pls visit this link. this is my gpu
http://www.zotac.com/products/graphics-cards/geforce-600-series/gtx-650/product/gtx-650/detail/geforce-gtx-650-synergy-edition-1.html
Well it does say "SLI support.....N/A" in Specifications so I think it is safe to assume it can't be used in SLI.
Edit: Derp on my part, you can't crossfire GTX 650s period apparently.
pls visit this link. this is my gpu
http://www.zotac.com/products/graphics-cards/geforce-600-series/gtx-650/product/gtx-650/detail/geforce-gtx-650-synergy-edition-1.html
Well it does say "SLI support.....N/A" in Specifications so I think it is safe to assume it can't be used in SLI.
Edit: Derp on my part, you can't crossfire GTX 650s period apparently.