latest M-series has low power consumption and is deemed efficient.

Dells said the blade server consumes 19 percent less energy compared with HP system and delivers up to 28 percent more power watt than rival products from IBM.

The blades can be equipped with two processors, up to 32 GB of memory and two hard drives , but the software options include Microsoft's Windows Server 2003 R2, Red Hat EL, Suse EL and VMWare VI.

Dell also started offering its customers a program that allows simple upgrade of blade server system and promised that this approach will enable companies to efficiently design a networked blade environment that best meets their infrastructure requirements.

The program also allows addition and modification of network stacking and uplink capabilities such as technology or business needs change at a low cost, said Dell.

The new blade servers will cost $2000 with top models Intel and AMD approaching $12,000 excluding the operating system.