i hope not as im trying to sell mine for 300€ on ebay
..but seriously ...yes, you should see thier value go down very soon (as soon as availability of 6xx series impouves). so my guess is 2 months at the most.
I'd say that's an excellent price for a 580, especially one that overclocks to 950 core on reference air cooling. The Matrix/Hydrocopper/Ultra I have reaches that level and they're binned cards.
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