what about the NV cards with better cuda/opencl drivers (quadro, tesla or whatever)?
I know it's not a viable option, but does it offer any significant improvement over the geforces for bitcoin mining?
All NV GPUs suck compared to AMD GPUs for mining. It's down to the fundamental architecture of the GPUs. There is ZERO room in this thread to argue otherwise. NV can't compete in any type of coin mining that has any value AFAIK. This "article" is simply stating the obvious. If you want to mine coins w/ GPUs, AMD is the only way to go.
It's true that GPU mining profitability is enjoying a resurgence, but it will be short-lived, because specialized miner equipment (ASICs) have shipped and will continue to ship and are 10-20x more efficient than GPUs at scrounging up those 3600 coins that get mined every day. The size of the pie remains constant (3600 coins/day for the next 3.5 years, after which it will be 1800 coins/day and continue to fall in half every four years) but ASICs are incredibly efficient at getting pie, and GPUs nowhere near as efficient. Thus GPU mining profitability will likely continue to dwindle unless bitcoins rise in price to offset that, but if it does, it won't be because of mining difficulty. Bitcoin price is set by supply vs demand and about 11 million bitcoins already exist. So the supply is pretty much fixed in the short term because every day only 3600 more coins are produced, and 3600 is a drop in the bucket compared to 11 million. We've been over this a million times already in the bitcoin thread and at bitcointalk.org: bitcoin price influences mining rates, NOT the other way around!!! If bitcoin dropped to $1 tomorrow, that would drag down mining rates. If mining rates doubled tomorrow, that would not double bitcoin prices.
But that's not really the point of the article in OP, which is that NV GPUs suck in mining, and that fact won't be changing anytime soon because it's baked into the NV GPU architecture, and even if NV tried to change their arch today, by the time they did, GPU mining wouldn't be profitable for anyone anyway as ASICs and FPGAs would rule the roost. There is no argument. This is old news. The only people raising a fuss are fanboys who do not know the meaning of "choosing one's battles." If you want to argue about bitcoins there is already a thread for that, but there should be zero disagreement about AMD > NV GPUs for mining. The gap can't be bridged in time. Moving on....