Even if one completely forgets the memory issue, there's no way to excuse the false ROP count. That count was featured prominently in just about every review, and I'll bet the reviewers' guide has it as well.
Edit: I was right, here's a page from the official reviewers' guide. This is a document sent by nVidia for reviewers to use. Look at the ROPs and L2 cache:
The lawyers can completely ignore the memory if they like, all they have to do is show that document in court, and also demonstrate that review sites published the same specs which then buying customers used as part of their purchasing decision.
And then of course Nvidia's lawyers will argue that people bought the cards based off the reviewed performance and nothing has changed there. Lets be honest, no one buys cards for ROP or L2 counts.
Its going to go something like this in court.
Nvidia: "So why did you buy the card."
Plaintiff: "It had 64 ROPs and 2 MB L2."
Nvidia: "Really? So that was the main reason why you bought the card?"
Plaintiff: "It was a major contributing factor."
Nvidia: "So you didn't buy the card off of the reviewed performance? That wasn't the primary source of evaluation?"
Plaintiff: "Well.....actually it was. But I thought 64 ROPs and 2 MB L2 were necessary for high end performance."
Nvidia: " Has performance changed since you bought the card?"
Plaintiff: "No. But your specs were wrong. You lied about that. I wanted a high end card with high end specs."
Nvidia: "You wanted a high end card but with the restriction that it had very high end specs?"
Plaintiff: "Yes."
Nvidia: "Why on earth did you buy what you thought was a 256 bit card? That's not high end. Why would you buy a card with so obvious a limitation?"
Plaintiff: "The reviews indicated that it didn't matter. It performed very well."
Nvidia: "So you bought the card for the reviewed performance, NOT raw specifications."
Plaintiff: (upset) "Yes."
Nvidia: "Has that changed...."
I'll bet this will be an argument used by Nvidia against anyone griping against the specs.
Furthermore, the plaintiff will likely have to prove that they would not have bought the card if they were aware of the true specifications.
GTX 980 specs:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-980/specifications
GTX 970 specs:
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-970/specifications
What's the difference in memory specifications here? Can you tell, from their own pages and specifications, that there is any difference in memory performance here? No? Neither can I.
But by Nvidia's own admission, there is a
material difference. Although the two memory subsystems are specced the same, they do not perform the same. How is a consumer supposed to figure this out? I have no idea, because the most reliable source of information, the reviewers, were also duped. And by that time, it was too late - I bought the card already.
TLDR - Identical memory specs. Not identical memory performance. That's false advertising. (4GB vs 3.5 GB has no merit per se; it's when 4GB on the GTX 970 means 3.5 + 0.5 when the 4GB on the GTX 980 means 4GB that there's a problem.
And here you fail again with regards to the legal system. It doesn't matter how the 4 GB is partitioned. 4 GB was on the package and 4 GB is what you get. 3.5 + 0.5 is still 4.
There is a difference between right and legal. Nvidia is not right. Unfortunately what they did is very likely going to be found to be legal. It doesn't matter if I substitute 10 Kg apples for oranges and sell it to you for the same price as long as, as per our agreement, I am selling you what is defined as 'fruit'.
They said 4 GB RAM. Is there 4 GB RAM? Yes there is. They do not need to say anything more than that. They do not need to distinguish it from the 980. The claim they made was 4 GB GDDR5 which is found on the card and is fully accessible is true.
Again, I do not like what Nvidia is doing. However, I will go out and say that it will be an uphill battle to prove this case against them. Do I support them? No. However, they are on the legal high ground (definitely not the moral high ground) and I expect the case to progress accordingly. That is america's legal system.