If AMD can make a product similar to the RX580, with 10%+ of performance and shave a few dozen watts for 249$, that might get some success in the market today for those not wanting 2nd hand Pascal\Polaris for very attractive prices.
Memory bandwidth throughput is memory bandwidth throughput. It does not need calculations, multiplier or anything else. Never did.
I just put it here so w1zz could fix it. That's all. Basically what @Assimilator said
This is rich. I'm feeling to risk a forum ban just to express my opinion on this, but ill behave and tell you that these DIMMs are just pulled from possibly Toshiba laptops. You can clearly see the stickers and icons on the chips pointing to micron, samsung and hynix as manufacturers.