Low FPS in SQUAD

Hi i bought game named “Squad” which run on UE4 and i have big issue…
My specs : 2x Intel Xeon E5420 2.5GHz 4cores
R9 270x Hawk
16GB ram
1000W source
Windows 10 64-bit
DX11
And in game i’ve got 15FPS. My perf. isnt so bad. And i Squad Forum people told me “its not Squad’s problem but its UE4 problem which have problem with AMD optimalization”… Now i dont know what to do… Can someone help me what to do ? PS: sorry for my ENG

Well I’m totally not an expert on UE4 either and I’ve honestly never heard of that problem before. But from the little I know, I can tell: I easily can bring down UE4 to 15fps or less on my Nvidia card (GTX970), if I throw in too many high poly objects into the game, use huge textures or demanding shaders/materials.
Even though I’m just learning UE4 atm, having an eye on performance for me is part of the process.
So I don’t mean by that the problem you mentioned doesn’t exist or that the developers of that game (which I don’t know either) didn’t care about performance, because I don’t know any of that. Still for me performance is something I as a developer have to watch out and test for, be it on Nvidia or AMD.