Question AM5 system (9700X+B650E) with 48GB DDR5 running at 7200MT/s (DOCP enabled) but won't boot with DOCP disabled ?

[animemangamer]

The video above shows my initial results right after I installed the 7200MT/s dual channel kit in my AM5 system and they seem to default at 6400MT/s. I was initially afraid it won't even boot and give me the orange led (dram error) but it worked as soon as I boot it up, well at least for me.

I recently replaced my 64GB (16GBx4) 6000MT/s kit because I was coming from an Intel platform and switched back to AMD and but wasn't aware AM5 only accepts 2 sticks so I was stuck with only 32GB dual channel 6000MT/s because if I force 4 it would run all 4 @ 3600MT/s.

I sold those kits and temporarily was using another 32GB (16GBx2) at 6400MT/s and it was working fine with DOCP enabled or disabled while I was waiting for a new kit I ordered below:

G.SKILL Trident Z5 Royal Series 48GB (2 x 24GB) 288-Pin PC RAM DDR5 7200 (PC5 57600)F5-7200J3646F24GX2-TR5S​

• DDR5 7200 (PC5 57600)
• Timing 36-46-46-115
• CAS Latency CL36
• Voltage 1.40V

I needed more than 32GB so I settled for the 48GB kit above because the 64GB version was too expensive and I really wanted the Trident Z5 Royals.

As the video, above everything seemed to work fine until I messed with the DOCP in the BIOS:

Below was the default (I didn't touch anything) right after I swapped in the kits:

But I was curious what would happen if I enabled DOCP and it shows the following settings below:

I applied it, restarted, and hit F2/Del before windows loaded up and went back to BIOS and it seemed to boot just fine and it's now running 7200MT/s

The main issue I encountered is when I tried to disable DOCP (I was hoping by doing this will revert back to 6400MT/s) and it applied the following settings:

After doing this my computer was stuck with orange led (dram error) and no matter how long I wait or whether I swap the sticks position and rebooting. It just won't boot and I had no choice but to remove the CMOS battery since I can't reach my motherboards clear CMOS pins.

After I boot it back into the BIOS I enabled DOCP again and these are my final settings so far:

I don't know why disabling DOCP will cause my system to not boot and stuck with the orange led (dram error)? Isn't that the default setting when I initially installed the new ram kits and it defaulted to 6400MT/s? Isn't it suppose to be the other way around where by enabling DOCP it runs at 7200MT/s which would result in error and not boot due to stability with AM5?

Question is, do I just keep my system running like this at 7200MT/s, how would I know if it'll be stable or not? Should I change things? Because disabling DOCP will result in my system not booting for some reason.

Somehow I regret even messing with the DOCP settings, I could've just left it as is right after I installed the ram. It was already running at 6400MT/s which as advised is the optimal speed to run DDR5 with AM5. What should I do?

Thanks in advance for any help

 

[JayGau]

If you managed to POST after clearing the CMOS it means that your system works with DOCP disabled. And you didn't tell us what were the default settings after the CMOS reset.

When you installed the new ram without touching anything you kind of got lucky it posted. Then enabling DOCP loaded your new ram profile and it worked. But when you disabled it, the board tried to set things back to default with the "auto" values but I bet some settings from your old configuration (like FCLK and some timing values for example) were still set and were not compatible with the new "auto" values.

Now that you did a CMOS reset, you should be able to switch between DOCP enabled and disabled. If you didn't change anything else than enabling DOCP, you could try to load the default BIOS settings and look at the ram values (that would tell you the real default settings). Try to boot like this. If it works, try to enable DOCP. Reboot and see if still works. If it does, go back to the BIOS and just disable DOCP (without reloading BIOS default settings). If you can reboot like this, then puzzle solved: it was just some remnants from your old ram configuration.

By the way, the standard default speed for ddr5 is 4800 MT/s, not 6400. And there are other values that are as important as the clock speed to look at, mainly the CAS latency and the voltage. I would recommend enabling DOCP through the AI Tweaker instead of the EZ-mode if you want to keep an eye on those values.

 

[animemangamer]

Hi, thank you so much for the detailed response!

If you managed to POST after clearing the CMOS it means that your system works with DOCP disabled. And you didn't tell us what were the default settings after the CMOS reset.

Sorry I didn't realize that, ok so after running the system as is for the past couple of hours @ 7200MT/s I decided to disabled DOCP again in the BIOS and after rebooting--- It's on boot lock again with the orange dram led error. So I take out the CMOS battery again and then boot into BIOS and see that the default is actually 5600MT/s

What I didn't do is load into Windows or restart my PC, I guess I won't know if it'll continue to do the orange led dram error since I skip that step. Sorry I'm tired, I'll try it tomorrow.

What did do while I was in the BIOS was manually set the frequency to 6400

And I boot in to Windows with changing only that setting alone.

I'll post more update tomorrow/later today with your precise instructions. Thanks!