I would love to see a Ryzen with 1GB of L3/L4, they have enough room on the socket todo so. With this chiplet design, it opens up options.
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AMD Announces EPYC 7532 + EPYC 7662 As Newest Rome Processors
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Originally posted by starshipeleven View PostYes it is easier but it's kind of retarded to disable cores and sell the part for cheap when you could NOT disable the core and sell this CPU for A LOT more as a mid/high end part. AMD CPUs are literally flying off the shelves in server market at the moment, and that takes priority over cheaper parts.
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Originally posted by wizard69 View Postso I’m wondering why do you want fewer cores, it makes no sense to me.
Another motivation is "per core" licensing model of highend engineering software. You pay 20k for a workstation and that's just a rounding error of a license cost ...
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Originally posted by wizard69 View Post
There is no incentive to hold back. The cores in these processors are not as power hungry as some might imagine. Caches on the otherhand are very power hungry and as such are limited in size to keep power in check.
so I’m wondering why do you want fewer cores, it makes no sense to me.
For instance, a ZFS-based storage server that's exporting volumes via iSCSI doesn't need a lot of CPU cores, but it does need a lot of PCIe lanes for disk controllers, and possibly RAM for cache. The 8- and 16-core versions of the EPYC CPU are perfect for this (and if they come out with a 16-core Threadripper 3000, that could work as well).
Same for an NFS server.
A server that does a bunch of number crunching on GPUs would need a lot of PCIe lanes and possibly RAM, but doesn't need a lot of CPU cores to manage the data flow.
Not everything needs a 64-core CPU.
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Originally posted by wizard69 View PostThe bigger issue is that disabling cores isn’t a huge impact on overall thermals.
Disabling cores due to defects is another thing but AMD doesn’t seem to offer a lot of variants due to defective cores. It is probably easier for them to simply sell the defective chiplet as a consumer part than to muddy the Rome lineup. It would be very interesting to know what is actually happening but I get the feeling that yields are very good.
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Originally posted by phoenix_rizzen View PostNot everything needs a 64-core CPU.
And yeah, they will be selling these things left and right, people on servethehome for example all have massive hard-ons about these processors, so expect to get stupid cheap 64-core CPUs in a few years while high end ones get a few hundreds.Last edited by starshipeleven; 19 February 2020, 06:39 PM.
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Originally posted by starshipeleven View PostUmmmmmmm.... I think it was more that modern stuff is very miniaturized so charged particles have an easier time changing component state or punching holes, while affecting larger, heavier and dumber components requires more energy because they are simply bigger.
Older chips are actually very much larger in surface space (at the same relative performance), they are printed at 80nm or even bigger process nodes.
For punching holes you need to have the right kinetic speed and charge state otherwise there will be not enough ion-matter-interaction to dump the thermal energy for a hole (bragg-peak). This is only valid for charged ions but it is also the only particle which is "strong" enough and available in high quantity up there. But yes this is also a critical mechanism which has to be considered for space electronics....good old tubes
Originally posted by starshipeleven View PostYeah. Cache is usually designed as a modular bunch of smaller cells that can be disabled independently so you can minimize the amount of cache lost for every defect.
Otherwise having a single defect in the cache block would mean you have to disable the whole block so you end with some cores that have no attached L1/L2/L3 cache, that's insane, you are trashing that core's performance.Last edited by CochainComplex; 20 February 2020, 07:54 AM.
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Hopefully, there will also be a 7662P as a "reasonably" priced alternative for people who are discontent with the TR 3990X effective 256 GB memory limit.
Originally posted by MrEcho View PostI would love to see a Ryzen with 1GB of L3/L4, they have enough room on the socket todo so. With this chiplet design, it opens up options.
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Originally posted by starshipeleven View PostAnd yeah, they will be selling these things left and right, people on servethehome for example all have massive hard-ons about these processors, so expect to get stupid cheap 64-core CPUs in a few years while high end ones get a few hundreds.
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