Unisys phasing out decades-old mainframe processor for x86 chips

Unisys is shifting to Intel's Xeon chips for its flagship servers

By , IDG News Service |  Hardware, Servers

Unisys is phasing out its decades-old mainframe processor, which lags behind in speed and scalability compared to newer chips.

The chip is used in some of Unisys' ClearPath flagship mainframes, but the company is moving to Intel's x86 chips in Libra and Dorado servers in the ClearPath line, it said Tuesday. Unisys also announced 12 high-end servers with Intel's Xeon server chip E5-2600 v2 chip, leaving its proprietary mainframe processor out of the mix. The servers are aimed at Unisys customers in running legacy applications in financial services, telecommunications and transportation markets.

The aging CMOS chip will be "sunsetted" in Libra servers by the end of August and in the Dorado line by the end of 2015, said Unisys spokesman Brian Daly. Dorado 880E and 890E mainframes will use the CMOS chip until the servers are phased out, which is set to happen by the end of 2015.

"It has not gone away yet because we haven't surpassed the performance characteristics," said Brian Herkalo, director of ClearPath portfolio management at Unisys, regarding the CMOS chip.

x86 processors are faster and more power efficient, which makes them a more attractive option, Herkalo said. They are also compatible with the latest components and interconnects, and common hardware infrastructure makes it easier for new Libra and Dorado servers to talk to systems based on Windows and Linux in data centers, Herkalo said.

The switch to x86 processors won't affect existing Unisys customers looking to upgrade older mainframes with faster systems. x86 Dorado servers will continue to support the ClearPath OS 2200 operating system, while the Libra line will support the ClearPath MCP operating system. Both the OSes will execute tasks on Intel's Xeon server chips through a firmware layer that translates the OS code for execution on x86 chips.

As Intel comes out with new processor technologies, ClearPath servers will get faster, Herkalo said. x86 architecture also allows Unisys to use many of the latest technologies to boost security and increase throughput among a network of servers in data centers.

The fastest Libra 8300 server scales to 9,000 million instructions per second, compared to 5,800 million instructions per second with its highest-performing server with the proprietary mainframe processor.

"We're seeing the same gains on the Dorado side," Herkalo said.

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