Virident, the secretive Los Altos, Calif. company building a hardware that makes computers more energy efficient confirmed it has raised $13.3 million in a first round of funding, something we reported in May.

At the time, we didn’t know much — only that backers included Artiman Ventures and Spansion LLC.

VentureWire (subscription required) has more details today: Artiman Ventures led the round with $2 million from Artiman Ventures, Spansion participated and the Parekh Family Trust and the Ganapathy-Kumar Revocable Living Trust also joined in.

Here’s VentureWire:

The Milpitas, Calif-based company is developing a technology to improve computer energy efficiency. The technology would be focused on computers in Internet data centers and Glazier said the company would hope to partner with companies like Dell, Hewlett-Packard and IBM.

“Companies like Google build a large presence in data centers and buy small, very hot computers,” Glazier said. “If you could build a computer that uses less power there will be a very big market for that.”