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

Published by

Click here to post a comment for G.Skill introduces the first DDR5 kits with a CAS latency of less than 30 milliseconds. on our message forum
#6014555
https://forums.guru3d.com/data/avatars/m/248/248291.jpg
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.
#6014574
data/avatar/default/avatar02.webp
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.
#6014577
https://forums.guru3d.com/data/avatars/m/198/198862.jpg
nosirrahx:

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. 🙄
#6014579
https://forums.guru3d.com/data/avatars/m/196/196426.jpg
Lol, an old hard-disk seeks in less than 15 milliseconds. Did anyone actually read this title before it was published?
#6014580
https://forums.guru3d.com/data/avatars/m/282/282473.jpg
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.
#6014581
https://forums.guru3d.com/data/avatars/m/198/198862.jpg
cucaulay malkin:

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.
#6014582
data/avatar/default/avatar40.webp
Undying:

It will be faster and cheaper. 🙄
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.
#6014586
https://forums.guru3d.com/data/avatars/m/282/282473.jpg
Undying:

Dont you remember when ddr4 kits costed the same? 16gb 3200 was like 300eur when haswell-e landed.
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.
#6014597
data/avatar/default/avatar19.webp
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!
#6014602
https://forums.guru3d.com/data/avatars/m/282/282473.jpg
Six_Tymes:

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
#6014606
https://forums.guru3d.com/data/avatars/m/198/198862.jpg
Six_Tymes:

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!
Frequency is so high with these that latency comes second.
#6014615
https://forums.guru3d.com/data/avatars/m/272/272433.jpg
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.
#6014620
https://forums.guru3d.com/data/avatars/m/248/248994.jpg
Undying:

Frequency is so high with these that latency comes second.
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.
#6014633
https://forums.guru3d.com/data/avatars/m/72/72830.jpg
This is why I bought 5800x3d. I'll wait for DDR5 to mature another year
#6014648
https://forums.guru3d.com/data/avatars/m/266/266726.jpg
Kaarme:

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.
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.
#6014695
data/avatar/default/avatar34.webp
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.
#6014719
data/avatar/default/avatar08.webp
30millisecond, do those contain magnetic hard disks? 😀 i think is 30 clock cycles
#6014731
https://forums.guru3d.com/data/avatars/m/268/268248.jpg
Zeblote:

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.
Because none from a marketing department will say " come buy people we are still behind in latency compared to ddr 4 " 😛
#6014751
data/avatar/default/avatar14.webp
checked what I could actually buy here : G.Skill F5-6400J3239G16GX2-TZ5RK DDR5-6400 32-39-39-102 2x16Gbs 607.50€ or 640$ 🙁