TechnoZamb19

if you're a troll; please remove yourself from this environment
 
if you're not a troll; you're throwing your money out the window for getting a less practical gaming experience than you could get for less money.

I keep my pc running 24/7 , it's easier on the components (mechanical hard drives and motherboard and even fans).
PC idles at 100-120 watts due to having 4 mechanical hard drives and an old FX-8320 that's does't lower it's power much when idle
When gaming, it's probably close to 300 watts.
 
Bronze rated power supplies are less efficient when idle, at 10% or so of their output the efficiency often drops to 80% or even less.
In my case with a bronze efficiency If you keep the system running 24/7 using 100w, that's 25w of wasted
I have a Seasonic X-650 Gold Efficiency power supply which is 89% efficient at ~ 10ww, so it's only 12w of wasted electricity. In addition, the fan is off until i hit around 160w so i get silence, and then over 160w the fan barely spins until around 250w.
 
So for 24/7 use, going with this more expensive gold efficiency psu was a savings of around 13w per hour or 312 watts (0.3 kWh per day) or 9.672 kWh ... let's just round it to 10kWh for easy math or 120 kWh in a year.
I'm paying around 0.57 RON (0.12 euro) per kWh with taxes included, so in a year I'm saving 0.12 x 120 =  14.4 euro
When I bought this power supply, the price difference between a quality bronze efficiency power supply and this one was somewhere around 40-50 euro, so I'm basically recovering the extra money spent on this power supply in around 3-4 years.
I'm sure this power supply is quality enough that it will last me more than 5-6 years, pretty sure even 10, and i have the added benefits of passive cooling at idle (less noise) and less heat produced in the house, and also "purer" power to components since it's a higher end power supply.
 
So basically it's a bigger upfront investment which you technically recover in a few years by power savings, depending on how you use your computer.
In my case, i consider the extra 30-50 euro a year in electricity by keeping my pc running 24/7 worth it so it makes sense to aim for higher efficiency at idle (for example 8-14 hours while i sleep or i'm away from pc) , since the risk of components dying is reduced by a big enough percentage in my mind to be worth it.

You can use the same cable.

You can use a cable with a single connection to the PSU and two connections on the GPU end. It's what they're designed for.
 
EDIT: You can also use two separate cables if you want to, but it won't make any difference to performance. I personally use two separate cables for both my GPUs (so 4 PCIe cables in total) because I can't stand the pigtail type 6+2 connectors or the loop back on the dual 6/8 pin cables. 

64gb SSDs are plenty reliable, they're just stupid to buy due to their cost (generally only a few dollars cheaper than a 120gb SSD). 120gb SSDs on the other hand are perfectly fine (still worse price-to-performance, but also still quite a bit cheaper than 250gb SSDs). 
 
120gb SSDs are generally on the slower end of the SSDs rated speeds due to having fewer NAND chips and as a result it also has reduced write endurance (although still stupidly high), but neither are issues for the vast majority of people. 

Windows 7, from a computer that school gave us.