If you meet the minimum requirements for the GPU, it SHOULD be ok. Keep in mind this also depends on Mobo/CPU as well as other components in your computer, which all will draw power from the PSU. I have seen computers power down under heavy load in scenarios of this nature. Also another thing to keep in mind is that the closer to the Max Output of the PSU you are operating at, the harder it has to work, thus shorter longevity. Add one of these to your purchasing plans(http://www.newegg.com/Product/Product.aspx?Item=N82E16817438016), and you will have no issues.