Step 1: Buy a fan.
Find a fan from
here and purchase it to be delievered to your home. The link is to 80mm Fans, the fans that are generally used on most cases. Also, you could look around your local electronics store and purchase a fan from there.
Step 2: Plug it In
Your "MSI Motherboard" should have fan headers for connecting multiple fans (however don't uplug that Volcano 9 fan). The fan connector won't fit? No worries, plug it into a molex connector that is coming from your power supply.
Step 3: Mount It
Many cases use purple plastic fan mounts that can hold your fan securely without screws. If you have these, simply slide it on in there (the side with the plastic supports for the fan motor is the side that will be pushing air out). Your fan should come with self tapping screws. If not, try to find a nut and bolt that could also mount the fan to the back of the case (or anywhere else the case may have a fan 'port').
Step 4: Admire your work
I like to sip on some tea as I watch my fans spin. Maybe thats a little retarded, but hey - I get a kick out of it
Step 5: Getting angry with a fan that is too loud
Too loud for your taste? You have a couple options to undervolt that fan
A)
Purchase a rheobus(fan controller) (or make your own, search for schematics on Google) These will make the fan spin slower, in turn lowering the noise made.
B) 5v or 7v Mod your Fan
Here's the 7v Mod, in convenient paint format!
And its 5v Mod Counterpart...
Linky Dinky
And I also hope to god this isn't some lame attempt to boost your postings - If you made that computer in your specs and do not know how to 'add fans'... duh. Well, I'll leave it at that.