That traversal coprocessor thing sounds pretty rad and believable. Considering that RT will be ubiquitous in the near future and that it does need huge amounts of dedicated processing it just makes sense to offload it from the main chip. It offers flexibility for the die size and for users who couldn't give a crap about RT for some reason. It also fits with the rumor that the 3090 will have a whooping 350W TDP, which would make sense if it sports a huge processing chip and another one dedicated for RT on the back, which then also would fit the weird double sided fan rumor. It might also be the first step for RT expansion cards in the future.
If this rumor is true I would imagine that the double sided design is exclusive to 3090 cards with all others sporting regular chips with RT cores on the die.
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