Corsair SF1000L Fully Modular Low-Noise SFX Power Supply 1000W CP9020246NA. CORSAIR SF-L Series Fully Modular SFX Power Supplies with ATX 3.0 and PCIe 5.0 compliance provide the continuous high wattages demanded by the latest PC hardware, all in a space-saving SFX-L form-factor. Micro-fit PSU connectors and fully modular, flexible cables enable a tidy and compact build, even for exceedingly powerful systems.