Samsung Electronics is trying to keep computer-graphics chips from Nvidia Corp. from reaching the market in the latest tech beef.

The battle started this past September when Nvidia filed a complaint with the U.S. International Trade Commission against Qualcomm Inc. and Samsung over patents, asking the agency to stop imports of Galaxy phones and tablets that run off Qualcomm’s Snapdragon graphics processing units, or Samsung’s Exynos processors, according to Bloomberg.

Yesterday, Samsung struck back with a complaint against Nvidia, which was revealed in a notice on the ITC’s website, although the complaint itself wasn’t immediately available.

Samsung filed a patent-infringement suit Nov. 4 against Nvidia, alleging that the company and one of its customers are infringing on eight patents, specifically targeting Nvidia’s Shield tablet computers.

Both companies are denying that they are using each other’s technology, and Nvidia sneered at Samsung’s efforts as “a predictable tactic” in a Nov. 11 statement.

An Nvidia spokesperson declined to comment due to not seeing the complaint, but noted that the company will “look forward to pursuing our earlier filed ITC action against Samsung products,” according to te Bloomberg report.

Computer parts manufacturers Biostar Microtech International Corp. and Elitegroup Computer Systems Co. were also named in the ITC complaint.

Graphics processing units are becoming a legal battleground as smartphones and tablet computers increasingly rely on them to handle gaming and movies, an exploding market that manufacturers are trying to fill.

This particular case is titled In the Matter of Certain Graphics Processing Chips, Systems on a Chip, Complaint No. 3042. The Nvidia case was listed as In the Matter of Certain Consumer Electronics and Display Devices with Graphics Processing and Graphics Processing Units, 337-932.