Asrock B450 board doesn't have core offset?

sgoaty

sgoaty

sgoaty

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I'm trying to get to the bottom of some stability issues with a 3900X CPU it's never crashed on me with normal usage but fails Y cruncher after a few hours at most.

I've tried using a 3600 memory kit, a different 3200 memory kit and that same kit at 2133 it's made no difference.

The board I'm using is an Asrock B450m -HDV R4.0

I was hoping to try giving it a slight voltage boost using curve optimiser ( this made my 5950x stable a while back) but I can't find the settings for it anywhere.

I've tried the latest bios then rolled back to the latest non beta bios (but they still don't come up in PBO or anywhere else. Does this board just not support it?

Can anyone suggest another way to try and get this cpu stable? I would rather not lock the frequency and voltage but perhaps that's my only option on this board?
Thanks
Scott
 
It is a basic board so it's to be expected to have a lot of options missing in the bios. I wonder if the board is just not up to the job of running a 3900x with it's limited power phases and bare vrm's at the top? I don't suppose you can view vrm temps can you? I wonder if the board detects that it's running a 105w cpu (the max for the board) and certain options become unavailable?
 
Just checked the vrm temps and only getting 72c with an infrared heat gun. Also package power hasn't exceeded 95w.

Power reporting deviation is the only figure which looks to be a concern ( even though I don't fully understand it) it's minimum is 69.4% and is currently 81.6% with an 80% average.
 
It's seems like the board has hard 95w power limit no matter how I set it. Possibly is just a less than ideal match!
 
Well curiousity got the best of me and I swapped the CPU into my other board. It's now getting on for 8 hours stable in Y cruncher pulling up to 170W.

Looks like you guys are right, the board just doesn't work with that chip as it's trying to boost further than the 95w will support.

Seems to work ok in eco mode but who want that haha.
 
as an additional bonus now you have the 3900x in a more suitable board you now have the not so power capable board which would possibly still do a decent job of running something a bit less demanding doing less demanding stuff which i guess being a 450 is more what it was intended for
 
I had to take my 5900x out of the x570 board so if I'm to keep the 3900x I'll have to put it in a better board :)
 
sgoaty said:
Well curiousity got the best of me and I swapped the CPU into my other board. It's now getting on for 8 hours stable in Y cruncher pulling up to 170W.

Looks like you guys are right, the board just doesn't work with that chip as it's trying to boost further than the 95w will support.

Seems to work ok in eco mode but who want that haha.
Click to expand...

You could try setting an offset with the Asrock board, but I don't see it helping much. The chips probably don't need as much power as they're trying to draw, I'd be surprised if you couldn't manage - 20-30 per core but it could equally be a needless faff if you've other motherboard options.

I would be interested in the results from a purely academic point of view however, although note you'd need to use the aforementioned PBOtuner app.
 
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I was just looking to get it stable and it's mission accomplished with the better board.

There's no options for setting the offset on the asrock board unfortunately.
 
sgoaty said:
I was just looking to get it stable and it's mission accomplished with the better board.

There's no options for setting the offset on the asrock board unfortunately.
Click to expand...

Aye, I've the same on a B450 Pro 4 and a 5800X3D setup, it's why I use PBOTuner for it lol.

Works but still a bit of a faff, but then I got the motherboard for a song and its been rock solid stable so I wont complain.
 
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