Finding a Ryzen 7 9800X3D in stock from a reputable vendor is proving the quite the challenge, as pent-up demand for AMD's newest generation processor with 3D V-Cache saw a flurry of sales deplete whatever initial inventory retailers might have had at launch -- it's sold out practically everywhere. It should come as little surprise, then, that it cracked Amazon's list of best-selling CPUs. What might come as a bigger surprise to some (or not) is that whittling the list down the top 10 best sellers, it's an all-AMD affair.