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v-cache and HBM are two entirely distinct technologies, there are currently no products that use both and there are not even any rumors of any products that wou
by Tuna-Fish 4y ago
v-cache and HBM are two entirely distinct technologies, there are currently no products that use both and there are not even any rumors of any products that would use both.
v-cache is AMD:s branding for attaching additional SRAM cache directly on top of the die using TSMC hybrid bonding, HBM is a JEDEC standard for DRAM. They have literally nothing to do with each other.
- sitkack 4y agoThat makes v-cache that much more impressive. Do you know if the GPU cores will be able to read directly from v-cache?
- Tuna-Fish 4y agoIn Raphael (the cpus that were just launched) the GPU is a tiny, weak one that's sitting on the IO die, while the v-cache chip is integrated on top of the main CPU die. I would suspect that it can't make any use of it, not that it would benefit much because it just doesn't have the compute power. It's really only intended to make the CPUs able to do basic desktop work without a separate GPU. AMD currently has no published big APUs that would use v-cache, but many enthusiasts, including me, have noted that if they made one and allowed the GPU to share the last-level cache, it would potentially be a very compelling product for mobile. Who knows when/if they make one. They do have upcoming discrete GPUs which are rumored to optionally contain v-cache (RDNA3, probably released as Radeon RX 7000).