Diamond Radeon 5850 HD Discontinuation

PhilosophyPower

Distinguished
Sep 19, 2011
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I'm currently seeking my first Crossfire build. But I have a Diamond Radeon 5850 HD which has been discontinued.

I'm a real stickler for matching cards. However, is there a compatible card I can pair with my current Diamond Radeon 5850 HD, which will have no compatibility issues?

Also: How big of a power supply would I need?