You still need fans for your case and CPU. Although the chipset is passively cooled, you should still have case fans to move the hot air dissipated by the heatpipe/heatsinks away and out of the case.
Passive cooling for chipsets is really good, because it replaces the tiny chipset fans, which are loud and often have a short lifespan.
Intel E6750...........PSN: ELBATROP
XFX nForce 650i Ultra
Patriot PC2-6400 8GB (4x2GB)
36GB WD Raptor
Samsung SyncMaster 931c
Samsung SyncMaster 750s
Windows 7 Home Premium 64