None of this is an issue, since I have a full tower case and a 1200 watts Thermaltake power supply :)
However, what if I'll go with 2 MSI GTX 970 in SLI, will my i5 2500k@4.2Ghz (can't overclock it any higher, lost in CPU lottery, lol) and a Gigabyte GA-P67A-UD7 motherboard bottleneck those 2...