A new standard replacing ATX (Advance Technology Extended) standard. BTX (Balanced Technology Extended) defines how air should flow inside the computer case and hence how the motherboards and power supplies should be constructed. It started in 2004 and in fact was not accepted, probably mainly due to main computer producers (Intel). Motherboard producers ignored new standard so it naturally died.
micro btx motherboards also called uBTX is an advanced an better form of motherboard than micro atx motherboards and it is manufactured by Intel and b stands for better.
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Item. - Mr Sparks
Pico BTX
How To open .btx file
A pico BTX is 10.5"x8" and only supports one or two expansions slots, designed for half-height or riser-card applications. A microBTX is 10.4"x10.5" (264x267mm) and it supports up to four expansion slots.
BTX
The three form factors for desktop system boards are: ATX, and BTX and NLX
The three versions are; Micro, Nano and Pico
BTX motherboards use a 24-pin power connector.
The main difference between ATX and BTX, is that BTX rearranges components on the ATX board to improve thermodynamics. Components changed that reduced the heat production within a PC, negating the need for the switch to the BTX board.
BTX