Question 3600mhz CL16 RAM not stable on 3900X

Jan 13, 2022
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Hi all, recently I just made an upgrade on my Memory from Ramaxel 48gb 2400mhz cl18 to Kingston Fury Renegade 216gb 3600mhz cl16 - KF436C16RB1AK2/32. There are 2 XMP profiles available 1: DDR4-3600 CL16-20-20 @1.35V, and 2: DDR4-3000 CL15-17-17 @1.35V. I started with the first one, caused me 4 BSOD within 2 days and I swtiched to profile 2 which seems to resolve all the problems/instabilities. I was wondering what would be the problem for system being instable at 3600mhz cl16? Should try to manually OC to 3200mhz and lower cl such as 14-14-14? or let it stay on profile 2? another weird thing is from the Specifications page of Kingston it says that profile 2 comes at CL15-17-17 but from CPUZ it shows as 16-17-17.

Here are my specs:
Operating System Microsoft Windows 10 Pro x64
CPU Type 12-Core AMD Ryzen 9 3900X, 4550 MHz (45.5 x 100)
Motherboard Name MSI MPG X570 Gaming Pro Carbon WiFi (MS-7B93) (2 PCI-E x1, 2 PCI-E x16, 2 M.2, 4 DDR4 DIMM, Audio, Video, Gigabit LAN, WiFi)
Motherboard Chipset AMD Bixby X570, AMD K17.7 FCH, AMD K17.7 IMC
System Memory 32720 MB
DIMM3: Kingston KF3600C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (16-17-17-36 @ 1500 MHz)
DIMM4: Kingston KF3600C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (16-17-17-36 @ 1500 MHz)
BIOS Type AMI (01/14/2020)
Video Adapter NVIDIA GeForce GTX 1080 (8 GB)
Case TUF Gaming GT501
CPU Cooler Cooler master masterliquid 360r rgb
PSU I dont know the model, but its 600-650W.

Huge thanks to all of you that spent time reading this.
 
Last edited:
Jan 13, 2022
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Your CPU is specced to run up to 3200 memory by AMD. You can sure try overclocking the memory controller inside the CPU but the results are not guaranteed by anyone.
I m new to this, but what does oc memory controller inside the CPU means? is that manually oc the mhz and all the timing?
 
I m new to this, but what does oc memory controller inside the CPU means? is that manually oc the mhz and all the timing?
Anytime you try to use anything above 3200 you are taking the memory controller outside its design speed set out by AMD (in other words, overclocking). The memory controller is a part of your CPU. Timings are usually not an issue for it, more of RAM module design parameters.
 
Jan 13, 2022
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Anytime you try to use anything above 3200 you are taking the memory controller outside its design speed set out by AMD (in other words, overclocking). The memory controller is a part of your CPU. Timings are usually not an issue for it, more of RAM module design parameters.
So anytime I set my RAM to 3600mhz or anything above 3200mhz either through XMP or manually Im oc cpus memory controller right? and its like a lottery if it will be stable or not. If not the maximum I could go is potentially 3200mhz.
 
Reactions: vov4ik_il
Hi all, recently I just made an upgrade on my Memory from Ramaxel 48gb 2400mhz cl18 to Kingston Fury Renegade 216gb 3600mhz cl16 - KF436C16RB1AK2/32. There are 2 XMP profiles available 1: DDR4-3600 CL16-20-20 @1.35V, and 2: DDR4-3000 CL15-17-17 @1.35V. I started with the first one, caused me 4 BSOD within 2 days and I swtiched to profile 2 which seems to resolve all the problems/instabilities. I was wondering what would be the problem for system being instable at 3600mhz cl16? Should try to manually OC to 3200mhz and lower cl such as 14-14-14? or let it stay on profile 2? another weird thing is from the Specifications page of Kingston it says that profile 2 comes at CL15-17-17 but from CPUZ it shows as 16-17-17.

Here are my specs:
Operating System Microsoft Windows 10 Pro x64
CPU Type 12-Core AMD Ryzen 9 3900X, 4550 MHz (45.5 x 100)
Motherboard Name MSI MPG X570 Gaming Pro Carbon WiFi (MS-7B93) (2 PCI-E x1, 2 PCI-E x16, 2 M.2, 4 DDR4 DIMM, Audio, Video, Gigabit LAN, WiFi)
Motherboard Chipset AMD Bixby X570, AMD K17.7 FCH, AMD K17.7 IMC
System Memory 32720 MB
DIMM3: Kingston KF3600C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (16-17-17-36 @ 1500 MHz)
DIMM4: Kingston KF3600C16D4/16GX 16 GB DDR4-3000 DDR4 SDRAM (16-17-17-36 @ 1500 MHz)
BIOS Type AMI (01/14/2020)
Video Adapter NVIDIA GeForce GTX 1080 (8 GB)
Case TUF Gaming GT501
CPU Cooler Cooler master masterliquid 360r rgb
PSU I dont know the model, but its 600-650W.

Huge thanks to all of you that spent time reading this.
First thing to do is fit the ram in the proper slots.
I doubt it's dimm 3+4.
You might want to use memtest86 for testing.
Don't take a chance on trashing the OS with ram errors.
You can also look into updating the bios.
 
Jan 13, 2022
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First thing to do is fit the ram in the proper slots.
I doubt it's dimm 3+4.
You might want to use memtest86 for testing.
Don't take a chance on trashing the OS with ram errors.
You can also look into updating the bios.
I did put it on slot 2 and 4 on my MB but dunno why it appears to be on dimm 3 and 4 on aida64.
So should I try again select xmp 3600mhz cl16 and run memtest86?
 

bfollett

Distinguished
Mar 14, 2005
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I'd double check that you truly are using memory slots 2 & 4. Also try CPU-Z to confirm which slots are occupied. AMD always puts a rather safe value for the memory controller clock. There are very few Ryzen 3000 chips that won't run 3600 ram. Hopefully you aren't one of the unlucky few.
 
Jan 13, 2022
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I'd double check that you truly are using memory slots 2 & 4. Also try CPU-Z to confirm which slots are occupied. AMD always puts a rather safe value for the memory controller clock. There are very few Ryzen 3000 chips that won't run 3600 ram. Hopefully you aren't one of the unlucky few.
I just checked on cpuz and its slot 2 and 4 which is weird why it appears on dim 3 and 4.
Here s the screenshot: View: https://imgur.com/a/a0YSIPp
 

Karadjgne

Titan
Ambassador
With MSI, from cpu it's A1-A2-B1-B2, so yes, that's #2/#4 slots for ram. That's a must with Ryzen.

Technically there's no limits to ram speeds, regardless of memory controller speeds, ppl are using 5000MHz ram just fine. The only thing amd and Intel does is spec upto a certain speed, anything above that is not officially tested and therefor not officially supported. Meaning it's pot-luck as to whether it works or not, or needs adjusting or not.

Not all memory controllers respond the same. Some just seem to be better than others. And that's all on the individual cpu, not specifically per model of cpu, but the actual physical cpu. You could have a particularly weak mc in yours, and that may require a little more adjustment manually than someone else with the same cpu. The ram is rated to run at xmp, will run at xmp, but that's no guarantee that your cpu will like it. DDR4 is capable of upto 1.5v but that's not advisable.

I'd set xmp 3600, check f-clock is set manually for 1800, bump dram voltage manually to 1.38-1.39v ( as suggested above) and set SoC voltage closer to 1.2v (don't exceed 1.2v for any reason)
 
Reactions: drivinfast247
Jan 13, 2022
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With MSI, from cpu it's A1-A2-B1-B2, so yes, that's #2/#4 slots for ram. That's a must with Ryzen.

Technically there's no limits to ram speeds, regardless of memory controller speeds, ppl are using 5000MHz ram just fine. The only thing amd and Intel does is spec upto a certain speed, anything above that is not officially tested and therefor not officially supported. Meaning it's pot-luck as to whether it works or not, or needs adjusting or not.

Not all memory controllers respond the same. Some just seem to be better than others. And that's all on the individual cpu, not specifically per model of cpu, but the actual physical cpu. You could have a particularly weak mc in yours, and that may require a little more adjustment manually than someone else with the same cpu. The ram is rated to run at xmp, will run at xmp, but that's no guarantee that your cpu will like it. DDR4 is capable of upto 1.5v but that's not advisable.

I'd set xmp 3600, check f-clock is set manually for 1800, bump dram voltage manually to 1.38-1.39v ( as suggested above) and set SoC voltage closer to 1.2v (don't exceed 1.2v for any reason)
At this point in time I don't even bother about 3600... I tried with Memory Tri it from msi board with 3200mhz cl 16-18-18-36, same issue with stability test... Hardware failure detected as shown on the image from previous reply... I ll try setting up things manually then.
 
Jan 13, 2022
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Are you on latest BIOS?
Not rly. I shall try to upgrade it then, I was afraid of upgrading cause due to win 11 comp some motherboards newest BIOS run into compatibility issues. tried with Prime95, same situation, initiated the test and run into "Hardware failure detected running 960K FFT size, consult stress.txt file.

Is it problem with those Kingston sticks? Im moving towards returning these and buy a pair of 3200mhz cl14/16 g.skill ones.
 

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