SilverStone introduced two entry-level PSUs under its Strider Essential series, the 400W ST40F-ES and 500W ST50F-ES. The two are feature fixed (non-modular) cabling, ATX 2.3 compliance, and 80 Plus certification. Under the hood is a single +12V rail design with active PFC. The unit is cooled by a 120 mm fan with a noise output of 18 dBA. Connectors apart from the 24-pin ATX and 4+4 pin CPU power connectors include two 6-pin PCI-E (for the 400W model), one 6-pin and 6+2 pin PCI-E connectors (for the 500W model), four SATA, three Molex, and one Floppy. The ST40F-ES and ST50F-ES are priced at US $49.99 and $59.99, respectively.