I am planning to add a new gpu on my pc. I found AMD Radeon HD 7990 as the most compatible graphic card. But I need some information on the performance output. I hope there will be some information available on the same. I found this card as a budget card but it is a bit complicated to judge a graphic card. I am looking for some decent performance card that can run all the latest game without putting a much pressure to the power supply. I found that AMD Radeon HD 7990 is one of the most power efficient card. Is that true.
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