AMD Radeon RX Vega in short supply due to low packaging yield rates?

AMD's Radeon RX Vega 64 launched about ten days ago but there's still a lot of controversy about the supply and especially the high pricing. DigiTimes contacted its sources in the upstream supply chain and got to hear that the insufficient supply of Vega cards is caused by low packaging yield rates.

The Vega 10 GPUs are manufactured on a 14nm process by GlobalFoundries and are then integrated with HBM2 chips from Samsung and SK Hynix. The packaging is reportedly handled by ASE using the SiP technology. It's not exactly clear what the problem is, some sources claim its a problem with ASE's packaging technology while others point out that it's the HBM technology that makes production too complex:

Some sources pointed out that Vega's design of integrating high bandwidth memory (HBM) into the GPU has significantly raised the difficulty of the related packaging process and hence resulted in low yield rates. However, some other sources claimed that the issue may be down to problems with Advanced Semiconductor Engineering's (ASE) packaging technology.

Shortages of Vega could last until October. DigiTimes also claims that NVIDIA is not in a rush to roll out Volta-based gaming GPUs, this is now reportedly scheduled for Q1 2018.