this psu is enough for my system?

Solution

It depends on the model of fsp.
With Seasonic, any model, you can't go wrong.
That PSU would do just fine uhm, but assuming your in .de you should make sure that you get a reputable power supply as wattage doesnt mean better quality... Make sure you get a PSU with lots of componentry! But yeah 700W is fine
 
Never go for a cheap PSU. It's a bad idea to do that, as you risk your components to die as the PSU dies as well, due to a fake power label. This one will power your system fine -

Antec High Current Gamer 620w 80+ Bronze certified semi-modular PSU - http://www.amazon.de/Antec-High-Current-Gamer-Stromversorgung/dp/B0047YISS6/ref=sr_1_1?ie=UTF8&qid=1384464610&sr=8-1&keywords=antec+high+current+gamer

To answer your second question, you don't need such a super industrial strength motherboard to support that CPU. I have one better, which overclocks just as well and saves on money -

Asus M5A97 EVO R2.0 AM3+ Motherboard - http://www.amazon.de/M5A97-EVO-R2-0-Mainboard-CrossFireX/dp/B008RPZ5H8/ref=sr_1_1?ie=UTF8&qid=1384464730&sr=8-1&keywords=asus+m5a97+evo+r2.0

This board will support your CPU just fine, plus overclocking.
 
A 7950 will need a 500w psu.
From that you might think 700w is ok.
But... the psu you linked is a cheap one that does not deliver the amps that a quality 550w psu does.
If you have access to a quality unit like Seasonic, corsair, antec, xfx then spend a bit more and buy a good psu.
A cheap psu can become very expensive if it fails and damages other components.
 
You guys are right, because right now i typing this message with my phone. Why? because no name psu "codegen" burned my pc components cpu gpu and hdd 😀
how about this one?
http://www.fsp-europe.com/professional/fsp650_80egn_90plus.php
its pretty much the same price
and the last question
will this psu is having long cables?
because i gonna put in pretty big case: aerocool x strike one.
asus mobos dont have alc889 108 db so thats why i am aware of asus.