Unfortunately some budget cases do not offer to install optional front intake fan.How important are intake fans.I want to build a gaming pc but one is more budget desktop with something specs like an intel i3 proccessor rad hd 4670 and another one is an intel i7 with gtx 470.But in my instance how important are intake fans?
more exhaust air flow is always more important than intake. a fan at the upper rear getting the hot air out is most important, and as it removes this hot air, cool air is also drawn in through ventilation holes in the case. I have tested this using 1 fan. temperature is much lower when it is set up at the upper rear sucking out hot air than in the front blowing cool air in.