G.Skill introduces the first DDR5 kits with a CAS latency of less than 30 milliseconds.

I think there is an error. CAS is measured in cycles.
So the title should be "G.Skill introduces the first DDR5 kits with a CAS latency of less than 30 cycles"
But if we want that latency in time, 5600MTs at CAS 28, results in 10ns.

 

Its going to be interesting to see where DDR5 is when Zen 4 gets here. AMD is promising interesting things when it comes to RAM overclocking, kind of hoping its not just hype.

 

It will be faster and cheaper.

 

Lol, an old hard-disk seeks in less than 15 milliseconds.

Did anyone actually read this title before it was published?

 

It's all nice but thhe cost is crazy,especially when late ddr4 is really good in terms of price to performance.
6400 c32 kits is where things start to get interesting and ddr4 is clrearly starting to fall behind.
now go check how much these are.

ddr5 is for enthuisiast rigs,no one who wants to get a 200-300eur cpu wants to have to drop 400 eur on memory.

 

Dont you remember when ddr4 kits costed the same? 16gb 3200 was like 300eur when haswell-e landed.

 

I'm more interested in if AMD can take advantage though. Imagine if AMD and Intel trade places on RAM compatibility where Zen 4 is the leader when combining high frequency and low latency? I could get used to AMD and Intel trading blows.

 

yup that's what im talking about
early ddr adopters slways get suckered
ddr4 was poor value up until 3200 started to get decent pricing when 8700K launched

at this point the absoulte cheapest ddr5 i'd be interested in is 300eur,and it's 6000 c40 kits that only perform well when overclocked.
meanwhile,ripjaws 4400 c19 is 156eur.
tuned vs tuned you're going to see a couple of percent difference at best,with lower resolution and a high end card with both running super high amounts of fps.
this goes for 140eur
https://geizhals.de/g-skill-ripjaws-v-schwarz-dimm-kit-32gb-f4-4000c18d-32gvk-a2458629.html

lol if people still get ddr5,unless they're enthusiasts and they know they're practically throwing money away cause this in 1:1 mode will match most mid-range ddr5 like 5200,5400 or 5600.

not only does ddr5 need to drop in price,to get to acceptable levels of price/performance intel and amd need to get their current cpus to do 5200/5200 is 1:1 mode.They're only 1200mhz away from that goal at this point so good luck,you'll need +6000mhz sticks with low latency to compensate for the 1:2 mode.

it was never a good deal to run ddr4 in 1:2 mode,ever,why would it be now when it costs you twice to get ddr5 over ddr4.

 

I’m so old that I remember buying and using CAS 2, Lower the cas, tighter timings ALWAYS made any system run faster than just super high mz frequency. Seeing CAS 28 and more makes me laugh, it’s so HIGH!

 

28 is super low for ddr5
mainstream kits are 36-40

 

Frequency is so high with these that latency comes second.

 

Love how people are always cracking on DDR5. Yes, its expressive but if u do the math DDR5 @ 5600 c28 is 10ns so it's the same as DDR4 @ 3200 c16 just like DDR5 6400 c32 is 10ns. Just like I'm running 6000 c30 so same latency with almost twice the frequency of 3200 c16. Anyways that is my two cents for the day.

 

The real latency in ns remains more or less the same between DDR generations, it seems. So, sequential transfer would greatly benefit from the high frequency, but random access delay would remain the same. At least in theory. Maybe there are some other factors with how the CPU predicts stuff and in the logic within the RAM modules themselves. They could be getting better from generation to generation.

 

This is why I bought 5800x3d. I'll wait for DDR5 to mature another year

 

the jedec standard is definitely looser this time around, "tight" jedec is usually 10-12.5ns, going back as far as ddr
with ddr5 the tightest jedec is ~14ns.

frankly, given the amount of cache cpus have these days, it just doesnt really matter all that much. but there is defintitely a trade off being made design wise.

 

Why is this presented as some kind of innovation when it's actually still just bad? Good DDR4 - like the one I use right now - can reach 3600Mhz CL14, or ~7.7ns.

With most software written today being completely ignorant of the hardware and practicing terrible memory access patterns, latency is the #1 thing we need to improve, not bandwidth.

On that note, it would be super cool to see a CPU with integrated RAM.

 

30millisecond, do those contain magnetic hard disks? i think is 30 clock cycles

 

Because none from a marketing department will say " come buy people we are still behind in latency compared to ddr 4 "

 

checked what I could actually buy here :
G.Skill
F5-6400J3239G16GX2-TZ5RK
DDR5-6400 32-39-39-102 2x16Gbs
607.50€ or 640$