@rma card

1. The 3rd fan of the gfx is making rattling noise(zzzzzzuuuuuuuuuuuuuu zzzzzzuuuuuuuuuu) at 68-73% fan speed bellow that and above that particular speed there is no noise, can anyone tell me what may be the problem? 2. while using "Firestorm" OC scanner only 1mhz is getting overclocked, am i...