Have I chosen the optimal configuration of devices for mining?

Question

data mining

Mat. board: [url= http://market.yandex.ru/model.xml?modelid=10530745... FM2A55 PRO+[/url]
GPU: [url= http://market.yandex.ru/model.xml? modelid=8550093&... Radeon HD 7950[/url]
RAM: [url= http://market.yandex.ru/model.xml?modelid=7916526&... DDR3 1600 DIMM 8Gb[/url]
HDD: [url = http://market.yandex.ru/model.xml?modelid=4893279&... 3QHDD-E215-MS500[/url]
Power supply: [url= http://market.yandex.ru/model.xml? modelid=6199504&... TR2 RX 1200W[/url]
CPU: [Advise]
It turns out to be about 20 thousand rubles, not including the cost of the frame, risers, processor and additional. cooling (+5000 thousand from above)
There is a free room and free electricity, as well as a free internet.
In October I'm leaving for the army, until October I plan to put at least 4 GPU cards on the rack.
I am going to mine dogecoin.
Is the configuration well chosen? Maybe some parts should be replaced? Since I'm leaving for the army, I need, well, at least some kind of confidence that nothing will burn. There is someone to look after, but this will already be arrogance (and so I take the room and the current for free).
What do you think?

Answer 1

You considered at least some kind of payback, it seems that now all currencies are in decline.

Answer 2

You won't get even a tenth of it in a year.
Well, "data mining" is completely different than cryptocurrency mining.