ahhhh
I remember years ago, at aceshardware there were discussions how much benefit in terms of power a custom design gives... it was Intel vs AMD back then.
My wild-wild guess is anywhere from 10 to 50%. "Easily" (I mean you can get as much if you have the manpower to research it)
Given how bad...
You should get 25-26 mh from 290... running at 950/1250, and 330-350 sol/s for equichash
There are mem strap mods @techpowerup forums give'em a try
2 weeks ago i sold my last 4 290s for 250e each and bought 4*1060s
Almost same eth speed , much lower power usage, 3y warranty and better value in...
heh .. an year and half ago ROI was like 4-5 months... but I was too afraid of implosion :( and invested only 1k euro.
And then reinvested half of profit... 20 cards atm and 1btc in exchanges/wallets
I prefer to laugh on myself :D
Its not clear from his posts what cards he has, but given that AMD supposedly fixed their drivers for Vega,Fiji &Polaris (increasing ethereum speed with bigger DAGs) because of his input... I prefer to beleive him
https://bitcointalk.org/index.php?topic=1433925.msg20464462#msg20464462
He claims...
Looks like Vega is DOA for end users.
Everything will go for pro-market, they'll sell 1000 cards worldwide to review sites and amd fans...
Noone in his mind will prefer it for gaming instead of 1080/1080ti
there is no bad marketing
What if AMD is going to show us the impossible - make a PR event and admit they have inferior product which is twice more power hungry?
No, best chance (for vega&amd) is if these pro-cards are from 1st chip revision which was faulty somehow, and game-cards will be later, fixed one (Barcelona TLB-like)