Thermalright today rolled out the True Spirit 90M Rev B CPU cooler. A major update to the True Spirit 90M Rev A from 2013, the Rev B comes with four 6 mm-thick heat-pipes instead of three. The aluminium fin-stack pushed slightly further to the left and top to free up more clearance near the motherboard's memory area and the M.2 slot closest to the CPU socket. It also has an updated aesthetic (different fan colors). Support is added for some of the newer CPU sockets, such as AM4.

Interestingly, the thermal load capacity between the two revisions remains unchanged at 120 Watts. Measuring 102 mm x 50 mm x 125 mm (WxDxH), the cooler weighs 365 g, which is in fact 22 g lighter than the Rev A. The fan takes in 4-pin PWM input, spins between 800 to 2,000 RPM, and pushes up to 39.36 CFM of air, with a noise output of 27 dBA. The True Spirit 90M Rev B replaces the Rev A at its $29 price.