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Will we get performance increases, and how big will they be in the average case, not for some specific codes with low cache hit ratio on large datasets, and attributed solely to bandwidth increases and not architecture IPC improvements?
Yeah, but to the casual user like me, that's going to help with load times... go from 2 seconds to 1 second.
Earlier quoted context omitted.
That reminds me, I was going to buy a PS4.
The PS5 can play PS4 games so it would be a worse financial decision I guess
Also factor in that it usually takes a few years until the full potential of a platform it tapped, so the PS4 in it's prime days for games.
https://www.nextplatform.com/2020/09/03/the-memory-area-netw...
"the shift from dedicated DDR4 memory controllers to Serdes-based, high speed differential signaling mixed with buffer chips on memory modules that can be taught to speak DDR4, DDR5, GDDR6, 3D XPoint, or whatever, is an important shift in system design and one that we think, ultimately, the entire industry will get behind eventually."
Will we get performance increases, and how big will they be in the average case, not for some specific codes with low cache hit ratio on large datasets, and attributed solely to bandwidth increases and not architecture IPC improvements?
Depends a lot on your CPU's architecture as well as workloads, how far ahead it prefetches vs how often it's stalled on large memory reads. So it's hard to know. e.g. Zen+ (Ryzen 2000) was seeing 10% in some gaming workloads going from DDR4-2400 to DDR4-3600, but it's much less drastic on Intel CPUs or even Zen 2 (Ryzen 3000) because the memory controller is smarter so the slower RAM is less of a detriment. And then…
There is no telling what the memory controller -> ram ratio will be with ddr5, the memory controller has speed limits, so you aren't going to get free speed just because the dr5 starts at 4800, because the zen memory controller can't run that fast anyway.
When will this be available with AMD? I'm currently shopping for a new build, and willing to wait 6 months or so, but beyond that I'm not sure ...
[0]: https://twitter.com/AMDRyzen/status/1312080706739339266?
[1]: https://www.amd.com/en/events/gaming-2020?sf238352749=1&sf23...
I like what IBM has done with their latest power chip - effectually made the whole memory interface upgradable. https://www.nextplatform.com/2020/09/03/the-memory-area-netw... "the shift from dedicated DDR4 memory controllers to Serdes-based, high speed differential signaling mixed with buffer chips on memory modules that can be taught to speak DDR4, DDR5, GDDR6, 3D XPoint, or whatever, is an important shift in syste…
There's speculation that AMD is going to do the same - in Zen 2 and later designs the CPU chiplets are coupled with different IO dies depending on the design (Ryzen, Threadripper, Epyc), and swapping out the IO die for one that has support for new/different memory types would less work than taping out a whole new monolithic CPU.
I'm happy that I put off upgrading my pc long enough to skip a RAM generation.
I have a 4690K and my RAM is a 32GB EVGA DDR3 ram that I suspect was made by hynix or the other manufacturer of fast rams, that runs at speed up to par with the slowest DDR4 but with DDR3 latency, it is very awesome. I wonder if DDR5 will be fast enough to compensate for the slower latency (or maybe they improved latency this time?) To be honest I didn't felt yet any need to move off my current machine, I would only…
Earlier quoted context omitted.
The PS5 can play PS4 games so it would be a worse financial decision I guess
Depends upon what you pay - certainly the second market will see a surge and drop in prices. If you can tech on top end 5 years later, it's not that bad and sure wallet friendly. Also factor in that it usually takes a few years until the full potential of a platform it tapped, so the PS4 in it's prime days for games.