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Re:Apple M1 Max Geekbench Score by jchw on Wednesday October 20, 2021 @02:26PM (#28934158)
People are probably going to be reading your comparison as an objective comparison rather than an opportunistic one. For example, if you are choosing between upgrading AM4 processors on your desktop versus buying a new Macbook Pro, then of course it makes sense to compare the cost in those terms. However, the price of the M1 chip is obviously probably not that bad. Since you can’t meaningfully buy it on its own, I guess there is no fair comparison to make here anyways.
Re:Apple M1 Max Geekbench Score by mhh__ on Wednesday October 20, 2021 @02:29PM (#28934224)
The M1 chip is actually probably extremely expensive. The top of the line one is literally 60 BILLION transistors!

My current machine has like 10 billion (GPU + CPU)

Re:Apple M1 Max Geekbench Score by jchw on Wednesday October 20, 2021 @03:59PM (#28935559)
60 billion is obviously a metric ton, but 10 billion is not that ridiculous for an SoC to clear; there are snapdragons at higher transistor counts. The AMD 5950X clears 19 billion, and it is just a CPU with no GPU or integrated RAM. I’ve got to guess the M1 transistor count is inflated a fair bit by RAM.

I suppose it’s not likely we’ll know the actual price of the M1, but it would suffice to say it’s probably a fair bit less than the full laptop.

Re:Apple M1 Max Geekbench Score by smiley1437 on Wednesday October 20, 2021 @04:47PM (#28936312)
Not sure if these numbers can believed, but apparently a 300mm wafer at the 5nm node costs about $17000 for TSMC to process

https://www.tomshardware.com/news/tsmcs-wafer-prices-reveale...

Since the M1 is 120 mm2 and a 300mm wafer is about 70695 mm2, you could theoretically fit 589 M1 chips on a wafer.

Subtract the chips lost at the edge and other flaws, you might be able to get 500 M1 off a wafer? (I know nothing about what would be a reasonable yield but I'm pretty sure a chip won't work if part of it is missing)

Anyways, that would be $17000/500, or $34 per M1 chip - based just on area and ignoring other processing costs.

Re:Apple M1 Max Geekbench Score by hajile on Wednesday October 20, 2021 @05:47PM (#28937182)
The M1 Max is slightly off-square and 432mm^2. 19.1 x 22.6 seems like a decent fit.

TSMC has stated that N7 defect density was 0.09 a year ago or so. They have also since stated that N5 defect density was lower than N7.

Let's plug that in here https://caly-technologies.com/die-yield-calculator/

If we go with a defect density of 0.07, that's 94 good dies and 32 harvest dies. At 0.08, it's 90 and 36 respectively.

If we put that at 120 dies per wafer and $17,000 per wafer, that's just $141 per chip. That's probably WAAAYY less than they are paying for the i9 chips in their 2019 Macbook Pros.

For comparison, AMD's 6900 GPU die is 519mm^2 and Nvidia's 3080 is 628mm^2. Both are massively more expensive to produce.

Re:Apple M1 Max Geekbench Score by smiley1437 on Wednesday October 20, 2021 @07:16PM (#28938105)
thanks for the link to the die yield calculator, very handy!

And I agree - Apple making their own chips is sure looking good for their bottom line vs buying from Intel

Re:Apple M1 Max Geekbench Score by Osiris on Thursday October 21, 2021 @04:04AM (#28941679)
Exactly. For me, I can upgrade my existing desktop by spending $560 on a Ryzen 5900X. I have all the other parts so there's no additional cost.

I also don't need portability nor a fancy display because I use all external monitors and keyboard/mouse. Fan noise is irrelevant because I wear noise cancelling headphones.

For me, it's not worth spending the $2500 on a MacBook when I can get similar/better performance with a much cheaper upgrade.