A look inside GFB1212VHG 120X50 3.4A.fan. These can't normally be taken apart, but one had shipping damage from China and I got to look inside. The comparison fan is a Matsu****a 120X38 1.3A. Dell BTX fan that suffered a bearing failure. Note the large diameter thin motor on the 2 motor fan, and the brass housing the bearings set in, versus the thin plastic tube on the NMB-MAT.