Sapphire has long been AMD's leading partner in the GPU arena. With the growing popularity of 1440, 2K and 4K gaming, manufacturers have been taking "liberties" with the GPUs such as factory overclocks, higher power delivery, and more memory (VRAM). The Sapphire Vapor-X 290x is slightly different from other 290x's as it houses 8 gigabytes of RAM vs. 4 Gigabytes. modders-inc.com
