G.Skill Trident Z RGB Series 32GB , is it dual rank

[tabascosauz]

So the last five digits reveal memory type used?

Good info , everyone has been great tbf.

Yes, CJR and DJR are 8820C/D or 8821C/D

As long as the first digit is 8 and not S, it will be dual rank.

 

[80251]

Do they even manufacture quad rank DIMMs? I read a long time ago in a Dell whitepaper when I was working in a datacenter about quad rank RDIMMS, but never actually saw any.

 

[tabascosauz]

Do they even manufacture quad rank DIMMs? I read a long time ago in a Dell whitepaper when I was working in a datacenter about quad rank RDIMMS, but never actually saw any.

Regardless of whether they exist in the server space, I don't think quad rank DIMMs are really a consideration in the consumer space. 4Gb products are dead, so to have quad rank with 8Gb you'd be looking at 32GB per DIMM - which is not a thing anyways because they just use dual rank 16Gb for 32GB DIMMs. Hynix A and M are both 16Gb as are some of the latest quietly introduced DDR4 ICs, which paints a pretty clear picture about the future of 8Gb.

Besides, DDR4 and DDR5 IMCs have yet to prove that they don't fall off a cliff past dual rank (2 ranks per channel) setups (max 64GB).

 

[80251]

The whitepapers I read for server configurations suggested quad rank RDIMMs were more performant, but they also seemed to run at lower frequencies than dual-rank kits and supported less DIMMs per channel. These were for Intel westmere and nehalem based servers which were triple channel.

 

[TheoneandonlyMrK]

4000.16 or 4100.17 (can't 4133 lmfao) was EZ for my Sung B-dies, purchased them "just to try" for holy f...kin sum of $$$ lol

Yes, CJR and DJR are 8820C/D or 8821C/D

As long as the first digit is 8 and not S, it will be dual rank.

View attachment 290556

Not double sided, S, so I'll have to hope for that high oc but I do get Extra memory so ah well.

 

[ThrashZone]

Hi,
Your amd system wont mind

 

[mechtech]

There's a 99.9% chance it is DR, as there's no chip density high enough to only populate one side of the stick and have a 16GB stick.

Not true, I have a set of ddr4-3200 team group 16GB sticks single rank single sided. I did get them in th ehope they were dual rank, but they werent.

Team Elite 16GB DDR4 3200 (PC4 25600) Desktop Memory Model TED416G3200C2201 - Newegg.com

Buy Team Elite 16GB DDR4 3200 (PC4 25600) Desktop Memory Model TED416G3200C2201 with fast shipping and top-rated customer service. Once you know, you Newegg!

www.newegg.ca

Having said that i do have an older gskill 2x16gb kit which is dual sided dual rank.

 

[TheoneandonlyMrK]

I have it looking stable at 2000(4000effective)memory and fabric, I'm still testing so early days no issues so far

 

[Deleted member 223428]

I have it looking stable at 2000(4000effective)memory and fabric, I'm still testing so early days no issues so far

Just do the obligatory check for the WHEA errors in Hwinfo. My 5950x would boot and run at 2000, but was spittin’ errors like a mofo.

 

[jaszy]

There's a 99.9% chance it is DR, as there's no chip density high enough to only populate one side of the stick and have a 16GB stick.

The people that post here must live under a rock.

16GB single sided sticks have been in circulation since 2020 from all the major memory IC manufacturers.

I would say a majority of cheaper sticks are SR.. 99%? lmao.

Theres a ton of Single Rank Samsung A die, Micron B and Hynix MJR saturating the market.

 

[3x0]

The people that post here must live under a rock.

I'm Patrick Star, didn't you know?

I've been corrected, and have corrected myself on the previous page... No need to be uppity.

 

[80251]

Can't you have dual rank DIMMs that are single-sided? It has to do with the IC's installed NOT how many sides are populated.

 

[jaszy]

Can't you have dual rank DIMMs that are single-sided? It has to do with the IC's installed NOT how many sides are populated.

Thats what DDR5 is.

DDR4 chip density is usually configured per side. It may be possible to configure such for DDR4 (Server oriented PCB/Firmware/BIOS), but consumer oriented stuff is either single or dual rank per side.

Quad rank DDR4 obviously works with 4 DR sticks populating a standard Mobo.

@evernessince
I've read that dual rank (or even quad rank) can give some performance increases over single rank but can you overclock single rank DIMMs far enough to make up for the difference?

Hynix claims that high density dual rank configurations have more bandwidth than lower density per marketing material. IE: 4x 16GB SR ("DR") or 2 x 32 DR (2 sides per stick)

I don't think anyone ever tested that claim, though.

 

[80251]

@jaszy
No quad rank DDR4 (or DDR3) has nothing to do with how many sticks are populating a given channel. It has to do with the type of RAM IC's installed on a stick. A dual rank DIMM is not a quad rank DIMM.

 

[jaszy]

@jaszy
No quad rank DDR4 (or DDR3) has nothing to do with how many sticks are populating a given channel. It has to do with the type of RAM IC's installed on a stick. A dual rank DIMM is not a quad rank DIMM.

???

A typical daisy chain layout will read 4x DR sticks as "quad rank" due to density config. Basically equal to a DDR4 server stick with die stacking..

The same way 4x SR sticks are more or less "Dual rank" and performs identical to a kit with two sides.

Yes it's possible to have density layouts of 4x4 on consumer DDR3.

A dual rank DIMM is dual rank. I didn't say otherwise. 4x4 config on two sticks can be Quad. More common in laptops.


Edit: I can't find the Hynix PDF, but marketing claimed 16GB density sticks have a bandwidth advantage over 8GB stick when configured as DR. Noone ever tested this as 64GB config is kinda unnecessary for a lot of people, especially gamers.

 

[80251]

@jaszy

A single DIMM can be quad rank. It doesn't matter how many single rank or dual rank DIMMs you install in a channel that will not magically make them quad rank. Interleaving memory access across channels or DIMMs within a channel is not the same as interleaving memory accesses within a single DIMM.
Here is an explanation of dual ranked, single ranked and quad ranked RAM, it has nothing to do with how many sticks you have installed (from a Fujitsu whitepaper on tuning performance with Intel Westmere CPU's in Primergy servers):

The number of ranks
The last table also shows that memory modules with 1, 2 or 4 ranks are available. This means: there are
DIMM with only one group of DRAM chips which synchronously read or write memory areas of width 64 bit.
The individual chip is responsible for 4 or 8 bit. Or there are two or four such groups. However, the DIMM
address and data lines are then common for both groups, i.e. only one of the groups can be active at any
given time. The motivation for dual and quad-rank DIMM is first the greater capacity, as can be seen in the
table.
A second advantage of dual and quad-rank modules is the physical reason already discussed. Memory cells
are arranged in two dimensions. A line is opened and then a column item is read in this line. While the line
(more commonly called page) is open, further column values can be read with a much lower latency. This
latency difference motivates optimization of the memory controller which reallocates the pending orders
regarding possible "open" memory pages. With dual and quad-rank modules, the probability of accessing an
open page increases.

 

[jaszy]

And I'm telling you the IMC reads 4x dual rank sticks as quad. Believe what you want, they will bench the same.

 

[80251]

And I'm telling you the IMC reads 4x dual rank sticks as quad. Believe what you want, they will bench the same.

I have a whitepaper from Fujitsu that backs up my claim, where's your proof? Show me where Thaiphoon reports dual ranked or single ranked memory as quad ranked!

 

[freeagent]

The only way I know of for sure getting a 2R stick is a 16GB stick of B-Die.

 

[tabascosauz]

Not double sided, S, so I'll have to hope for that high oc but I do get Extra memory so ah well.

Wait, really?? New high end DDR4 IC is news to me. Is the code S820C? Or did G.skill start buying Micron inventory all of a sudden, what's the code

Freq scaling shouldn't be a problem at all with your APU, but I think on DDR4 I would prefer dual rank for the free perf. DDR5 matters less. Anyways not the end of the world.

 

[80251]

And I'm telling you the IMC reads 4x dual rank sticks as quad. Believe what you want, they will bench the same.

What happens if I have two quad-rank DIMMs in two DIMM slots of the same channel are you saying that's the same as having two dual-rank DIMMS in the same channel?

 

[jaszy]

I have a whitepaper from Fujitsu that backs up my claim, where's your proof? Show me where Thaiphoon reports dual ranked or single ranked memory as quad ranked!

It interlaces as quad... It wont show.

Your white papers refer to die stacking on server oriented PCB/BIOS etc. It's completely irrelevant for consumer boards. High chance it wouldn't function either due to BIOS limitations.

What happens if I have two quad-rank DIMMs in two DIMM slots of the same channel are you saying that's the same as having two dual-rank DIMMS in the same channel?

Wont work on a consumer board.

A server will see two quad rank dims as octo rank. Would have to be clocked to lowest JEDEC for stability.


Again.. 4x 16GB SR DIMM = 64GB DUAL RANK for bandwidth purposes. They're identical in throughput. The same for any configuration after that.


Crucial has a basic TL;DR for consumers

What is memory rank

The concept of memory rank applies to all memory module form factors, though in general it tends to matter primarily on server platforms, due to the larger amounts of memory they manage.

www.crucial.com

 

[TheoneandonlyMrK]

Wait, really?? New high end DDR4 IC is news to me. Is the code S820C? Or did G.skill start buying Micron inventory all of a sudden, what's the code

Freq scaling shouldn't be a problem at all with your APU, but I think on DDR4 I would prefer dual rank for the free perf. DDR5 matters less. Anyways not the end of the world.

No they're exactly that S820C.

They're going well though, at 4000 still, though my infinity fabric doesn't take well to anything more than 1900 so I might settle at 3800 and tighten timings instead.

 

[tabascosauz]

No they're exactly that S820C.

They're going well though, at 4000 still, though my infinity fabric doesn't take well to anything more than 1900 so I might settle at 3800 and tighten timings instead.

16Gb CJR doesn't tighten well, at least from what I read on some of the first 16Gb CJR kits that appeared. Though, neither do any other Hynix kits, really, so not a problem.

I have seen some more recent pictures of 1.5V 4400+ kits with 16Gb CJR floating around. Something like 4400CL20. That suggests that it behaves closer to DJR (good), since G.skill's Hynix high freq kits (4000-5333) are traditionally dominated by DJR. DJR also came in XMP up to 1.6V (?not sure), but 1.5V XMP is still way more confident than 8Gb CJR.

So in conclusion, it could be a good clocker, but pointless for a 5900X and don't expect much in the way of timings. Since 8Gb CJR, Hynix's better offerings (ie. CJR and DJR, not crappy JJR and MJR) have more or less followed the same rules/behaviour for timings.

I don't think it will come anywhere close to the B-die you have - some regression if the B-die was also single rank, and more penalty if the B-die was a dual rank setup. If you had 32GB in total on B-die, it was dual rank.

Sorry, didn't realize you switched CPUs, thought it was still a 5600G. 1900MHz is a healthy daily for 5900X. You should not be running unsynced Fabric ever at these speeds if you care about performance.

 

[TheoneandonlyMrK]

16Gb CJR doesn't tighten well, at least from what I read on some of the first 16Gb CJR kits that appeared. Though, neither do any other Hynix kits, really, so not a problem.

I have seen some more recent pictures of 1.5V 4400+ kits with 16Gb CJR floating around. Something like 4400CL20. That suggests that it behaves closer to DJR (good), since G.skill's Hynix high freq kits (4000-5333) are traditionally dominated by DJR. DJR also came in XMP up to 1.6V (?not sure), but 1.5V XMP is still way more confident than 8Gb CJR.

So in conclusion, it could be a good clocker, but pointless for a 5900X and don't expect much in the way of timings. Since 8Gb CJR, Hynix's better offerings (ie. CJR and DJR, not crappy JJR and MJR) have more or less followed the same rules/behaviour for timings.

I don't think it will come anywhere close to the B-die you have - some regression if the B-die was also single rank, and more penalty if the B-die was a dual rank setup. If you had 32GB in total on B-die, it was dual rank.

Sorry, didn't realize you switched CPUs, thought it was still a 5600G. 1900MHz is a healthy daily for 5900X. You should not be running unsynced Fabric ever at these speeds if you care about performance.

I agree I am just in the testing phase.

Those b die got swapped for 2x 2x8 GB vengeance which I think had micron on them, which one set got sold on of.

I did learn something though, ask Before buying next time

I didn't get DR, I did get twice the memory though and it was stable at 3600 before, now we're at 3800 , a minor improvement but it should keep this pc in the game for three years.