Valve has confirmed that AMD graphics hardware will be included in commercially available Steam Machines next year.

The company recently detailed the specs of its prototype Steam Machines, which only included Nvidia graphics cards.

In a statement to Forbes, Valve said the exclusion of other graphics card manufacturers was not an indication that Steam Machines are Nvidia-only.

“In 2014, there will be Steam Machines commercially available with graphics hardware made by AMD, Nvidia, and Intel,” said Valve’s Doug Lombardi.

“Valve has worked closely together with all three of these companies on optimizing their hardware for SteamOS, and will continue to do so into the foreseeable future.”

AMD also stated that it would be in Valve’s hardware.

“You’ve asked questions around Valve’s recent announcement of SteamOS and Steam Machines – and were wondering if AMD was ‘left out’ from their prototype program,” said the company.

“This couldn’t be further from the truth – AMD is very actively engaged with Valve on these products and campaigns.”

Valve has previously made it clear that any off-the-shelf parts will be able to be substituted into its Steam Machines.