Is this a good offer?
Could I play with it like playing fortnite together with a GTX 770?
Yes you could
Save 100 euro more and you can get your new Ryzen with DDR4 RAM and the matching motherboard. The system is faster and more future proof, because you can upgrade without any problems.
And which then?
Eg. So https://www.mindfactory.de/...7deb8f48b0
Can also get a weaker Ryzen 5 2400g, if you want to stay below 300? But with the 311 euro you can't do wrong.
You then have 16gb of RAM and the CPU is faster than this i5 and has more cores and it is overclockable.
For 100 euro I would have bought it, but for 200 euro? No thanks.