Ryzen 3000 vs 4000

[4K8KW10]

Very crude post.

"Current DDR4-4266 has 19-19-39". Not even really a valid statement, is it? It's binned by GSKILL at these timings with sufficient guardband, it's not any kind of industry standard. JEDEC currently don't offer standards anywhere near those speeds. Moreover, they offer tCAS 17 bins at those frequencies already. Not only that, tCAS and other primary sets aren't the only important timing parameter. Frequency and timings are intrinsically related, it comes down to how close one is able to close in the subset spacing from what MB vendors are setting - and also what the CPU is capable of. If you calculate column access time correctly, you'll notice that for every tCAS jump you need a 266MHz frequency increase to reach the same access time. Not exactly a huge jump in frequency.

What's your point? Do we need DDR5 or not? I say not.

 

[Silent_Scone]

What's your point? Do we need DDR5 or not? I say not.

I can't make an objective comment on something that isn't available to me yet...

 

[Vish Petrol]

If Ryzen 4000 only has minor improvements that don't result in any real performance gains then it may be worth implementing DDR5 even if it is initially slower like Intel did with X99.

 

[pastymuncher]

I just can't see DDR5 happening until they change socket, probably in 2021.

 

[4K8KW10]

I just can't see DDR5 happening until they change socket, probably in 2021.

Even then, it isn't certain as long as the option for HBM on an interposer exists as a viable replacement. https://en.wikipedia.org/wiki/DDR4_SDRAM

Successor
At the 2016 Intel Developer Forum the future of DDR5 SDRAM was discussed. The specifications were finalized at the end of 2016 – but no modules will be available before 2020.[58] Other memory technologies – namely HBM in version 3 and 4[59] – aiming to replace DDR4 have also been proposed.

 

[Beren]

HBM 3 would make a lot of sense for AMD when they change socket if the price is halfway reasnable, a 7nm+ APU with HBM3 would deal to the memory bottleneck of on board graphics and they have invested heavilly in interposer IP.

Obviously that is a guess of wildest proportions.

 

[Grim5]

From what I remember, it took a few years before ddr3 and ddr4 were able to reach speed and timings to pass the faster variants of the older generations of memory, so its probably not worth jumping onto ddr5 straight away as you'll likely have to upgrade the memory again if you don't want the CPU to be bottlenecked, especially with infinity fabric.

Yep that's about right, It may not be worth moving to DDR5 until 2021/2022

 

[Vish Petrol]

HBM 3 would make a lot of sense for AMD when they change socket if the price is halfway reasnable, a 7nm+ APU with HBM3 would deal to the memory bottleneck of on board graphics and they have invested heavilly in interposer IP.

Obviously that is a guess of wildest proportions.

Something like this would kill off a budget CPU+GPU combo build in the future.