Ethereum forum, they made a calculation and said most GPUs won't be able to mine Ethereum due to DAG limit. Only 4GB and higher will work.
Do you have a source for this calculation? Someone is making a mistake here. The DAG will be 2.24gb in exactly one year. Not over 3gb in 45 days.
Please also see https://github.com/ethereum/wiki/wiki/Ethash-Design-Rationale
QUOTE FROM SITE:
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The ~0.73x per year growth level was chosen to roughly be balanced with Moore's law increases at least initially (exponential growth has a risk of overshooting Moore's law, leading to a situation where mining requires very large amounts of memory and ordinary GPUs are no longer usable for mining).
Furthermore, mining phase will finish in serenity, which is a year away.
That makes the window to make a profit very narrow.
Should start assembling my mining rig right now.You can also ROI with old 280x cards. They are cheap and powerful. For the new Fury cards, you will not ROI.