3D Game Man posted a review on the CoolIT Systems PCI Cooling Booster
It is in my opinion that CoolIT Systems has targeted a specific audience here. We can see that there are benefits from a cooling fan above the PCI cards. Whether or not it is worth buying this cooling system is dependent on your setup. If you have a couple of video cards that have dual slot cooling fans on them, the PCI Cooling Booster is probably not going to do much for you. If you happen to run a system with a single slot cooler, or if you are running a passively cooled card, then this would be a viable option for you.CoolIT Systems PCI Cooling Booster Review