New cl26 DDR5 RAM for Ryzen coming in January.

Looks like G.Skill might be first to the scene with 4x64GB DDR5 at 6000Mhz and CL32 after years of other companies with it but not releasing theirs (or turning them to CUDIMM). So anyone looking for 256GB RAM for their system might finally be able to get it. Hoping the 7000 and 9000 series of chips gets support to running all of that, if not the speed, then all the capacity at least.
 
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Jay85 said:
This landed on my desk today

:D

Click to expand...

Did you do much work with these yet, looking to copy someone's homework :D I have the same RAM in my 9950X3D build, not started tuning yet as I noticed stress testing stock it got to a toasty 60C, which won't be helped with my 5080 venting over the top of it :o

AIDA Latency looks a little tragic @ 70s but that's probably as I am used to low 50s in on my 5950s DDR4 and I don't know what the norm is.
 
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sandys said:
Did you do much work with these yet, looking to copy someone's homework :D I have the same RAM in my 9950X3D build, not started tuning yet as I noticed stress testing stock it got to a toasty 60C, which won't be helped with my 5080 venting over the top of it :o

AIDA Latency looks a little tragic @ 70s but that's probably as I am used to low 50s in on my 5950s DDR4 and I don't know what the norm is.
Click to expand...

A5KUPXm.png


Latency on this is around 68ns, not sure how relevant it is tbh but its snappy!



im still testing 8000mhz on this kit but struggling

SgV3eIG.png



It might be a voltage thing but needs to be further investigated. It manages around 40 mins on occt but will error. Aim is to try and get this down to CL32.
 
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Thanks for that, turns out I’m not running those sticks at all, I have the 2x32 CL26 Doh! I know what I am doing honest guv :D

Got a fan on them now and started to play but can’t seem to go above the RAMs default 1.45v level, not sure if that’s a beta BIOS issue or if I have missed a switch to enable more, I’ll take a look on the weekend, BIOS on this Aorus xtreme is not as clear as my old Aorus, so I probably just need to gho through it more thoroughly.

I’d be interested in trying a 8000 setup also see what is better for 0.1% lows etc in the games I play, I made an assumption that it would not matter having x3d cache but I’ll always be wondering, so if I can get them to run at the looser timings that’d be great.
 
Buckster said:
realised yesterday what a difference with (my sticks of 6000 A die) volts wise 6200 cl28 vs cl30 is

6200 cl28 - VDD 1.43 and VDDIO 1.35v
6200 cl30 - VDD 1.32 and VDDIO 1.27v - with even tighter timings

going to stick with cl30 as at 1.43 I was noticing that I was approaching 60C under test and then failing test due to errors now temps have gone up a bit with the increase in ambient temps
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Hi, would you be able to share your Zentimings with your 6200 CL30

Thanks
 
Jay85 said:
It might be a voltage thing but needs to be further investigated. It manages around 40 mins on occt but will error. Aim is to try and get this down to CL32.
Click to expand...

It will mostly like be an heat issue at that point in the test.

Also a tRFC 620 is a little optimistic for an 24GB IC, id try the following:

tRFC 672
tRFC2 672
tRFCsb 546

If that works try the following:

tRFC 640
tRFC2 640
tRFCsb 520

Id also start with the voltage at VDD/Q 1.50

tWTRL shouldn't go any lower than 22 on 24GB IC's

Let me know if the above helps
 
RSR said:
It will mostly like be an heat issue at that point in the test.

Also a tRFC 620 is a little optimistic for an 24GB IC, id try the following:

tRFC 672
tRFC2 672
tRFCsb 546

If that works try the following:

tRFC 640
tRFC2 640
tRFCsb 520

Id also start with the voltage at VDD/Q 1.50

tWTRL shouldn't go any lower than 22 on 24GB IC's

Let me know if the above helps
Click to expand...
What sort of uplift are you seeing going 8000 vs 6000 CL26 with tight timings?
 
McCarthy said:
What sort of uplift are you seeing going 8000 vs 6000 CL26 with tight timings?
Click to expand...

I haven't tested it in any detail. However, running 2:1 on a single CCD isn't worth it as it can't take advantage of the increased bandwidth.

Mine's currently running at 8200 C34, which is the limit of my IMC on the 9950X3D. I do have 8200C32 running, but it's a bit on the edge, again, it could be the IMC or the memory IC's at that range. I can run some other kits to confirm that.

Here is an ideal of response times from various memory states:

6000 CL26 - 8.66ns
6400 CL26 - 8.125ns
8000 CL32 - 8ns
8200 CL32 - 7.80ns
8200 CL34 - 8.29ns
8400 CL34 - 8.10ns
 
I assume these are all the same ddr5 die just run with different settings, not had much time to play with mine, only managed 6200 CL26 on my Gskill 64Gb kit, my 9950x3d wouldn't do 2200 fclk but not done much research into what settings like voltages etc there are to play with.

Been pretty happy with the performance generally though even so to be fair, too busy playing games on it. Couldn't quite get its AIDA latency into the 50s like my 5950 but need to find me a tuning guide as right now I'm bashing in rando numbers and seeing what happens :D


 
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RSR said:
I haven't tested it in any detail. However, running 2:1 on a single CCD isn't worth it as it can't take advantage of the increased bandwidth.

Mine's currently running at 8200 C34, which is the limit of my IMC on the 9950X3D. I do have 8200C32 running, but it's a bit on the edge, again, it could be the IMC or the memory IC's at that range. I can run some other kits to confirm that.

Here is an ideal of response times from various memory states:

6000 CL26 - 8.66ns
6400 CL26 - 8.125ns
8000 CL32 - 8ns
8200 CL32 - 7.80ns
8200 CL34 - 8.29ns
8400 CL34 - 8.10ns
Click to expand...
Exactly what I’m looking for. Thanks!

It seems to be 8200 CL32 is the one to aim for. I’ve seen one result that’s pretty shocking but the guy is running an insane setup, and certainly not achievable by us mortals -

 
Toasty said:
Water cooled everything ram at 1.67v
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He certainly doesn’t hold back with the hobby.

What I’ve always wondered is, do these people have connections in certain companies, because they always seem to find hundreds of CPU’s in order to find one really good example. When the normal population struggle to get one.
 
Still need to do an overnight Karhu run at some point but the new Asus bios update with Dimm fit looks promising.

GDM disabled was not possible before running it.
6400 C26 GDM off on DR seems to work now.

CiUp3eh.png
 
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momo56 said:
Still need to do an overnight Karhu run at some point but the new Asus bios update with Dimm fit looks promising.

GDM disabled was not possible before running it.
6400 C26 GDM off on DR seems to work now.

CiUp3eh.png
Click to expand...
I’ll have to give GDM off another go. It wasn’t having it previously.
 
I just watched this video:
and the video in the pinned comment, to tighten up my timings.

I searched my ram code F5-6000J3040G32GX2-TZ5NR, on my motherboard manufacturer's qvl list to check if it was hynix.

I tested my RAM in DRAM calculator for Ryzen membench. Before: 156.98 after: 140.04.

These are the timings from the video:

These timings should work on pretty much any hynix based DDR5 kit that is currently available(16Gb M-die and A-die at the time of writing). At DDR5-6000.

Voltages
VDDIO / MVDD / MVDDQ: 1.35V
VSOC: 1.25V

Timings
tCL: just use XMP
tRCD: just use XMP
tRP: just use XMP
tRAS: 30*
tRC: 68
tWR: 48
tREFI: 50000
tRFC: 500
tRFC2: 400
tRFC4: 300
tRTP: 12
tRRD_L: 8 // Some hynix A-die really really sucks at tRRD_L
tRRD_S: 4
tFAW: 20
tWTR_L: 16
tWTR_S: 6
tRDRDSCL: 4
tRDRDSC: 1
tRDRDSD: AUTO (only relevant for dual rank)
tRDRDDD: AUTO (only relevant for multi rank)
tWRWRSCL: 4
tWRWRSC: 1
tWRWRSD: AUTO (only relevant for dual rank)
tWRWRDD: AUTO (only relevant for multi rank)
tWRRD: 2
tRDWR: 16



*This was previously 28 because the newest Asrock and ASUS BIOSes that I've been using don't enforce the memory controller tRAS limit of 30. This really doesn't make much of a difference to anything.

(Shame about the online safety act has made imgur.com block the entire UK).
 
megatron said:
I just watched this video:
and the video in the pinned comment, to tighten up my timings.

I searched my ram code F5-6000J3040G32GX2-TZ5NR, on my motherboard manufacturer's qvl list to check if it was hynix.

I tested my RAM in DRAM calculator for Ryzen membench. Before: 156.98 after: 140.04.

These are the timings from the video:

These timings should work on pretty much any hynix based DDR5 kit that is currently available(16Gb M-die and A-die at the time of writing). At DDR5-6000.

Voltages
VDDIO / MVDD / MVDDQ: 1.35V
VSOC: 1.25V

Timings
tCL: just use XMP
tRCD: just use XMP
tRP: just use XMP
tRAS: 30*
tRC: 68
tWR: 48
tREFI: 50000
tRFC: 500
tRFC2: 400
tRFC4: 300
tRTP: 12
tRRD_L: 8 // Some hynix A-die really really sucks at tRRD_L
tRRD_S: 4
tFAW: 20
tWTR_L: 16
tWTR_S: 6
tRDRDSCL: 4
tRDRDSC: 1
tRDRDSD: AUTO (only relevant for dual rank)
tRDRDDD: AUTO (only relevant for multi rank)
tWRWRSCL: 4
tWRWRSC: 1
tWRWRSD: AUTO (only relevant for dual rank)
tWRWRDD: AUTO (only relevant for multi rank)
tWRRD: 2
tRDWR: 16



*This was previously 28 because the newest Asrock and ASUS BIOSes that I've been using don't enforce the memory controller tRAS limit of 30. This really doesn't make much of a difference to anything.

(Shame about the online safety act has made imgur.com block the entire UK).
Click to expand...
That's buildzoids basic timing, been around for ages now..
 
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