Article: AMD's Mobile Strategy
By: Ricardo B (ricardo.b.delete@this.xxxxx.xx), January 4, 2012 5:29 pm
Room: Moderated Discussions
Bill Henkel (noemail@yahoo.com) on 1/3/12 wrote:
---------------------------
>Ricardo B on 12/31/11 wrote:
>> if the L4 is going to be SRAM (although such huge sizes are not
>> realistic for SRAM) and you need a separate die for the L4 models, it
>> would be better to put the L4 cache itself the same die as the CPU.
>
>The cache chips could be SRAM with 32 MBytes per chip. I don't think its possible to put 8 * 32 MBytes = 256 MBytes
>on the processor die any time soon.
True, a single 32 MB SRAM would be some 500 mm², making a huge chip by itself.
Putting 8 of those in a single chip is simply not possible with.
However, even spread by 8 chips, that a lot of sillicon and a lot of power· That's why I said that 256 MB of SRAM cache isn't feasible right now.
Even IBM had to bite the bullet and use eDRAM as off-chip L3 cache in their POWER systems.
---------------------------
>Ricardo B on 12/31/11 wrote:
>> if the L4 is going to be SRAM (although such huge sizes are not
>> realistic for SRAM) and you need a separate die for the L4 models, it
>> would be better to put the L4 cache itself the same die as the CPU.
>
>The cache chips could be SRAM with 32 MBytes per chip. I don't think its possible to put 8 * 32 MBytes = 256 MBytes
>on the processor die any time soon.
True, a single 32 MB SRAM would be some 500 mm², making a huge chip by itself.
Putting 8 of those in a single chip is simply not possible with.
However, even spread by 8 chips, that a lot of sillicon and a lot of power· That's why I said that 256 MB of SRAM cache isn't feasible right now.
Even IBM had to bite the bullet and use eDRAM as off-chip L3 cache in their POWER systems.
