1.2.2.The BTX standard defines three formats: Standard-BTX: Standard dimensions of 325 x 267 mm; Micro-BTX: Reduced dimensions (264 x 267 mm); Pico-BTX: Extremely compact dimensions (203 x 267 mm)BTX The BTX (Balanced Technology eXtended) format, developed by Intel, is a format designed to improve component arrangement for optimized airflow, acoustic performance, and thermal efficiency.In the BTX format, the replacement of the AGP port by the PCI Express (PCIe) slots is one of the key differences compared to the ATX format.Additionally, the microprocessor is located at the front of the case, near the air intake vents, where the air is coolest.