Hi, I am considering adding another HD 6970 to my rig. Here is my configuration: Corsair Obsidian 800D I7 2600K OC to 4.6GHZ Noctua NH-D14 CPU Cooler Asus Maximus Extreme - Z Corsair Vengeance 4 x 4 gb kit 1688 LP Corsair AX 1200 Gold Standard Crucial 128 GB SSD WD Black Cavier 1 TB Asus HD 6970 Direct CU II I have also added 3 120mm Noctua fans at the top of the case as exhaust fans, as well as replaced all stocking 140 mm fans to Noisebreaker PK-3. Here are my questions: 1. When I insert the graphic card into the first PCI-E slot (the one closest to CPU), it runs really hot: 50 at idle and 80+ at full load. While I use the 2nd PCI-E slot, it runs quite normal (idle at around 40 and never goes over 60 at full load). Does anyone know why this is? I would have imagined better air flow with the card being installed at the first PCI-E slot, as it gives more space for air flow (800D has a 140 mm fan as main air intake at the bottom). 2. As Asus HD 6970 Direct CU II takes 3 expansion slots, I will have to pick up another 2 slot version of HD 6970 as I am running out of space. I am eyeing at 2 options: Asus EAH HD 6970 2 GB reference version, or Sapphire HD 6970 dual fan edition. Which one would you guys recommend and why? 3. Further to the 2 questions above, I am thinking installing the 2 slot HD 6970 at the top PCI-E slot, and install Asus 6970 DCU II at the 3rd PCI-E slot. The reason that I do not use the 4th PCI-E slot is because it litterally leaves no space between the GPU and the metal that divides the MB department and PSU. So that leaves only one slot between the 2 GPUs. Would that be sufficient for cooling? I am not looking into water cooling at all. Thanks for your insights in advance.