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What is the Radeon 540 discrete GPU for? And why is it not supported by AMD officially?

Question asked by vaintelog on Jan 29, 2019
Latest reply on Nov 21, 2019 by jenis

I have a Lenovo Ideapad 330-15ARR with Ryzen 5 2500U and Radeon 540 dGPU. I'm a bit confused as the dGPU performs poorly on some old games even though I installed official Lenovo drivers. CS:GO runs from 40-60 fps at max settings with V-Sync off which is a bit questionable since this is a really lightweight title and the dGPU should be able to life Source Engine without a problem. Looking at its spec sheet, it seems like the equivalent card would be the RX variant RX 540 which has a higher memory bandwith and texture compute units unlike the base 540 only. There are no reviews and comparisons for this specific GPU online so it's a bit confusing to see what this was really made for.