I would like to share my experience when it came to modding my CoolerMaster Cosmos 1000 Case to improve my GPU cooling in SLI.
While I love the good looks, roominess and tooless features of the Cosmos 1000, most reviews quibbled about it's lack luster cooling around the Hard Drive bay. I had already solved this problem by removing the bottom case 120mm fan and placing it directly on top of the HD bay. I replaced the bottom 120mm fan with the 120mm fan at the back of the case and purchased a CoolerMaster 120mm Led Blue Silent Fan (TLF-S12-EB) and placed it at the back of the case where the blue hues could be appreciated.
Although I have RivaTuner moderating my GPU temps by incorporating three fan profile speeds, as the temps increase while playing 3D intensive games, I also exercised additional caution by removing my side case panel.
Since I was getting tired of removing the side panel every time I gamed, I decided to mod the side panel to enable ventilation by placing a newly purchased CoolerMaster 120mm Led Blue Silent Fan (TLF-S12-EB) to directly exhaust the heat generated by the GPUs.
I've added five pictures (below) to demonstrate my progression.
As you can see in Picture #1, I took a piece of paper (size of the CoolerMaster 120mm fan) and punctured the fan screw holes directly in the paper. Then I traced a grid with each square measuring 5,6 mm (7/32") the circumference of the Titanium Drill Bit. I traced an X in each square for centering. I then predrilled with a smaller Drill Bit (to prevent slippage) before I used the 5.6mm Titanium Drill Bit to drill all the required holes.
In Picture #2, you can see that all the holes have been drilled, the schemata had been removed and the metal shavings have been cleaned from in and around the holes.
In Picture #3, you can see the back side of the panel, where in my case, I had to remove some of the sound proofing material prior to drilling.
Picture #4, showcases the Fan screwed onto the case.
Picture #5, the Fan is now in operation!