The European Commission has come to terms with Rambus, which has pledged to put a cap on the royalties it charges for its DRAM patents in exchange for the regulator dropping its monopoly abuse investigation without a fine. Rambus currently charges 3.5%. From now on royalties on earlier chip standards will go to zilch and later ones just 1.5%, according to the Wall Street Journal. Rambus has spent a lot on lawyer to persuade regulators on both sides of the pond it didn’t commit patent ambush by getting its IP written into standards without disclosing it held the royalty-bearing patents.