No, the board partners don't really have a say. Nvidia designs and fabs all the chips, which are then sold to the companies who put them on a PCB, design coolers for them, and sell them to us. There is flexibility in tuning and cooler designs, but architecturally everything is set in stone by the time anyone outside of Nvidia knows anything. Nvidia maintains tight secrecy even from its own partners. This has been reported by multiple tech outlets over the years. One example that has been provided is that partners don't even know how much they are allowed to charge for base models until Jensen is on stage announcing the prices to the world. It seems like all of this and more was enough to cause EVGA to quit producing Nvidia GPUs entirely.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…