COOLER MASTER Blade Master 120mm Case Fan for $4.59 after code EMCNBHJ262 and using this $5 rebate.  Here is a screenshot before the $5 rebate for your reference.  It features wide PWM fan speed range between 600 - 2000 R.P.M., anti-vibration rubber pads around the edges, and is recommended for Hyper 212 Plus, V8, V10, [...]