The low-power capabilities of ARM-based processors have created high expectations for their use in servers, but one of Dell’s top engineers said they are unlikely to take off until 64-bit versions hit the market.

“I don’t think you’ll see any serious momentum in ARM until 64-bit comes out,” said Jimmy Pike, vice president, senior fellow and chief architect of Dell’s Data Center Solutions division. ARM has said it expects 64-bit server chips based on its processor design to start shipping next year, with servers shipping in volume starting in late 2014 or early 2015. Pike is highly regarded in low-power server design and the Dell division he’s in was among the first of the top-tier server providers to experiment with very low-power servers for hyperscale data centers.

ARM processors are being used in most smartphones and tablets, but are being investigated for use in servers as a way to cut electric bills while efficiently processing large volumes of Internet transactions. To counter ARM, Intel is offering Atom server processors as low-power alternatives to its power-hungry Xeon server chips, which dominate the data center landscape today.

But Intel has an early advantage over ARM. Hewlett-Packard last week announced its Project Moonshot dense server with Intel’s Atom processor and Dell is already offering dense servers with low-power x86 chips. The companies are relegating ARM servers to the labs, where they are offered to customers for testing.

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