The specs for Nvidia's RTX 4080 GPUs simply don't add up.
Since when did a top-tier GPU beat a lower-tier model for pure bang for buck? Since never.
Put it this way, the cost in dollars per shader, per GB of VRAM, and almost certainly per ROP, per texture unit, and per everything once the full specs are released, is lower for the RTX 4090 than the RTX 4080. Okay, you could argue that one way to fix all this would be to simply tweak the branding. The RTX 4080 12GB is misbranded and should be, at most, an RTX 4070 or even an RTX 4060. Let's be generous and call it an RTX 4060 Ti. But that doesn't solve the value problem.
Hard to believe, but the RTX 4080 12GB has fewer shaders than the RTX 3080 and a much narrower memory bus. According to the best information we have, it will probably have fewer ROPs and fewer texture units, too. Yes, it has a much higher clock and Ada Lovelace's shader cores aren't directly comparable. But here's the rub.
And in that knowledge, Nvidia thinks the RTX 4080 is good enough. Let's be clear, the AD102 GPU in the 4090 is one heck of a chip. If the RTX 4080 was based on that chip, just as the RTX 3080 was based on the big Ampere GPU, then this would all be very different. So, it's not that Nvidia has been caught off guard or failed in technological terms. It had the option of a much faster RTX 4080, but it chose a massively hobbled GPU at megabucks pricing.
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