something fishy is going on here.
There are lots of "fake" GPUs on ebay. All the best. I would suggest, you verify the card you have is INDEED the one you are looking for.
Your listing says its mining specific, that might be an issue too if you plan on gaming, although i think the mining ones did not have any jacks on the back of the card to plug in your monitor.
de.das.dude. Thanks. That was (is) my fear. I assume that you went to the link to where I bought it. It shows that there are 1 HDMI and 3 Display Port jacks and 1 DVI-D dual link jack. Here is the link again in case you missed it.
https://www.ebay.com/itm/AMD-Radeon-RX-580-8GB-DDR5-DirectX-Gaming-Mining-GPU/352980173258?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649 . When I purchased, the listing said more than 100 available (you have to scroll down to the further information). The listing has now ended and I suspect that it was because I wrote them advising that their listing had incorrect information, calling it a "Biostar RX580" and I pointed to a photo that I found on Bing Images which was from a website 1688.com (I think that this is the Chinese version of Alibaba.com). I included the picture and referenced this above. The picture is of an identical unit (other than the stickers on the fans that idenitified the card as "Nienda"). I didn't expect one and I didn't get a response. Checking today on their EBay store, they have nothing for sale at all in their store, let alone this card.
However, the card does appear to be "somewhat genuine". I looked at the following page for some clues as to how to spot a fake -
https://graphicscardhub.com/chinese-fake-graphics-card/. The specs on TechpowerUp are listed at
https://www.techpowerup.com/gpu-specs/radeon-rx-580.c2938. Attached is the GPU-Z screenshots of the first 2 tabs of my card - the Sensors one is after running Furmark stress test. On the first page, the specs match what the specs page on TechPowerUp show. On the second page, showing the maximum result realized for each sensor, a number of the readings are what is expected (e.g. the GPU clock (1340 MHz for an overclocked board) and Memory Clock (1950 MHz - which is 50 MHz less than what is noted on the website)), however, the GPU Chip Power draw of 4,196,645 W should have blown every breaker in the neighbourhood.
The readings that trouble me the most are the 3 memory readings. This board is supposed to have 8GB of onboard memory. I assume that the Memory Used (Dedicated) and Memory Used (Dynamic) are onboard memory and, combined, they didn't go over 1,539 MB. The maximum system memory used however, shows as 10,924 MB. Perhaps there is some explanation for this. I feel somewhat less concerned though, when I look at the Performance tab in Task Manager which is attached. As you can see, Windows thinks that there is 8GB of Dedicated GPU memory available. So, issue settled unless there is a way to fool Windows into thinking that there is more memory than actual. So, I am going to assume that I have a Nienda RX580 OC 8GB board.
Thanks again for your inquiry and enjoying the rest of the weekend.
Nienda apparently exists.
(tried so many things and used like 20 hours without help)