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Ryzen DRAM Calculator by 1usmus

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I have tried different settings I can do 527 on RFC but I don't like using higher volts to get lower rfc. If I drop wtrs to 4 I get 1 error in testmem. SCL at 4 or 3 give about the same performance not much difference. it was at 4 before i seem to get slightly higher copy rates with 3s.
Try 528, rfc is best divideable by 8 for 8gb kits and 16 for 16gb kits :)
 

novax94br

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I can do 3600 CL14 @ 1.42V with my 32GB Kit of E-Die. If I had a capable CPU im sure I could do 3800 CL14. I can to tRCDRD of 17 @ 1.45V but 18 still gives good performance.
View attachment 231987View attachment 231989
nice...yeah my issue was all from the voltage(i needed 1.45) the mb just wasn't pushing it enough in the default docp profile ..I prob need to get a better mb
 
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I thought I was stuck at 3466 with my Zen + CPU but after reading somewhere that ProcODT, termination block and Cad bus settings were often the stumbling block with getting zen + cpus to higher frequencies, I played around with those settings until I found the magic formula (which Dram Calculator didn't suggest) and got 3533 stable on my system. 3600 still eludes me though.
I just wanted to report that I found the magic formula of Termination and Cad Bus settings for 3600MHz with my setup. They were not the same as 3533. Below are the Dram Calculator suggestions and what actually worked. So Ryzen Zen+ owners, if you are stuck in the 3400 range, there is some hope for higher frequencies if you want to put the work into it.

1645125633538.png
 
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I have found this calculator to propose very agressive timings now, when I was looking at my 5600G setup (and same for 2600X really). I picked the worst spec'd ram on the left, and selected the safe option, and it suggested timings that prevented even a post. So not very safe :) In addition the author of the app, I have seen him post a lot of stuff that conflicts with what the app recommends. The tool seems to work well on samsung B die though, just not on lower end hynix stuff or samsung E die.
 
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I have found this calculator to propose very agressive timings now, when I was looking at my 5600G setup (and same for 2600X really). I picked the worst spec'd ram on the left, and selected the safe option, and it suggested timings that prevented even a post. So not very safe :) In addition the author of the app, I have seen him post a lot of stuff that conflicts with what the app recommends. The tool seems to work well on samsung B die though, just not on lower end hynix stuff or samsung E die.
Agreed. When i had Hynix JJR it suggested unrealistic timings. Now i have B-Die but i got the best timings by just copying what Buildzoid used on the same kit i have (Patriot Viper 4400). Plus the program has not been updated for nearly 2 years now (last update 15th May 2020) and the author now works at AMD (kudos to AMD recognising talent).

It seems to me that he starts a program with a big bang but then it fizzles out over some number of months. Happened with DRAM Calc, happened with ClockTuner,happened with Powerplan etc. Hydra is the latest but we will see how lang that lasts.
 
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Agreed. When i had Hynix JJR it suggested unrealistic timings. Now i have B-Die but i got the best timings by just copying what Buildzoid used on the same kit i have (Patriot Viper 4400). Plus the program has not been updated for nearly 2 years now (last update 15th May 2020) and the author now works at AMD (kudos to AMD recognising talent).

It seems to me that he starts a program with a big bang but then it fizzles out over some number of months. Happened with DRAM Calc, happened with ClockTuner,happened with Powerplan etc. Hydra is the latest but we will see how lang that lasts.
Yeah I dont even know why I tried the timings I knew they were never going to work just from looking lol. Did it when I first got cpu, just not posted until now.

Didnt know he got employed by them, I wonder if he assisted in their memory compatibility improvements.
 

sirksel

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A little new to this... but I just built a Ryzen 5950x on a ROG Dark Hero board with 128GB (4x32) of G.Skill Trident Z Neo (F4-3200C16Q-128GTZN), and I'm still within the return window on the parts. I originally was using DOCP/XMP settings, but ultimately went back to the motherboard's safe defaults. Even though it boots fine, and loads Win10, etc. I was still getting a very occasional BSOD.

I investigated with memtest86 boot disk and found reports of 50 or so errors on the test #2 and #3 (and I stopped there). I downloaded the DRAM Calculator to see if I could figure out some better timings, but I didn't see the 5950x in the processor drop down, nor did I know how to set the memory type, pcb revision, etc. for this ram.

Could anyone point me to some steps I might take to solve this or properly use the DRAM Calculator? I was sure I could get this working on DOCP (but couldn't) and then when the safe defaults didn't work, I was really baffled!

P.S. I also have an unopened G.Skill Trident Z Neo (F4-3600C18Q-128GTZN), but I didn't want to open it unless someone thinks it might solve the problem. I live far from the nearest MicroCenter, but these are the only two 128GB kits they carry. G.Skill support seems to think that either should work.

Thanks SO MUCH for any help or advice you all can send my way. (Also, is there a good discord board where you all IM about such stuff?) Many thanks!
 
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A little new to this... but I just built a Ryzen 5950x on a ROG Dark Hero board with 128GB (4x32) of G.Skill Trident Z Neo (F4-3200C16Q-128GTZN), and I'm still within the return window on the parts. I originally was using DOCP/XMP settings, but ultimately went back to the motherboard's safe defaults. Even though it boots fine, and loads Win10, etc. I was still getting a very occasional BSOD.

I investigated with memtest86 boot disk and found reports of 50 or so errors on the test #2 and #3 (and I stopped there). I downloaded the DRAM Calculator to see if I could figure out some better timings, but I didn't see the 5950x in the processor drop down, nor did I know how to set the memory type, pcb revision, etc. for this ram.

Could anyone point me to some steps I might take to solve this or properly use the DRAM Calculator? I was sure I could get this working on DOCP (but couldn't) and then when the safe defaults didn't work, I was really baffled!

P.S. I also have an unopened G.Skill Trident Z Neo (F4-3600C18Q-128GTZN), but I didn't want to open it unless someone thinks it might solve the problem. I live far from the nearest MicroCenter, but these are the only two 128GB kits they carry. G.Skill support seems to think that either should work.

Thanks SO MUCH for any help or advice you all can send my way. (Also, is there a good discord board where you all IM about such stuff?) Many thanks!
Running four 32GB sticks is pretty hard for the memory controller.
Without knowing exact timings and voltages it's hard to suggest anything. What is your goal? Do you want to overclock from 3200 CL16?

Please post a screenshot from Zentimings: https://github.com/irusanov/ZenTimings/releases
 
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Yeah that's a lot of RAM. Just because G.Skill rates the ICs as good, you still have to worry about motherboard signal limitations, and of course processor memory controller limitations.

I'd try the JEDEC speeds/timings first, then bump them up until you find your best frequency, then work on timings.

When you hit road blocks, try adding more SoC voltage and DRAM voltage. Try actively cooling the SoC VRM and the DRAM. Tuning that much RAM will not be easy but I bet you can get it to run faster than JEDEC speed/timing.
 

ir_cow

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128GB (4x32) of G.Skill Trident Z Neo (F4-3200C16Q-128GTZN),
This is your problem. 4x Dual Rank and AMD Ryzen. You are lucky 3200 even works. You'll need to push the SoC voltage to 1.175V or above if you are still getting BSOD just with the XMP. Since the IOD rail is part of the SA, you need to raise the SA voltages to stabilize the memory controller rail.
 
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sirksel

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Hi Tomorrow. Thanks for the quick reply. The quick answer to your question is that I just want it to be stable. I'd like it to be as fast as it reasonably can be, given that stability is goal #1. Right now, even the mobo defaults are giving occasional bsod (once every few days) and memtest86 gives some errors. It's usable, just not totally stable. Here's the Zentimings output, and I'm running the mobo defaults right now (not even XMP):
1650051945597.png

Do you think it would be more stable with the other kit I have? It's 3600C18. They're about the same price so I'm indifferent between them. I need to return one or both of them by the end of the weekend, which is why I'm trying to get to stable now (so I can test it hard over the weekend).

Also if anyone knows that some other kit for sure works at 128GB with rock solid timings, I guess I'm open to buying off Amazon or whatever, even if it costs a little more. I just don't want to waste the considerable coin I've spent on this rig by being plagued with occasional BSODs. :)

Thanks so much for the help!
 

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A little new to this... but I just built a Ryzen 5950x on a ROG Dark Hero board with 128GB (4x32) of G.Skill Trident Z Neo (F4-3200C16Q-128GTZN), and I'm still within the return window on the parts. I originally was using DOCP/XMP settings, but ultimately went back to the motherboard's safe defaults. Even though it boots fine, and loads Win10, etc. I was still getting a very occasional BSOD.

I investigated with memtest86 boot disk and found reports of 50 or so errors on the test #2 and #3 (and I stopped there). I downloaded the DRAM Calculator to see if I could figure out some better timings, but I didn't see the 5950x in the processor drop down, nor did I know how to set the memory type, pcb revision, etc. for this ram.

Could anyone point me to some steps I might take to solve this or properly use the DRAM Calculator? I was sure I could get this working on DOCP (but couldn't) and then when the safe defaults didn't work, I was really baffled!

P.S. I also have an unopened G.Skill Trident Z Neo (F4-3600C18Q-128GTZN), but I didn't want to open it unless someone thinks it might solve the problem. I live far from the nearest MicroCenter, but these are the only two 128GB kits they carry. G.Skill support seems to think that either should work.

Thanks SO MUCH for any help or advice you all can send my way. (Also, is there a good discord board where you all IM about such stuff?) Many thanks!
The issue is that not all 32GBX4 kits can run on that board. The QVL is limited to a handful of kits that can run in 128GB config.

Rather contact ASUS or look at your boards QVL list when buying a 128GB kit and make sure its says support for 4 DIMMS

I would try the XMP profile with 1.2V on the SOC has already stated by @ir_cow

Edit
Sorry posted link to the normal Crosshair not the Dark hero.
 
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4 x DIMMs Dual Ranked as well, that really reduces the maximum speed of the RAM. This is from the Ryzen 3000 OC guide here page 11.
Ryzen3000.jpg


ROG Crosshair VIII Dark Hero Motherboard does support F4-3600C16Q-32GTZN as 4xDIMMs with a 5950x. So thats 32GB. F4-3200C16Q-128GTZN I cant find at all. Cant find F4-3600C18Q-128GTZN as well.

The 128GB kits on the ROG Crosshair VIII Dark Hero Motherboard memory QVL are as follows.

Ram on QVL.jpg

F4-3200C16Q-128GTZN The memory manufacture's website does not list the ROG Crosshair VIII Dark Hero Motherboard as compatable. CL16-18-18-38 1.35V
F4-3600C18Q-128GTZN matches the ROG Crosshair VIII Dark Hero motherboard with a Ryzen 5000 series cpu. So that kit could work. CL18-22-22-42 1.35V
Match.jpg
 
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Ok, weird, 3900x and strix b450f and g.skill tridentZ F4-3200C14D-16GTZ running CAS 22 at 3200mhz! Why?
 
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Ok, weird, 3900x and strix b450f and g.skill tridentZ F4-3200C14D-16GTZ running CAS 22 at 3200mhz! Why?
Could be spd profile at 1.2v. Activate xmp and it will probably be fine.
 
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Did that, Asus is naming it differently, its all ok on cl14 and 3200mhz . Now new problem, when I want to update bios, white led shines for gpu problem, after hard reset its working on old bios.
 
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