Some will be 64-bit, some 128-bit
We found out a rather interesting piece of information regarding the rebranded entry-level GT 620 graphics cards and it appears that not all cards on the market will be the same.
We started asking questions about it when we saw the specification list on Nvidia's website for the GT 620, we realized they are not exactly the same as the GT 430 and some GT 620 graphics cards that were already launched by some Nvidia partners. We thought that it is a simple mistake but the situation seems much worse.
Apparently, some GT 430 graphics cards that partners currently have on stock will get a new shiny box and a BIOS flash. The original GT 430 was based on the GF108-300 chip with a 128-bit memory interface but the new chip will be GF108-100 and will feature a 64-bit interface. To make things worse, both should hit retail/e-tail at similar date so it will be hard to differentiate which chip you get unless you take a closer look at the box.
The similar situation is with the GT 630 that will get a new chip as well. The old GT 440 was based on the GF108-400 with DDR3 and GDDR5 support paired up with a 128-bit memory interface, while the new one will be GF108-401 that will only feature DDR3 support. However, this is not a big deal since you are practically getting almost same specs, unless you are going for GT 630 with GDDR5 memory.
The GT 610 will get a plain old BIOS flash, new box and will use the same GF119-300 GPU found on all GT 520 graphics cards.