The concern with energy costs and environmental impacts of cloud computing is increasing. Here’s Technology Review an IBM’s new mainframe.

IBM Corp. rolls out a new mainframe computer Tuesday boasting a 50 percent performance boost and dramatically lower energy costs than its predecessor.

The new System z10, with a starting price at about $1 million, comes as IBM focuses on lowering the price tag for running its storied line of data-crunching workhorses.

The Armonk, N.Y.-based company said it designed the new machine to help companies and government agencies that rely on mainframes — usually for critical data processing such as bank transactions or census statistics crunching — save money on energy bills and better handle a flood of Internet information.

IBM says that the new machine was designed to appeal to cost-conscious companies looking to consolidate the number of servers in their data centers.

The z10’s capacity is equivalent to 1,500 servers based on the popular x86 design, IBM says, though it has 85 percent lower energy costs and takes up 85 percent less space than the batch of x86 servers.