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January 05, 2014, 11:13:45 PM |
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290x i get about 900kh (38¢/hash if card 346€) 280x i get about 750kh (38¢/hash if card 285€)
290x @ 290w @ 900kh = 0.32w/hash
280x @ 250w @ 750kh = 0.33w/hash
pretty much a tossup. i have more 280x than 290x, but around where i live, the 290x is ~166% the price of a 280x.
if you are running an open rig, then i'd get the 290x. if you will be running where heat will be a factor, the 280x does produce less heat.
lastly, can you even get the cards? i am buying 290x and 270x (450khash) right now becuase i can't get 280x. you may not have the choice if e-key is sold out like the rest of the world.
suggest you buy what's available right now, and start mining as soon as you can. even a week delay makes a difference in your return.
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