The r9 295×2 hashrate is 36 MH/s which is the second highest rate among the best cards for ethereum mining, second only to Radeon R9 295X2. If you looking to built the best ether mining hardware, then you have to have this card.
The power consumption of 375W at the wall and each GPU has a return of over $470 annually and has a profit ratio per day of 56%. Available on online retailers such as Amazon, this is one of the most cost-efficient alternatives for Ethereum miners. The Radeon HD 7990 come with a hash rate of 36 MH per second. It has a payback period that slightly exceeds one year. It has a daily cost estimated at $1.08 and a return of $1.29.
Pros
Second highest hash rate It is budget friendly Moderate power consumption Each year, the expected ROI is $470