Each year we look forward to the next big fanless PSU. Seasonic did not disappoint this year, with the new Prime Fanless TX-700. This replaces the Prime Titanium Fanless 600W as the company's most powerful PSU of its kind. Its connectivity is updated to include two 4+4 pin EPS connectors, up to six 6+2 pin PCIe power, and up to twelve SATA power connectors. The best part? It holds onto its >94% 80 Plus Titanium efficiency even at 115VAC. Ripple noise suppression has been tightened to 20 mV, and micro-tolerance load regulation to 0.5%. Seasonic picked the choicest aluminium electrolytic capacitors, and worked on improving the thermals even further. The company backs their design effort with a 12-year warranty.

Seasonic also unveiled the compact 12 cm-long Prime Fanless PX-500 if your requirements aren't too steep. This 500W unit boasts of a respectable 80 Plus Platinum efficiency, the same ripple suppression and and MTLR features as its bigger sibling, and the same electrical/thermal protections. And you still get the 12-year warranty so the PSU outlasts everything else in your rig. The PX-500 has enough juice and straws for HEDT, with two 4+4 pin EPS, and four 6+2 pin PCIe.