So I was cleaning out my closet of excess PC parts and found a Dual-X R9 280. I'm currently using the MSI GTX 960 4GB which I recall as being better, though i couldnt use the R9 properly because I didnt have the correct drivers installed. So my question is which is better? Which do I use in my PC and which do I sell? Thanks
links to cards
https://www.amazon.com/MSI-GAMING-GTX-960-4G/dp/B00V4HY522/ref=sr_1_1?ie=UTF8&qid=1476658702&sr=8-1&keywords=msi+gtx+960+4gb
https://www.amazon.com/Sapphire-DUAL-X-DisplayPort-PCI-Express-11230-00-20G/dp/B00LS3CKCE/ref=sr_1_7?ie=UTF8&qid=1476658737&sr=8-7&keywords=sapphire+radeon+r9+280+3gb
links to cards
https://www.amazon.com/MSI-GAMING-GTX-960-4G/dp/B00V4HY522/ref=sr_1_1?ie=UTF8&qid=1476658702&sr=8-1&keywords=msi+gtx+960+4gb
https://www.amazon.com/Sapphire-DUAL-X-DisplayPort-PCI-Express-11230-00-20G/dp/B00LS3CKCE/ref=sr_1_7?ie=UTF8&qid=1476658737&sr=8-7&keywords=sapphire+radeon+r9+280+3gb