help! My New Ryzen 5900x's FCLK won't post above 1600MHz | MOBO is x570 Aorus Master Rev 1.2

[ItsWar]

I am having an issue with my 5900x build I just built, I can't seem to get my pc to post if I raise my FCLK clocks to anything higher than 1600MHz. Even 1600MHz I have had my pc randomly restart out of nowhere so I have to use 1500MHz. I am also having an issue with popping and crackling in my audio when I listen to anything. It seems to get worse the higher I go in FCLK clocks. I thought it was my RAM at first not allowing me to post but I am now running my XMP profile for 4000MHz CL18 and running the FCLK at 1466MHz since the crackling and popping isn't as bad as 1500MHz. I want to figure out if I need to RMA my CPU or if I am just not setting something up right in my BIOS. I have tried undervolting and overvolting my SoC and it hasn't really changed anything, I am getting a ton of WHEA errors in event viewer as well and don't know why. 

[Levent]

3 minutes ago, ItsWar said:

I am also having an issue with popping and crackling in my audio when I listen to anything

Usually a sign of low SoC and VDDG/VDDP voltages, which directly correlates to your FCLK overclock issue.

[ItsWar]

1 minute ago, Levent said:

Usually a sign of low SoC and VDDG/VDDP voltages, which directly correlates to your FCLK overclock issue.

I'm not sure how to change the VDDG/VDDP voltages, when I try to change them it wont let me put a decimal in. For example if I try to put 1.2 it will only let me do 12. 

[Levent]

Just now, ItsWar said:

I'm not sure how to change the VDDG/VDDP voltages, when I try to change them it wont let me put a decimal in. For example if I try to put 1.2 it will only let me do 12. 

AMD overclocking section is in mV, 0.9v would be 900mV, 1.2v would be 1200mV

[ItsWar]

2 minutes ago, Levent said:

AMD overclocking section is in mV, 0.9v would be 900mV, 1.2v would be 1200mV

Oh ok, I see now. What would you recommend I set them to?

[Chris Pratt]

What RAM do you have?

[ItsWar]

8 minutes ago, Chris Pratt said:

What RAM do you have?

G skill Trident Z Neo 4000MHz CL 18. I can OC my ram just fine with the XMP profile. I just can’t raise my FCLK to get it 1/1 at anything above 3200MHz because it won’t post. 

[Chris Pratt]

2 minutes ago, ItsWar said:

G skill Trident Z Neo 4000MHz CL 18. I can OC my ram just fine with the XMP profile. I just can’t raise my FCLK to get it 1/1 at anything above 3000MHz. 

Interesting, I think there's a BIOS setting that controls whether it's running 1:1 or async. It's probably defaulting to async, because the FCLK isn't capable of hitting 2000MHz on your chip. Can you try enabling XMP only, and then manually setting the memclock to 3600MHz and the FCLK to 1800MHz (leave everything else at auto), and see what happens. If that works, you can try working it up from there, but you're most likely going to cap out at 3800MHz, 3866MHz, etc.

 

[ItsWar]

16 minutes ago, Chris Pratt said:

Interesting, I think there's a BIOS setting that controls whether it's running 1:1 or async. It's probably defaulting to async, because the FCLK isn't capable of hitting 2000MHz on your chip. Can you try enabling XMP only, and then manually setting the memclock to 3600MHz and the FCLK to 1800MHz (leave everything else at auto), and see what happens. If that works, you can try working it up from there, but you're most likely going to cap out at 3800MHz, 3866MHz, etc.

 

It’s not posting with those settings I was only able to post with 4000mhz ram because I had the FCLK clocked at 1500mhz. Any time I put the FCLK at 1600mhz I get bad crackling and popping in the audio. And it doesn’t seem stable, I had a critical error that made the pc restart at 1600mhz FCLK too. 

[Chris Pratt]

Just to be clear, you've tried with lesser RAM clockspeed, still with XMP enabled? If you don't enable XMP, it won't adjust the timings and voltages properly, but you can still clock up/down the RAM while also just enabling XMP and just leaving everything else at auto.

[ItsWar]

5 hours ago, Chris Pratt said:

Just to be clear, you've tried with lesser RAM clockspeed, still with XMP enabled? If you don't enable XMP, it won't adjust the timings and voltages properly, but you can still clock up/down the RAM while also just enabling XMP and just leaving everything else at auto.

If I enable XMP and left everything at auto then I wouldn’t post unless I changed the FCLK clock to something under 1600MHz. I will try with a lower mem clock speed with XMP enabled.

[Chris Pratt]

9 minutes ago, ItsWar said:

If I enable XMP and left everything at auto then I wouldn’t post unless I changed the FCLK clock to something under 1600MHz. I will try with a lower mem clock speed with XMP enabled.

Exactly. That would be expected if the FLCK isn't capable of hitting 2000MHz. The XMP profile is going to take the RAM to 4000MHz, as you'd expect, but then the FLCK would go 2:1, which would actually be just 1000MHz. Pushing it to 1500MHz is effectively overclocking it, and that's a pretty hefty OC already, which would explain the inability to go any higher. This is just guessing, at this point, since I can't actually see what you've got in the BIOS. If you set the memclock to 3600MHz, it should easily be able to run at 1800MHz FCLK at 1:1. Then, you may be able to go higher on both, up to the limit of the FLCK for your chip (but still under 4000MHz).

[ItsWar]

33 minutes ago, Chris Pratt said:

Exactly. That would be expected if the FLCK isn't capable of hitting 2000MHz. The XMP profile is going to take the RAM to 4000MHz, as you'd expect, but then the FLCK would go 2:1, which would actually be just 1000MHz. Pushing it to 1500MHz is effectively overclocking it, and that's a pretty hefty OC already, which would explain the inability to go any higher. This is just guessing, at this point, since I can't actually see what you've got in the BIOS. If you set the memclock to 3600MHz, it should easily be able to run at 1800MHz FCLK at 1:1. Then, you may be able to go higher on both, up to the limit of the FLCK for your chip (but still under 4000MHz).

This is what the bios looks like. I reset everything to optimized defaults and only changed the xmp profile, mem mult, and FCLK frequency. Everything else is on auto. The system wouldn’t post. I’m pretty sure you are supposed to be able to get 1600MHz standard on the FLCK but mine can’t even do that and be stable without making loud cracklings and popping in the audio and throwing critical errors that restarts my system. Going even one step above 1600Mhz FCLK will not allow the system to post. 

[ItsWar]

55 minutes ago, Chris Pratt said:

Exactly. That would be expected if the FLCK isn't capable of hitting 2000MHz. The XMP profile is going to take the RAM to 4000MHz, as you'd expect, but then the FLCK would go 2:1, which would actually be just 1000MHz. Pushing it to 1500MHz is effectively overclocking it, and that's a pretty hefty OC already, which would explain the inability to go any higher. This is just guessing, at this point, since I can't actually see what you've got in the BIOS. If you set the memclock to 3600MHz, it should easily be able to run at 1800MHz FCLK at 1:1. Then, you may be able to go higher on both, up to the limit of the FLCK for your chip (but still under 4000MHz).

Hahaaaa, I figured it out. I have no idea why but I had a hunch that if I unplugged one of the 8 pin 12 volt power connectors to my cpu it would fix it… and whatya know lol. It’s working fine now when I tried posting at the same setting as shown above. I don’t know how or why that fixed it but I’m happy lol. No audio popping or anything, I am going to try 2000 FLCK now.

[ItsWar]

5 minutes ago, ItsWar said:

Hahaaaa, I figured it out. I have no idea why but I had a hunch that if I unplugged one of the 8 pin 12 volt power connectors to my cpu it would fix it… and whatya know lol. It’s working fine now when I tried posting at the same setting as shown above. I don’t know how or why that fixed it but I’m happy lol. No audio popping or anything, I am going to try 2000 FLCK now.

2000MHz FLCK is working flawlessly. Thanks for trying to help me!