This is a revised version of my previous question, because I wasn't very clear.
I want to know if there are any graphics chips out there that are better than the HD6570, but are roughly the same size as this chip, GDDR3, 2GB, and the same sort of
PCI-E configuration. I have a Gateway DX4860-EF11P, it has fairly good specifications, and if you need to see the specs of it, they're on google.
I really hope that there is something out there that is the same size and PSU as the HD6570, has 2GB of Video Memory, and is GDDR3! (preferably nVidia) a
There's not yet any such thing as DDR5 except as theoretical. GDDR5 and DDR5 are very different technologies and DDR5 probably won't be out until between 2018 and 2021 or thereabouts.
The motherboard has absolutely nothing to do with this. The video card has its own RAM soldered on its PCB. It's not like how your computer's memory is removable and needs to be upgraded, the graphics cards have their memory unlike system memory that is a separate component.
You're not buying any graphics chips, you're buying a graphics card. The card has its own memory that is attached to the card, so you don't need to worry about it, the type of memory that it has is simply a factor in memory bandwidth which in turn is a factor in performance.
As for PCIe, yes, it automatically adjusted based on your system and also the workload. For example, when you're not doing something graphically intense, many PCIe 2.0/2.1 and 3.0 cards will temporarily switch down to PCIe 1.0 even if your motherboard supports greater than PCIe 1.0 to decrease power consumption.