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I do wonder if the days of dimms and long lived sockets of AM4 is over. AM4 maxes out at DDR4-3200 x 128 bit = 50GB/sec and more importantly just 2 pending cac
by sliken 5y ago
I do wonder if the days of dimms and long lived sockets of AM4 is over. AM4 maxes out at DDR4-3200 x 128 bit = 50GB/sec and more importantly just 2 pending cache misses. A bit more with overclocking, but not much.
Apple M1 = 128 bit x LPDDR4X-4266 = 68GB/sec and I believe 8 memory channels (8 pending cache misses). A modest core count (4 fast + 4 slow) helps keep the memory bandwidth from being a bottleneck.
The M1 pro doubles this to 256 bits, 16 channels, and 200GB/sec, which is a significant help for the integrated GPU and hits levels that AMD APUs can not match.
M1 max doubles again to 512 bits, 32 channels and 400GB/sec.
M1 ultra doubles again to 1024 bits, 64 channels, and 800GB/sec.
Not sure AMD can really compete and the APUs are severely limited by memory bandwidth, unless you buy a PS5 of XboxX. I'm hoping that AMD takes a page from the Apple playbook and ships a consumer CPU with dramatically more bandwidth and allows users to skip the current curse of discrete GPUs that run hot, are not available at MSRP, and are hard to get even at 2x MSRP.
- bick_nyers 5y agoI think you would find an APU that powerful would suffer the same fate as discrete GPUs in that it would be low-stock and/or expensive. Same thing with the M1 Ultra, starts at $2k it looks like
- sliken 5y agoDunno. Mining is all about hashrate/$ and scalpers are all about the % profit. Seems like AMD could easily make today's APU with 2x the bandwidth (less than 1/5th of the Apple Studio/M1 max) make a tidy profit and provide 2x the APU performance and make the APUs a good fit for a much larger fraction of the GPU intensive applications. Not like they aren't shipping by the millions in the XboxX and PS5, there's obviously a demand for them and AMD is obviously capable of making them (they make the CPU in both).