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End of the Road - Anandtech has closed down
(www.anandtech.com)
This is a most excellent place for technology news and articles.
At this point, you could almost just assume next gen CPU is 10% faster than the one that was 10% faster last year.
GPUs are a little more wild, but that's more a side effect of all 3 having wild swings due to hardware changes and driver updates but it's still just a single graph you have to update every few months. Not really enough to run a business on.