AMD HD 7850 Screen Flickers during some games

Jan 4, 2018
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My cousin have sapphire hd 7850 dual-x.
when i play some games like Gta 5, watch dogs 1 and 2 then it appear screen flickers or noise.
but when i tested farcry 3 or Furmark stress test for 15 to 20 minutes for 2 times .but there is no problem. what should i do? RIP GPU?
i have tested on 2 PC.same problem it had. THANKS.
edited: Max temp 58'C during Furmark stress test.
during gaming 55'C. but some games its show 20'C with help of MSI Afterburner