What news I have seen says that RDNA 2.0 will ship with the largest and most power-hungry models first (Navi 21) with the models suitable for "general-purpose" desktops and laptops (Navi 22 and 23) shipping later (possibly late 2020, but 2021 sounds more likely).
This tracks with all the rumors that late model RDNA 1.0 will ship with the 2020 iMac (be it Mid-2020 or Late 2020) because that is all that will be available - plus it's all that will physically fit. Plus Navi 21 is going to be a "compute" GPU and not a "general purpose" GPU so it makes far more sense to put it in the iMac Pro and the Mac Pro and then with the 2021 refresh put the more appropriate Navi 22 and 23 GPUs in the iMac and MacBook Pro refreshes (perhaps with Rocket Lake if Intel can actually ship it in 2021).
As to whether or not we will get only one model of "new form factor" iMac available at WWDC and what size it will be, if true then I think it could be the ~24" model since it could have 9th Generation Intel CPUs and mobile RDNA 1.0 (Navi 14 for sure and maybe Navi 10) which would help make it "cheaper" as rumored.
If Apple is planning to launch a 27" iMac in the "new form factor", I could see it being delayed since it will very likely use 10th Generation Intel CPUs and those are just starting to enter the channel. Coupled with higher-end RDNA 1.0 (Navi 10) desktop GPUs, there could just be a parts delay forcing Apple to push it back a bit and it just isn't ready to ship in volume at WWDC.
The above being said, Apple could still announce both, with the ~24" "Available Now" (after keynote) and the 27" available "later this Summer".
This tracks with all the rumors that late model RDNA 1.0 will ship with the 2020 iMac (be it Mid-2020 or Late 2020) because that is all that will be available - plus it's all that will physically fit. Plus Navi 21 is going to be a "compute" GPU and not a "general purpose" GPU so it makes far more sense to put it in the iMac Pro and the Mac Pro and then with the 2021 refresh put the more appropriate Navi 22 and 23 GPUs in the iMac and MacBook Pro refreshes (perhaps with Rocket Lake if Intel can actually ship it in 2021).
As to whether or not we will get only one model of "new form factor" iMac available at WWDC and what size it will be, if true then I think it could be the ~24" model since it could have 9th Generation Intel CPUs and mobile RDNA 1.0 (Navi 14 for sure and maybe Navi 10) which would help make it "cheaper" as rumored.
If Apple is planning to launch a 27" iMac in the "new form factor", I could see it being delayed since it will very likely use 10th Generation Intel CPUs and those are just starting to enter the channel. Coupled with higher-end RDNA 1.0 (Navi 10) desktop GPUs, there could just be a parts delay forcing Apple to push it back a bit and it just isn't ready to ship in volume at WWDC.
The above being said, Apple could still announce both, with the ~24" "Available Now" (after keynote) and the 27" available "later this Summer".
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