XFX Confirms, unlocking might also be possible
The AMD Radeon RX 480 in 4GB flavor is the least expensive version of AMD’s Polaris 10 graphics card, touting a 4GB VRAM instead of 8GB to make up for its price. Now news are circulating that some early retail versions of the RX 480 4GB variant actually features 8GB of VRAM, meaning that for less, you could get your 4GB RX 480 running with an 8GB of VRAM capacity, together with of course, an upgraded memory bandwidth at 8Gbps.
According to WCCFTech, XFX confirms this on their end. Not the unlock possibility, but the inclusion of 8GB VRAM chips on their 4GB reference models. Even WCCFTech checked it for themselves, confirming that their 4GB XFX RX 480 actually features 8GB of VRAM with 8 memory chips surrounding the GPU die with 1GB of capacity each.
As for unlocking, the media samples of the RX 480 actually features a BIOS switch to easily check out the differences between the 4GB and 8GB versions of the card with just a flick of a switch. Suffice to say, the press received an almost identical card with the retail ones only losing the switch. This in turn could possibly mean that someone – with enough experience – could potentially save the firmware of the 8GB version, and have an XFX RX 480 flashed to unlock the card’s potential. Risky potential right there.