Question New build with an RTX 3080 - constant spikes/stuttering/clock drops with any game

[mattcaves]

Hey wonderful people! if anyone with experience would be able to help me pin down the problem with my new rig I'd very greatly appreciate it, I haven't been able to work this week
this problem doesn't occur with a capped framerate but I'm doing some real-time graphics work and I often need to keep things running at max when testing.

Basically when running any 3d application with an uncapped framerate I'm getting huge spikes, a stable 170 frames would go down to 15 for a few seconds, and this happens every 8 seconds or so. GPU-Z stats are telling me that all temperatures are fine, and the PerfCap was triggered by VRel Vop, or not enough voltage.

https://imgur.com/a/clcD2cg

View: https://imgur.com/a/clcD2cg


Here are some threads with the same issue that weren't resolved:
https://forums.tomshardware.com/thr...d-games-stutter-then-come-back-again.3753122/
https://www.techpowerup.com/forums/threads/rtx-3090-unstable-performance.286810/page-2
https://linustechtips.com/topic/1437891-rtx3070-fps-drops-and-stuttering/

Things I've tried

• Swapped out GPU for a different model
• Upgraded Power supply to 850W gold
• updating bios/windows/drivers
• changed pcie to gen 3 in bios
• undervolting GPU

Specs

• MSI Ventus3x RTX 3080 10GB
• Ryzen 9 5900X
• 32GB ddr4
• Biostar b550mh mobo
• 2tb m.2 gen 4 ssd

What I might look into

• downgrading to a weaker GPU (not preferable)
• swapping out other parts, in case there's some sort of bottleneck
• other bios tweaks

Any help or consideration is very much appreciated!

 

[MEMOFLEX]

Can you provide the make and model of the PSU?

 

[mattcaves]

Can you provide the make and model of the PSU?

It's a corsair RM850 gold.

Also just noticed that the CPU is being throttled as well. here's a snapshot of hwinfo:

https://imgur.com/a/QPvPC9G

View: https://imgur.com/a/QPvPC9G

 

[MEMOFLEX]

Having looked at the motherboard it does look quite a basic board. Is the power delivery sufficient to be running a 5900x?

It does look like it has quite a weak VRM -

BIOSTAR B550MH Motherboard Review

We review the sub-$100 BIOSTAR B550MH Motherboard based on AMD B550, but does it offer enough for entry into the modern Ryzen platform?

www.thefpsreview.com

 

[mattcaves]

Having looked at the motherboard it does look quite a basic board. Is the power delivery sufficient to be running a 5900x?

It does look like it has quite a weak VRM -

BIOSTAR B550MH Motherboard Review

We review the sub-$100 BIOSTAR B550MH Motherboard based on AMD B550, but does it offer enough for entry into the modern Ryzen platform?

www.thefpsreview.com

Power delivery is sufficient I'm sure but it must be something to do with the combination of a 3080. tried some software tricks without any luck so I decided i'll go ahead with a motherboard replacement, fingers crossed 🤞

Thanks for taking the time to research the board 😊

 

[MEMOFLEX]

Power delivery is sufficient I'm sure but it must be something to do with the combination of a 3080. tried some software tricks without any luck so I decided i'll go ahead with a motherboard replacement, fingers crossed 🤞

Thanks for taking the time to research the board 😊

It is the first thing that jumped out at me when I looked at the motherboard as it is budget offering. Whilst it will advertise it supports 5000 series processors there is only a weak VRM on board that has no heatsinks so it could be a thermal issue as well depending on airflow in your case. When you put a sustained load through the CPU it could be struggling. Especially with a 5900x.

Are there any temps provided for the board via HWInfo?

 

[RodroX]

I am at work, so I can not see the image you provided, but far as I can tell....

• We have no idea what games are you having issues with.
• No clue on what resolution and details level are you using.
• No info on the PC case brand and model, nor how are the case fans installed inside of it.
• No idea how are you cooling the R9 5900X.
• Do not know whats the RAM configuration, I'm guessing is 2x16GB?, nor brand and model.
• Are you using Windows 10 or Windows 11?
• How old is this system?
• Did the PC ever worked without issues running 3D applications with the components you described?

Besides everything else, If you can, donwload and run userbenchmark (https://www.userbenchmark.com/) and please post link to the full results of the test. So we can click on it and check the information.

And yeah, thats a very basic looking motherboard for such a high-end system.

 

[mattcaves]

I'd answer all those questions but, we cracked it! It was the motherboard. Got an asus tuf b550m plus and I can finally get back to work doing graphics tests.
The new asus is far better for cable management and for fitting extra things in pcie slots too. thanks everyone for the help, and memoflex for helping research

for those scrolling through, If you're getting a ridiculously powerful gpu then don't skimp out on a motherboard, lesson learned 🙃

 

[RodroX]

I'd answer all those questions but, we cracked it! It was the motherboard. Got an asus tuf b550m plus and I can finally get back to work doing graphics tests.
The new asus is far better for cable management and for fitting extra things in pcie slots too. thanks everyone for the help, and memoflex for helping research

for those scrolling through, If you're getting a ridiculously powerful gpu then don't skimp out on a motherboard, lesson learned 🙃

I believe the GPU was not to blame here, the VRM on the asrock mobo was probably not able to deliver enough stable power to the CPU and so this R9 5900X was throttling down.

But yeah according to some reviews I saw the TUF B550M PLUS have a stronger VRM.