Corsair’s PinProtect watches the GPU connector one contact at a time
Corsair’s new RM1200e power supply measures current through each of the six 12 V power contacts in its GPU connection. Its PinProtect circuit can therefore respond to an individual overloaded path even when the total current has not reached a supply level protection threshold.
The 1200 W PSU, announced on 21 October, introduces the feature on a native 12V-2×6 interface. Current need not divide equally between the connector’s parallel paths: resistance differences alter the distribution. A contact carrying more than its intended share can dissipate excessive heat while the overall GPU load remains within its power budget. That is the useful distinction in measuring each contact.
PinProtect monitors current, rather than directly measuring each contact’s temperature. Corsair’s technical guide describes a 30 second persistence period to distinguish sustained abnormal current from a temporary excursion. If the condition clears, operation continues. If it persists, the GPU shuts down and the PSU fan runs at full speed as an audible indication. The RM1200e implementation operates without iCUE software and cannot be disabled.
The delay is an important part of the protection behaviour. An instantaneous trip could respond to legitimate load transients; allowing a sustained overload to continue adds energy to the affected connection. The relevant quantities include the current distribution, contact resistance and the time before intervention. The guide gives a delay, but no current threshold or complete trip curve, so it does not establish how much energy would pass through a particular faulty contact.
Corsair also describes a separate PinProtect+ implementation with finer measurement and software integration on the HX1000i SHIFT Crystal. The RM1200e’s system runs locally inside the PSU, with the fan and the loss of GPU output providing the indication that it has intervened.
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Image: Corsair RM1200e. Manufacturer product image. Image source.
