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I would start here: https://en.bitcoin.it/wiki/Mining_hardware_comparison
It is a massive list of cards and their hash rates. Now in terms of buying the cards, you could go 2 different routes. Both have pros and cons. You could either go on a site like Newegg.com and buy new. Which is the more expensive option but it guarantees what ever you buy will work. The other option is ebay and buy new/used cards. New tend to be even more expensive than Newegg but you can find used cards that are in perfect working order for way under the MSRP of a new one. But of course there is always risk of buying used but the saving are worth it. I have about 50/50 new and used cards in my mining rigs.
It is a massive list of cards and their hash rates. Now in terms of buying the cards, you could go 2 different routes. Both have pros and cons. You could either go on a site like Newegg.com and buy new. Which is the more expensive option but it guarantees what ever you buy will work. The other option is ebay and buy new/used cards. New tend to be even more expensive than Newegg but you can find used cards that are in perfect working order for way under the MSRP of a new one. But of course there is always risk of buying used but the saving are worth it. I have about 50/50 new and used cards in my mining rigs.
Yeah, I've been looking at that list. I'm just curious about a two card setup. I've never done it before, so I was interested if I purchased two Gigabyte 7950 from NewEgg how well they would work together on the board and case I have. I've never used Crossfire before.
What kind of power supply would you recommend with two 7950?
Thanks.
- bump - 
