Silly question: what constrains cache sizes? What prevents just making them bigger and bigger?
More cache means slower read/write operations to it, and less transistors for other things.
AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
71–80 of 221 posts
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#72> To make sure gaming workloads find the right CCD, AMD has implemented a high degree of software-level control, in the form of its 3D Vertical Cache Optimizer Driver, which is included with the latest version of AMD Chipset Software. This driver ensures that workload from games are directed to the CCD with the 3D Vertical Cache using dynamic "preferred cores" flagging for the Windows OS scheduler. Yeah, what about g…
I already do this by hand with `taskset` when it's important. I would totally exploit this asymmetry.
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#73I wish the 64 core Threadrippers were still available for a decent price for HEDT, it's all Epyc or Threadripper Pro which are much more expensive for minimal increase in power over the 3990x.
RIP threadripper workstations support.
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#74The inflation has really hit the consumer market... 700$ for CPU and over thousand for GPU... Memory is not cheap either... Not that it won't sell, but still these price points for something still called consumer start to be high. You could get a whole portable PC for same money.
I think the worst part is not the high flagship price. It’s that prices don’t fall for generations the same way they used to.
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#75Earlier quoted context omitted.
What driver is responsible for assigning specific games to specific CPU CCDs? Is this a real thing? Is it available on Linux? Or am I sticking with Intel?
It's the CPU scheduler. You can easily avoid this by just not buying an X3D variant. Recent Intel CPUs can have the same problem where processes get assigned to the efficiency cores instead of performance cores if the right scheduler isn't used (like by using Windows 10 or an old Linux distro without explicit support)
Or buy an X3D that's homogeneous, like the 5800X3D or upcoming 7800X3D.
I have no idea why AMD made the 7950X3D be this weird 50/50 split. Why not make both CCDs have 3D V-cache and make it the true halo part it should be? Then cut costs with the 7900X3D?
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#76Earlier quoted context omitted.
It's the CPU scheduler. You can easily avoid this by just not buying an X3D variant. Recent Intel CPUs can have the same problem where processes get assigned to the efficiency cores instead of performance cores if the right scheduler isn't used (like by using Windows 10 or an old Linux distro without explicit support)
And there's actually a list of blessed processes in the scheduler?!
Kinda. It's more like "if windows game bar shows up -> restrict to cores 0-7"
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#77Do we have an easy to find brand/line with ECC memory at reasonable prices yet?
I don't know what reasonable prices are to you, but PCPartPicker can answer your question: https://pcpartpicker.com/products/memory/#E=1,11 Filter for the memory amount and prices that work for you.
You could have at least chosen a set of filters restricted to memory that's actually compatible with the CPUs under discussion: requiring DDR5, and only supporting unbuffered DIMMS. The correct filters are: https://pcpartpicker.com/products/memory/#E=1&b=ddr5
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#78[flagged]
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#79Earlier quoted context omitted.
It's the CPU scheduler. You can easily avoid this by just not buying an X3D variant. Recent Intel CPUs can have the same problem where processes get assigned to the efficiency cores instead of performance cores if the right scheduler isn't used (like by using Windows 10 or an old Linux distro without explicit support)
Or buy an X3D that's homogeneous, like the 5800X3D or upcoming 7800X3D. I have no idea why AMD made the 7950X3D be this weird 50/50 split. Why not make both CCDs have 3D V-cache and make it the true halo part it should be? Then cut costs with the 7900X3D?
The added cache isn't free; the CCD with vcache runs at a significantly lower clock speed. If every task was always put on the most appropriate CCD, the heterogeneous approach is pretty much a direct advantage, as frequency-sensitive workloads get high frequencies and cache-sensitive workloads get lots of cache.
Whether it will ever get good enough at picking CCD remains to be seen though.
Re: AMD releases a new flagship CPU for consumer market with 128M of L3 Cache
#80Earlier quoted context omitted.
It's the CPU scheduler. You can easily avoid this by just not buying an X3D variant. Recent Intel CPUs can have the same problem where processes get assigned to the efficiency cores instead of performance cores if the right scheduler isn't used (like by using Windows 10 or an old Linux distro without explicit support)
Or buy an X3D that's homogeneous, like the 5800X3D or upcoming 7800X3D. I have no idea why AMD made the 7950X3D be this weird 50/50 split. Why not make both CCDs have 3D V-cache and make it the true halo part it should be? Then cut costs with the 7900X3D?
So they can sell us a 7990X3D 6 months down the line for $1000