IF YOU HAVE A GTX 970, YOU MAY BE ELIGIBLE FOR A $30 REFUND (US ONLY).
As clickbait-y as that little subtitle seems, it's true. Although this hasn't been covered before by novoGamer, it's not news in the gaming world that Nvidia has recently been under fire for false advertising regarding their GTX 970. The class action lawsuit was filed more than a year ago, in February 2015, over the fact that the card did not have the 4GB of VRAM that was claimed, but only 3.5GB.
This settlement not only goes for people who bought reference cards, but also cards from EVGA, Zotac, MSI, or whatever other company the card was purchased from. This is because of how the card is designed from the ground up.
Jen-Hsun describes the issue in an Nvidia blog, "GTX 970 is a 4GB card. However, the upper 512MB of the additional 1GB is segmented and has reduced bandwidth. This is a good design because we were able to add an additional 1GB for GTX 970 and our software engineers can keep less frequently used data in the 512MB segment. Unfortunately, we failed to communicate this internally to our marketing team, and externally to reviewers at launch."
Funnily enough, Nvidia's rival AMD poked fun at the lawsuit, implementing the slogan "4GB means 4GB" while advertising their R9 290 card. And, if it is to be understood, AMD recently went above and beyond the call of duty by advertising some of their Rx 480 cards to have 4GB of memory while they actually had 8GB.
Details on how to claim the $30 to get your 0.5GB of memory's worth have not been revealed yet. More info here on nG, or the Nvidia blog.