Stock outs are occurring on certain models of GPU like AMD Radeon RX 580 (Asus, Sapphire, Gigabyte). This is due to the rampant demand of mining operations both small and large. Other high m/hs GPUS are unavailable as manufacturing can't keep up with demand.
What is the driving factor behind it you ask?
Simple, its the explosion in the price of Ethereum, admitted it has fallen off a cliff the past few days, but this high price is still driving GPU stock out even at $225.
With the expectation of the DAG file to increase to the point that 4GB Graphics cards will soon be obsolete for GPU mining purposes on ETH.
Therefore was can impute that GPU's with 6GB/8GB should only be bought if considering future resale price. AMD/Nvidea are also releasing new GPU's solely for mining so of course this might impact retail availability/resale as well.
Ethereum/Other Scrypt based currency prices drive shortages and supply/demand and pricing on each of these GPU's both New and Used on the Primary (Retail) and Secondary (Ebay/Amazon Reseller) marketplace. If this price shoots up to $400-$800 expect GPU shortages to occur again... If one has memory this occurred back when Bitcoin was GPU mined before ASIC took over.
I wonder what the Ethereum price point is at a basic level of Electricity for breakeven (in months) for home mining rigs that would lead to a glut of GPU's on the market. $100? $200?
Comment and Open up the Discussion guys, and dont forget to:-