5800x in a B450 gaming plus max, works if CPU ratio set, reboots if not

agentorange65 · 23 Feb 2024 at 12:34

So have recently upgraded the CPU in my system from a 3600 to a 5800x.

Updated the Bios, Changed over the CPU from a 3600, all appeared well. then my eldest told me that the machines was restarting when playing Minecraft.

So did jumped in to test, and finding system is rebooting a minute or so into heavy processing games (dishonoured 2 would reboot as soon as you clicked continue from the menu, Horizon zero dawn would get to the game for a minute or so, then boot you out to the spalsh screen. Weirdly found that Ryzen Master would also reboot the machine if you asked it to stress test. All other stress tests I tried (Prime95, Furmark) did not cause any instability in the machine.

After trawling the internet, uncovering a massive rabbit hole to fall down and attempting multiple fixes, stumbled upon changing the CPU ratio, starting at 36, then moving up in increments to 46. which is will quite happily stay at without issue - Minecraft was on for 3 hours and no issue. Dishonored 2 ran perfectly without issue.

have tried the following:

re-pasted the CPU
tried multiple RAM configs (4x8gb, 2x8gb, 1x8gb)
turning off XMP, turning off PBO and turning off CPB
reset windows
set the PBO limits attempting multiple variants for PPT TDC and EDC (115, 90, 105 -and 125,75,110)
added a Curve to all cores -20 and -30
CPU core voltage set to AMD overclocking

Crazy thing is nothing stops it from rebooting under very certain circumstances, apart from setting the CPU ratio. Slightly concerned to have the CPU running at full chat 24/7.

GPU: Gigabyte GAMING OC GeForce RTX 3060 12GB
CPU: RYZEN 7 5800X 8 CORE 16 THREADS
Motherboard: MSI B450 Gaming Plus MAX
BIOS Version: H.K0 (latest bios)
RAM: 2x8GB Patriot DDR4-3200 CL18 and 2x8GB G SKill DDR4-3200 CL16
PSU: Corsair TX650M 650 W 80+ Gold semi modular
Case: Phanteks Eclipse P400A
Operating System & Version: WINDOWS 11 PRO 23H2
GPU Drivers: GEFORCE GAME READY DRIVER - WHQL Driver Version: 551.52
Chipset Drivers: AMD B550 CHIPSET DRIVERS VERSION 6.01.25.342
Background Applications: CHROME, GOG Galaxy

Anyone able to suggest anything else I can try? I am suspecting that i should upgrade the ram to 2x16 at 3600, but also thinking that the b450 motherboard might be the issue as well. Should i amend the voltage if i the CPU is running at 4.6ghz the whole time it is on?

Thanks in advance!

Tetras · 23 Feb 2024 at 13:00

agentorange65 said:
Anyone able to suggest anything else I can try?

Shouldn't your curve be + if you want to increase the minimum voltage? I thought - was an undervolt?

agentorange65 · 23 Feb 2024 at 15:26

Additional troubleshooting:

amended the voltage - a slight underclock of 0.0125 got into game for a few seconds, anything more would cause it to crash in game menu

Tetras · 23 Feb 2024 at 16:05

agentorange65 said:
Should i amend the voltage if i the CPU is running at 4.6ghz the whole time it is on?

If you disable some of the C-States in the BIOS and unstick the multiplier, it might help if the problem is instability from changing power states. From what I can recall, some B450 boards don't push enough voltage for lower power states with some Ryzen CPUs, though.. it is not uncommon to have a faulty CPU that just need replacing.

agentorange65 said:
turning off XMP, turning off PBO and turning off CPB

When XMP is enabled, did you check the DRAM voltage was being set correctly?

agentorange65 said:
RAM: 2x8GB Patriot DDR4-3200 CL18 and 2x8GB G SKill DDR4-3200 CL16

Are these running either/or, or both together? If they're running together, I'd increase the DRAM voltage a bit. The CPU's memory controller is only rated to 2933 with 4 single rank sticks (2667 with dual rank).

Threepwood · 23 Feb 2024 at 18:28

agentorange65 said:
to a 5800

second hand?

agentorange65 · 23 Feb 2024 at 19:47

Tetras said:
If you disable some of the C-States in the BIOS and unstick the multiplier, it might help if the problem is instability from changing power states. From what I can recall, some B450 boards don't push enough voltage for lower power states with some Ryzen CPUs, though.. it is not uncommon to have a faulty CPU that just need replacing.

C-State has been disabled, and i turned off Eco as well

Tetras said:
When XMP is enabled, did you check the DRAM voltage was being set correctly?

not sure, what that should be - another rabbit hole methinks....

Tetras said:
Are these running either/or, or both together? If they're running together, I'd increase the DRAM voltage a bit. The CPU's memory controller is only rated to 2933 with 4 single rank sticks (2667 with dual rank).

tried in multiple configs, currently all running together. will up the dram voltage

agentorange65 · 23 Feb 2024 at 19:48

Threepwood said:
second hand?

yep, but returnable (will probably set to a static clock of 4.4 or something and leave it until i can get a B550 if i cant resolve)

Tetras · 23 Feb 2024 at 20:07

agentorange65 said:
not sure, what that should be - another rabbit hole methinks....

3200/CL16&CL18 sticks are usually 1.35v, but you can check with CPU-Z and look at the SPD tab, which will tell you what voltage the XMP profiles are supposed to use for each stick.

agentorange65 · 23 Feb 2024 at 20:41

Tetras said:
3200/CL16&CL18 sticks are usually 1.35v, but you can check with CPU-Z and look at the SPD tab, which will tell you what voltage the XMP profiles are supposed to use for each stick.

Tab said 1.35, on auto in the bios it was around 1.67? Set it to 1.35v and rebooted, think I went as high as 1.40v and again rebooted

Tetras · 23 Feb 2024 at 21:20

agentorange65 said:
Tab said 1.35, on auto in the bios it was around 1.67?

Are you sure? That's insanely high, maybe even enough dram volts to kill the sticks!

agentorange65 · 24 Feb 2024 at 21:20

Tetras said:
Are you sure? That's insanely high, maybe even enough dram volts to kill the sticks!

Sorry, got confused. 1.368 is what auto sticks it on

agentorange65 · 15 Mar 2024 at 08:54

quick update on changes:

So have changed over to a B550 board (MSI B550-A pro), still got the same issue occurring, with the same workaround - setting the clock to a static number
completely re-installed Windows, Windows final staged did not want to finish up with the clocks on auto, only way i was able to get into windows was setting to 4200ghz

alec · 15 Mar 2024 at 10:30

All signs point to bad CPU
As a last test, I would try positive +30 Curve Optimiser - to get more voltage at all dynamic clock points

agentorange65 · 15 Mar 2024 at 21:28

alec said:
All signs point to bad CPU
As a last test, I would try positive +30 Curve Optimiser - to get more voltage at all dynamic clock points

You know, I don't want to jinx it, but I think that did it! Nothing crashed as of yet. Thank for your help all, I know have a stableish baseline

alec · 16 Mar 2024 at 08:02

agentorange65 said:
You know, I don't want to jinx it, but I think that did it! Nothing crashed as of yet. Thank for your help all, I know have a stableish baseline

Well all it tells you is that other components should not be blamed
Normally a CPU should be stable at stock settings and not require additional voltage.