I have a Gigabyte X38 mobo. It has two PCIe slots, one up close to the northbridge/RAM (labeled as PCIE_16_1 in my mobo manual), and another further down, that's pretty much separated from everything (labeled PCIE_16_2 in the manual). I choose to put mine in the lower slot (ie: 2), to keep it as far away from other heat producing components as possible. Both slots are blue, and, as I understand it, both slots are PCIe 2.0. As such, I'm assuming both slots run at full bandwidth. Would this be a correct assessment? The system runs fine with the card in this slot, but I'm just wondering if there is some kind of mandate that says which slot you need to install in when using only one card.