Finally had an awesome time building the rig. Built last night. Since it was my first time building, took me around 5-6 hours just to setup the hardware.
1) Tricky parts were :
Installing the CPU cooler: Used the wrong screws many times, had a hard time deciding the configuration/direction of heatsink and fan, and how to spread the thermal paste. One thing I was worried about was that I could still move the heatsink over the processor after screwing everything very slightly. Tightened again after removing fan but still there was some movement, left it at that. Seems to be okay so far, I am getting temperatures of 28 C Processor and 29 C Mobo in the BIOS, using coretemp the temperatures were ~30-35 idling.
2) Screwing the motherboard in the case took a long time. First, turned out that the Corsair 300R has only 1 standoff and the rest are raised platforms. Then the screws were tiny and hard to screw in, was not confident that it was properly installed. But ultimately saw no other way to install it better.
3) Rest was pretty easy except maybe some hard to reach pins like the CPU suppl power
4) For the UPS, I chose the APC pro 1000. It's only 600 watts but the seller has agreed to provide higher wattage UPS if power is found to be inadequate. It shows the power usage on an LCD display and so far it hasn't gone beyond 350 watts.
So far, I've only been able to test Crysis, Skyrim and Dirt 3, and they run absolutely flawlessly. System is unexpectedly quiet. BIG CHANGE from the 35 fps of a 6770m on a 15.6 inch screen on medium @1152*864 to constant 60+ FPS, everything ultra full AA, AF @ 1080p on a 23 inch screen. Very happy
