Originally Posted by primerib
Whoever replied to your query from MSI should've checked their resources better. The NX8400GS-TD512EH is a G98 chip as I own it and know first-hand.
Interesting. If you go to MSI's support page, you will see there are 2 part number for the NX8400GS-TD512EH (602-V116-040 and 602-V116-200). Maybe one has the G86 chip and the other the G98 chip (just speculation on my part).
I didn't have the part number for the one I was looking at, but I was able to provide the UPC so maybe they used that to determine the part number from that.