DRAM calculator for Zen 3

[Alyjen]

With GDM off I have to raise voltage by 0.03V, for each number I lower CL I must raise voltage by 0.05-0.07V. 3733cl16 with tweaked subs is stable at 1.35V, GDM req 1.38V, 3733cl15 req 1.43V and 3733cl14 req 1.49V. I have Micron rev E so not directly comparable.

In my case unless i adjust CAD_BUS values I won't even boot with 3800CL15 & GDM:OFF, no matter how much voltage I try to run my memory with.

 

[Cowboystrekk]

In my case unless i adjust CAD_BUS values I won't even boot with 3800CL15 & GDM:OFF, no matter how much voltage I try to run my memory with.

No problem adjusting cadbus, just do it I have to use the dram calc values for cadbus and procodt to get everything good and stable.

 

[Anonymous1243]

Closed fan control software for some extra latency

Unfortunate I like my case fans controlled by GPU temp and can't do that in BIOS

 

[SirMaster]

Closed fan control software for some extra latency
View attachment 176776
Unfortunate I like my case fans controlled by GPU temp and can't do that in BIOS

Do you know why your write throughout is so low?

Also, which test config is that in TestMem5?

 

[Anonymous1243]

Do you know why your write throughout is so low?

Also, which test config is that in TestMem5?

It's just how single chiplet Ryzen is: https://docs.google.com/spreadsheet...0MWVPcYjf6nOlr9CtkkfN78tSo/edit#gid=321590489
And it's 1usmus_v3, guess I did block something important with that placement

 

[Alyjen]

Closed fan control software for some extra latency
View attachment 176776
Unfortunate I like my case fans controlled by GPU temp and can't do that in BIOS

Impressive timings! What voltage do you run to have it stable? Did you adjust ProcODT, or Rtt settings or is this default for your motherboard?

 

[Cowboystrekk]

Closed fan control software for some extra latency
View attachment 176776
Unfortunate I like my case fans controlled by GPU temp and can't do that in BIOS

Very good result. Only 3 values you might lower more are tRP (11-13), tWR 10 and tRRDL 4. All these values work for my 3733-setup. Maybe it will give you a few hundred more on read and 0.5 on latency

 

[Anonymous1243]

Impressive timings! What voltage do you run to have it stable? Did you adjust ProcODT, or Rtt settings or is this default for your motherboard?

1.530v in BIOS which it and HWinfo report as 1.516-1.520v. Any lower isn't stable. Can't remember what defaults were, set them as the calculator recommended.
Also needed a fan not to error

 

[Alyjen]

@Dreamic well, that's hot! Too high voltage for my likening and 24x7 use but I may copy some of your settings I really hope for more stable FCLK 2000MHz so i can set something rather easy like 4000MHz CL16 with tight subs

 

[Anonymous1243]

@Dreamic well, that's hot! Too high voltage for my likening and 24x7 use but I may copy some of your settings I really hope for more stable FCLK 2000MHz so i can set something rather easy like 4000MHz CL16 with tight subs

Lots of people have ran their BDie at 1.55v for years and even more at 1.50v which this is barely over, and they don't have temp sensors but if it's not erroring it's not too hot.
I hope I can get higher FCLK too, 1900 would've been nice bare minimum

 

[tabascosauz]

@Dreamic well, that's hot! Too high voltage for my likening and 24x7 use but I may copy some of your settings I really hope for more stable FCLK 2000MHz so i can set something rather easy like 4000MHz CL16 with tight subs

Viper Steel 4400 is the top bin for that line. You shouldn't need even 1.5V for flat 16 @ 4000. Only problem is waiting for the AGESA 1180 firmware improvements to see if your CPU can do 2000MHz IF.

I'd be careful past 1.5V; heat is never an issue with the DIMMs themselves, but it should be no secret how much a high end GPU can heat up the RAM (especially a 3080). And even with good airflow, there's no way around that while playing any decently demanding game, unless your graphics card is just for show. And the Vipers don't have temp sensors.

 

[Alyjen]

My thoughts exactly, I'm waiting to see if FCLK 2000MHz is an option.

With vipers it can happen that this thermal compound they use to glue this joke of a heatsink is not covering whole die, then you're out of luck as they will overheat even at 1.5V.

If not I'll work on having tighter 1900MHz. I may get some extra cooling dedicated to RAM, I really prefer long term stability over nice benchmark figures, and by long term I mean years, my old platform with 6600K overclocked and undervolted was running for years without a single issue and it's still going to serve some yeras in my kids rig

 

[Anonymous1243]

You shouldn't need even 1.5V for flat 16 @ 4000.



View attachment 176986

Maybe I lost the lottery as usual cause 1.52v in BIOS with my settings is unstable fan full blast, and 1.53v overheats and errors without a fan.

 

[tabascosauz]

Maybe I lost the lottery as usual cause 1.52v in BIOS with my settings is unstable fan full blast, and 1.53v overheats and errors without a fan.

I don't think you necessarily lost, but 4 sticks jammed up next to each other is also just harder to cool. That's the whole reason why I have no GPU in that rig, and I still only have 2 sticks.

Setting 1.53V in BIOS also doesn't mean you're getting 1.53V, not sure if VDRAM is a visible SuperIO sensor on MSI motherboards. My board overvolts RAM by 0.06V over what is set in BIOS, so I go off the sensor reading instead.

And if you're talking about 3733/14, CL14 is just damn hard to run. I can't even post 3800/14. That would probably need 1.6V just to boot, while 4000/16 is 1.47V stable.

 

[Anonymous1243]

I don't think you necessarily lost, but 4 sticks jammed up next to each other is also just harder to cool. That's the whole reason why I have no GPU in that rig, and I still only have 2 sticks.

Setting 1.53V in BIOS also doesn't mean you're getting 1.53V, not sure if VDRAM is a visible SuperIO sensor on MSI motherboards. My board overvolts RAM by 0.06V over what is set in BIOS, so I go off the sensor reading instead.

And if you're talking about 3733/14, CL14 is just damn hard to run. I can't even post 3800/14. That would probably need 1.6V just to boot, while 4000/16 is 1.47V stable.

1.53v is reported as 1.516v-1.520v by BIOS and HWinfo, so if that's accurate my board is undervolting. And yea 3733/14, figured if I can't hit 1900 FCLK yet 3733/16 is kinda weak too
I didn't dish out on BDie to run a measely 3733/16

 

[brandon7171]

nice latency! best I can do is 57.2ns, but I am on 32gb 2x16 kit

@SirMaster if you are stable there, leave it and enjoy! once new BIOS comes out, ram OC'ing should be better then. should be a a few months away. not sure. it will also enable 4000 1:1 more broadly.

Wow, thats amazing i am on a 2x8 kit and when i enable Xmp it tries to run at 4400mhz, but i have 4x8 running. I am new and i am trying to save me self money bc i am wanting a actually 4x8 kit bc my QVL just updated and this memory does not support 4X8. Thanks for letting me know i have hope with this ram if i can get it right but im a noob..

Shouldn't it not matter if I can't even post 1900 FCLK with RAM at default 2133mhz? It's Patriot 4400C19 B-Die. I imported XMP into DRAM Calc from Thaiphoon. It's 100% stable at 3600C14 TM5 1usmus overnight and 3733C16 settings I posted so far for a couple hours, about to run overnight. I'm certain it can run 3800 and it's not the RAM holding me back, I can test 3800 tomorrow but there's not much of a point cause I lose 1:1 if CPU/Mobo BIOS can't hit 1900. I might check old BIOS as Ampeg suggested but that has issues of its own above 3200

I am having a issue with thermaltake ram 4400Mhz. When i lower it to 4000mhz my cpu will boot.

Shouldn't it not matter if I can't even post 1900 FCLK with RAM at default 2133mhz? It's Patriot 4400C19 B-Die. I imported XMP into DRAM Calc from Thaiphoon. It's 100% stable at 3600C14 TM5 1usmus overnight and 3733C16 settings I posted so far for a couple hours, about to run overnight. I'm certain it can run 3800 and it's not the RAM holding me back, I can test 3800 tomorrow but there's not much of a point cause I lose 1:1 if CPU/Mobo BIOS can't hit 1900. I might check old BIOS as Ampeg suggested but that has issues of its own above 3200

i am having pretty much same issue with my ram. My timings r like28. 27.27. 83 my timings r so off. What is the best way to get them at least better than they r?

 

[Anonymous1243]

i am having pretty much same issue with my ram. My timings r like28. 27.27. 83 my timings r so off. What is the best way to get them at least better than they r?

Use DRAM Calculator? Does its recommended timings not work at bootable speed?

 

[harm9963]

DRAM Calculator needs to be updated, plus used Linpack Xtream 64 and finds errors fast , cant run full XMP , one error is to many , but 3600CL 14 fast preset , runs my games just fine, and less heat , 138V vs 1.50V .

 

[brandon7171]

DRAM Calculator needs to be updated, plus used Linpack Xtream 64 and finds errors fast , cant run full XMP , one error is to many , but 3600CL 14 fast preset , runs my games just fine, and less heat , 138V vs 1.50V .
View attachment 177846

Is this a Free Program? Im not having any errors in my ram, i have ran memtest86 for hours no errors its just my timings are off and my computer runs slow on boot
Here is my System Build


MotherBoard- - Asus Rog CrossHair VIII Formula X570 With Pcie 4.0

Processor- - AMD Ryzen 7 3700X 8 Core

Full Tower Case- - Rosewill Gaming ATX Full Tower Computer Case Cases Thor V2 Black

SSD- - WD_Black SN750 1TB NVMe Internal Gaming SSD - Gen3 PCIe, M.2 2280, 3D NAND

Processor FAN- - Noctua NH-D15, Premium CPU Cooler with 2x NF-A15 PWM 140mm Fans

Power Supply- - EVGA SuperNOVA 850 T2, 80+ TITANIUM 850W, Fully Modular, EVGA ECO Mode, 10 Year Warranty

Ram- - 32GB Of Ram Installed- Thermaltake TOUGHRAM RGB DDR4 4400MHz 16GB (32GB) 16.8 Million Color RGB

GPU- - EVGA Geforce GTX 1070 Ti 8GB FTW2

 

[harm9963]

Linpack Xtreme 1.1.7 Download

Linpack is a benchmark and the most aggressive stress testing software available today. Best used to test stability of overclocked PCs. Linpack tends

www.techpowerup.com

Is this a Free Program? Im not having any errors in my ram, i have ran memtest86 for hours no errors its just my timings are off and my computer runs slow on boot
Here is my System Build


MotherBoard- - Asus Rog CrossHair VIII Formula X570 With Pcie 4.0

Processor- - AMD Ryzen 7 3700X 8 Core

Full Tower Case- - Rosewill Gaming ATX Full Tower Computer Case Cases Thor V2 Black

SSD- - WD_Black SN750 1TB NVMe Internal Gaming SSD - Gen3 PCIe, M.2 2280, 3D NAND

Processor FAN- - Noctua NH-D15, Premium CPU Cooler with 2x NF-A15 PWM 140mm Fans

Power Supply- - EVGA SuperNOVA 850 T2, 80+ TITANIUM 850W, Fully Modular, EVGA ECO Mode, 10 Year Warranty

Ram- - 32GB Of Ram Installed- Thermaltake TOUGHRAM RGB DDR4 4400MHz 16GB (32GB) 16.8 Million Color RGB

GPU- - EVGA Geforce GTX 1070 Ti 8GB FTW2

 

[Nims]

Here is my MemBench score. Also using a MSI Tomahwk x570.

 

[brandon7171]

Here is my MemBench score. Also using a MSI Tomahwk x570.

Im honestly not sure if this is good are bad, i have 4 stick of this so its a 4X8 kit
Thermaltake TOUGHRAM RGB DDR4 4400MHz 16GB. But i have 32GB total
Is This a good bench, i know my boot time is slow for sure.. When i go play with the 3200mhz it speeds my boot time up.. I honestly think this ram has a problem bc this kit is really a 2X8 Kit.. Im not to good with this im a noob.. My Processor is Ryzen 7 3700X 8 Core. Motherboard is Crosshair 8 Formula VIII X570

 

[Cowboystrekk]

Im honestly not sure if this is good are bad, i have 4 stick of this so its a 4X8 kit
Thermaltake TOUGHRAM RGB DDR4 4400MHz 16GB. But i have 32GB total
Is This a good bench, i know my boot time is slow for sure.. When i go play with the 3200mhz it speeds my boot time up.. I honestly think this ram has a problem bc this kit is really a 2X8 Kit.. Im not to good with this im a noob.. My Processor is Ryzen 7 3700X 8 Core. Motherboard is Crosshair 8 Formula VIII X570

Did you use the dram calc at all? Those are very loose timings all over. You should be able to run atleadt 3400 with 4 sticks, probably even more.

 

[Caring1]

im a noob..

Because you are a noob, I'll let you in on a secret, large type and bolding won't get you an answer any faster.
Calm ya farm.

 

[brandon7171]

Because you are a noob, I'll let you in on a secret, large type and bolding won't get you an answer any faster.
Calm ya farm.

Honestly on the bold text I copied and pasted it off from Amazon and it started the bold text and I did not know how to change it back.

Did you use the dram calc at all? Those are very loose timings all over. You should be able to run atleadt 3400 with 4 sticks, probably even more.

No did not use it sneekypeet helped me on tighten my timings up he was awesome help. I just wanted to tighten timing I did not want to enter the rest of the stuff. I was hearing dram calculator was not to accurate.