Intel took over the standards organization and relabeled the form factor "ATX." Power-supply manufacturers responded by putting ATX PSU internals in their PS/2-form-factor casings. With the latter came a new 20-pin power connector that would support electronic switching. From these, we got the AT form-factor motherboard with dual six-pin power connectors, and the PS/2 form factor for power-supply casings (not to mention, a miniature keyboard connector).įrom there, Intel developed the AT Extended (ATX) motherboard form factor, which added more room around the processor and put an extended port panel behind that space. But a brief history of today's PSU designs really begins a little later, in a time before the now-familiar ATX form factor existed, to the IBM PC AT and PS/2 of the 1980s. ![]() Power supplies, as we know them in desktop PCs, go all the way back to the original IBM PC. What Fits? Power-Supply Form-Factor Basics ![]() This guide will give you a brief rundown of desktop power-supply lingo and basics here in 2021, and get you up to speed on what to look for. ![]() PSU shopping is laden with its own language, though. Best Malware Removal and Protection Software.
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