i had a gpu which was sapphire r7 265. There was problem with that and i contacted my retailer. they sent me a replacement gpu named rx 460 4gb ddr5 oc eight days ago. Now i am experiencing very low FPS than normal. After a restart it again works nice but after short time again low Fps. it seems i am playing on onboard gpu but my onboard is dsabled. i never saw this with my previous r7 265. i reinstalled my OS and latest amd driver. In GPUZ , i am seeing some weird things like directx is unknown.i have uploaded the screenshot.So, is everything ok with that gpu?