How does one prove that though?
I agree. That's why I find this really odd. I can't imagine lawyers were not in involved in writing that. So it seems to me they were either incompetent and didn't mean to make it vague, or they intentionally made it vague to confuse and frustrate consumers so they wouldn't bother suing.
But considering consumers could get up to $300 per CPU, with a maximum of 5 CPUs per claimant without proof of purchase, IMO, it would be worth sorting through the confusion. That said, it says "up to" $300 so I suspect the more people joining the class-action suit, the smaller their share of the settlement they will get. Note
Anandtech estimates users will receive closer to $35.
And what is the lawsuit in regards to exactly?
Well if you follow the link in DeathtoGnomes' post number 7, scroll down to the bottom and click on the word "Notice" to open the .pdf file, then look under "BASIC INFORMATION", you will see,
3. What is this lawsuit about?
The lawsuit claims that AMD misrepresented the number of cores in certain of its CPUs and that AMD is liable for
violations of California’s Unfair Competition Law and California’s False Advertising Law, as well as other laws.
AMD denies all claims and that it violated any law.
This lawsuit is an out for people who bought into hype or didn't do their homework.
In this situation, it is not about failing to do their homework - at least not for the early buyers.