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> Apple doesn't have on-die memory. AMD is the only company to have shipped on-die memory to consumers What distinction are you drawing such that Fury X interp
by paulmd 3y ago
> Apple doesn't have on-die memory. AMD is the only company to have shipped on-die memory to consumers
What distinction are you drawing such that Fury X interposers count as “on-die memory” but apple’s literal stacking of the LPDDR on the actual die doesn’t?
Apples technique is more advanced than fury actually: fury is just on-package, not on-die, but apple is literally doing v-cache style stacking of the whole memory subsystem right on top of the die.
Of course fury x was earlier, but die stacking is a more advanced technology, there is a reason AMD didn’t do that for 5+ years after fury x. And apple actually beat AMD to market with on-die stacking, by several years (epyc v-cache was 2022 or 2021) with a more advanced implementation (the whole memory subsystem rather than just v-cache).
- wmf 3y agoThat's not how it works at all. Apple has nothing similar to V-cache.
- paulmd 3y ago> That's not how it works at all. What isn’t how what works? Use your words. (People literally are in such a race to pick a fight and defend their best friend AMD they forgot to make the rest of the post lol. Simply say the most mild thing and AMD people trip over themselves to do this stuff constantly, it’s funny.) Do you think OP is referring to something other than fury x/Vega when they said “gpu shipped to consumers”? That’s the only thing that comes to mind, literally there are only less than a half dozen consumer gpus from AMD in the stacking era so I don’t know what else it would be. If you mean true memory in the die, not stacked, not just a cache - AMD has never shipped that to consumers (or professionals) in a gpu. Nobody puts memory in the gpu because it would be a waste of die space. But like, gotta defend AMD, better hammer that downboat and drop a pithy six-word/single-sentence reply. Social media is constantly seething with the AMD defense force looking for fights, gets super old. Like, it was literally less than 30 seconds from clicking post on my comment to seeing your debate determinating cliche. What fine discourse we have here.
- deleted 3y ago[deleted]
- paulmd 3y ago> Apple has nothing similar to V-cache. Thanks for the second sentence. AMD’s consumer gpus don’t use v-cache. Apple is using the same memory-on-package technique that fury x and Vega use. Rdna3 cache is not v-cache, just another flavor of mcm.
- wmf 3y agoNo, HBM on silicon interposer is not the same as LPDDR on an organic package. One's an order of magnitude faster than the other.
- undersuit 3y agoAFAIK Apple only uses a silicon interposer to connect the CPUs. The memory is on standard interconnects through the package like AMD's chiplet approach or the ancient Intel Clarksdale.
- kllrnohj 3y ago> but apple’s literal stacking of the LPDDR on the actual die doesn’t? There's pictures of Apple's silicon all over the Internet, didn't think to bother even looking at one? https://cdn.mos.cms.futurecdn.net/EWuFBHNeGSfhjJfoWFxL7D-1024-80.jpg.webp https://cdn.mos.cms.futurecdn.net/EWuFBHNeGSfhjJfoWFxL7D-102... It's very obviously not on die. On package maybe, but definitely not on-die. Since you're talking about die stacking i assume you're now talking about their "low end" phone parts. That's a quite different technology from V-cache, foveros, or even Apple's "UltraFusion." It's also not at all a unique technology to Apple, it's very common in the phone SoC space where power consumption is so limited that the thermal issues are mostly negated.