The tech community is abuzz with rumors about the existence of the RX 490, the purported high-end graphics card from AMD which was accidentally listed on the company's websites back in July. There are rumors that AMD might release the video card before the end of the year despite the lack of confirmation or hint from the company.

Due to lack of evidence to support these claims, some tech analyst said that these speculations should be taken with a grain of salt. However, lack of evidence has not deterred some from speculating that the RX 490 might end up being a dual-GPU configuration with two Polaris 10 chips integrated on a single PCB. This configuration is intended to compete with the Nvidia's high-end GTX 1080 graphics cards.

An alternative theory about the RX 490 claims that the graphics card will hit the market early next year with a Vega 10 chip instead of the two Polaris 10 chips.

According to WCCFTech, the possibility of a dual-GPU configuration of the RX 490 is backed by a leaked Zauba shipment manifest and RRA certification. The leak revealed GPU specs that are similar to the RX 480, RX 470m and RX 480, along with a mysterious card that is yet to hit the market. The card's board is codenamed "C99" and it shows that it has passed RRA certification back in April, long before AMD completed the development of the Vega 10 technology.

Since the mysterious graphics card was certified way before Vega 10 was completed, this opens the possibility that AMD will use the Polaris 10 technology, its most powerful technology to date. The dual-GPU theory was fueled even more by the information on the leaked manifest showing that the mysterious graphics card's insurance is twice the insurance cost of the RX 480. According to KitGuru, Some theorists also supported their case by using AMD's claim that two RX 480s can beat a single GTX 1080 in terms of performance.