What is your FPS Performance Guarantee? Jim C June 28, 2020 19:15 Updated Follow BLD provides free shipping and returns for systems that do not meet BLD engine performance standards—within 10% of frames per second (FPS). You can read the full FPS guarantee as part of the warranty here. Related articles Why do these FPS numbers seem wrong for some games? If I upgrade my BLD PC gaming system, will it void my warranty? What is covered under the comprehensive parts warranty? How to do a fresh install of Windows 10 Can I Cancel my LetsBLD.com order?