By using the BIOS that came with your card.
However, what if it's just as simple as this: the card is manufactured with the intention of selling it as a GTX 470. They test it but it doesn't meet their standards. It receives a GTX 465s BIOS. In a sense, this BIOS has limited eyesight: it can't see everything on the card: it's only capable of recognizing everything that it's programmed to look for and can't see past that.
So then a customer gets a hold of this card and flashes it with a GTX 470s BIOS. This BIOS is programmed to look for (and use) everything on the card, and therefore has a greater field of vision than the GTX 465's BIOS (so to speak, that is).
So then let's say that the customer runs into financial trouble and just decides to return the card. So, they flash it with a GTX 465's BIOS and send it back. The GTX 465's BIOS "knows" the specifications of the GTX 465, and therefore they should all have the same limited range of vision that the original BIOS had so to speak, right? I mean, as long as the BIOS has the same specifications, then I don't see how it can be any more complex than this.
In other words, I don't look at this whole thing as "unlocking", or "locking", or "locked" and "unlocked". If it's able to work with a GTX 470's BIOS, then I see it being as simple as this: the card is a GTX 470 that gets shipped with a GTX 465's BIOS which means the owner of that card can just flash it to a GTX 470 and then tweak it a little bit so that it's comfortable being a GTX 470.
If a GTX 465 has 8 memory chips on it, then it is not a GTX 470 and therefore it will not accept a GTX 470's BIOS. In other words, if a GTX 465 has 8 memory chips, then it is not "unlockable".
But even if it has 10 memory chips, the GPU itself still has to be a true GTX 470. Fortunately, the vast majority of these Golden Edition cards have a true GTX 470's GPU on the card in addition to the 10 memory chips.
So, MSI 465 TF2 GE №1126 isn't unlock