Hi all, This is my first time building my own system, hense the question. I have bought a 4-pin case fan to bring extra air into my case, this obviously plugs into one of the 4 pin pwr cables from the PSU. My question is, the 4-pin adapter on the fan has a male and a female, so is it safe to put an addition fan in as well and run it from the fans female socket. Is this the way to do it as I have no other available 4-pin Pwr cables from the PSU.

Yeah, you can do that, just remember that the more hardware you have connected, the larger the PSU you will need. Also, you don't want a ton of air getting sucked in, and none getting blown out. Try to keep the airflow even. Otherwise you will create stagnant air, and the computer will not cool down. If you use a few fans in your case, you might look at getting or making a fanbus. Not too expensive to make, and you can run all of your fans off one molex connector. Try out some of these sites. http://www.virtual-hideout.net/ - great guides and www.pcmods.com - you can buy a fanbus here

Go ahead and install your front mounted case fan. Double check to see that it is blowing air into the case. Don't worry about stagnant air building up inside your case if your power supply fan exhuasts more air than the front fan pulls in. This type of fan uses 2 or 3 watts of power so adding one should not, repeat not, be of concern if your power supply is a modern 250 watt or higher model.

Better off mounting the fan at the rear of the case so it pulls the warm air out, this way it will also draw cool air in through the case vents at the front..i got my cpu to run 5c cooler just by moving my front mounted fan to the rear.

Not too sure, but I believe my computer is set up like what you're saying. The back fan and front fan are two-pin, and they both go into a 4-pin connector. I also have a dual-fan in one of my 5.25 bays that's blowing air out. Should I change it to blow air in instead? Or should I keep it blowing out since it's the 3rd from the top (near the top)?