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Strictly speaking I only have 1 case fan. A 120mm Coolermaster Aluminium fan blowing in from the back of my Lian Li V1000b.
As for other fans,
1x120mm on the radiator
Chipset fan - stock DFI solution
Vid card - Zalman VF700
PSU - 2x80mm Thermaltake fans which I can't hear at all,
2x120
1x80 (zalman cnps7000alcu)
1x92 (ghetto mod on a 6600gtoc/vf700)
in other words, a stocker...
but only because I just got my V1000b+ and I haven't needed to increase airflow (old 2.8c mATX system in it currently until I get my a8r32/opt165/1900XT/2gb ocz p-xtc). Though I don't see myself needing to cut holes, nor do I want to in this sexy thing