Summary: I have a GPU with no fan just a heat sink. it was cooking at 100c when playing games. It doesn't get over 55c now even maxing the card out. I have the fan flipped and the intake resting about 1mm over the heat sink. very lucky I guess how my computer is set up. Very happy with this.
Summary: I flipped the bracket on this and put it over my MSI AMD Radeon R9 280, 3GB GDDR5. It only knocks off 2-3 celsius when the card is at idle and when running Heaven benchmark (1600x900, extreme fullscreen). Vibration and noise are not a issue. If you need it this is a good buy as for myself... this was just a cheap experiment.
Summary: It made my gpu warmer. It doesn't line up with it. It also wiggles in it's spot despite the screw being all the way tightened. This means it bumps my Wi-Fi card. Worst of all, it used more watts than advertised damaging my Corsair Power Supply Unit. Now the PSUno longer delivers nearly as much power as it did before.
Summary: I purchased this to add some extra air flow when I changed to a motherboard that put out a bit higher heat than my old ones. It fits nicely into a spare card bay without requiring it to be inserted in a slot. Works well for the purpose intended. Easy install.
Summary: I bought this for replacement of the PCI protecting panel on the back of my computer case, which is not reusable once it is took off. I was not expecting spectacular ventalition before purchasing this fan. However, the comparision with rear case fan told me that this PCI fan contributes even more to the total ventalition, though it is working with noise that I can distinguish from the CPU fan.
Summary: I ran a similar blower fan rated for 12cfm at 12v and this at 12v. The 12cfm fan was blowing more air. I'm unsure what this fan actually has for a flow rate. It's fine for pc cooling purposes, I was hoping I could use it as a more powerful fan for a side project. Not the case.