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AMD has the pieces, they ship a Xbox version, PS5 version, the sTRX4 socket for the threadripper, and for any of their chiplet products the IOD would be the onl
by sliken 3y ago
AMD has the pieces, they ship a Xbox version, PS5 version, the sTRX4 socket for the threadripper, and for any of their chiplet products the IOD would be the only changed piece of silicon. Any updates could be amortized over their pending threadripper upgrades (4 channel), sienna products (6 channel), or threadripper pro (8 channel).
Much like how Apple sells 128 bit wide (mini and mba), 256 bit wide (m1/m2 pro), 512 bit wide (m1/m2 max), and 1024 bit wide (m1/m2 ultra).
I think the desktop/laptop vendors would have jumped at a nice iGPU/APU when they couldn't get normal GPUs.
Obviously AMD agrees, they shipped the PS5/XboxX and have a 256 bit wide APU planned for 2024. Just way later than I had hoped.
- rbanffy 3y agoThe big reason why parallel memory buses aren’t wider is pin count. If you have all the memory interfaces over the substrate, the bus can be as wide as the substrate can accommodate. BTW, what is the usual width of memory buses in discrete GPUs?
- sliken 3y agoIt boggles my mind that apple can do 128 bit, 256 bit, and 512 bit wide memory interfaces on thin/light laptops that are price competitive with PC laptops in the same segment while having excellent battery life. In the previous gen even a relatively low end card like the 3060 Ti has a 256 bit wide memory interface. In the current generation the 4070 (which is a higher in the product stack) is 192 bits. The RTX 3080 (prev gen) is 320 bits wide the 4080 (current gen) is 256 bits. Generally the trend is more cache, less width, and less bandwidth. Which is great ... for things that are cache friendly, but not everything is.