AMD Curve Optimiser - Won't save in BIOS

[Mike_J_Smith]

I'm trying to add an undervolt using Curve Optimiser, but whenever I set something in BIOS (eg set it to negative 5), when I save & quit BIOS it tells me that I've not made any changes to the BIOS.

And then when I boot, it seems to have had no effect. I've tried - 5, 10, 15 and now just for fun -50, but CPU voltage hasnt changed and my computer is stable.

Any ideas what might be causing this?

Cheers.

 

[916Mick]

Mike,
we'll need to know
motherboard make and model
operating system ie windows 10 64x
cpu model

 

[Joxeon]

It doesn't show as saving in my msi board although it does apply as the voltage is lower when running cinebench.

 

[Mike_J_Smith]

Mike,
we'll need to know
motherboard make and model
operating system ie windows 10 64x
cpu model

MSI X570 Tomahawk, 5800x and Windows 10 64; thanks

It doesn't show as saving in my msi board although it does apply as the voltage is lower when running cinebench.

interesting, I’ll double check. Is that just by checking max during the run or eyeballing an average?

 

[DoneADougalOnSofa]

Just to check, is it a drop-down menu to select the curve, or do you type in a number?
If it's type-the-number, maybe you need to hit Enter after, err, entering it.

 

[Joxeon]

MSI X570 Tomahawk, 5800x and Windows 10 64; thanks


interesting, I’ll double check. Is that just by checking max during the run or eyeballing an average?

Yeah just look at the CPU Core Voltage (SVI2 TFN) in hwinfo while running R20.

 

[Mike_J_Smith]

Just to check, is it a drop-down menu to select the curve, or do you type in a number?
If it's type-the-number, maybe you need to hit Enter after, err, entering it.

Ha, I will try that!

 

[mikehhhhhhh]

So, in my experience on the Tomahawk with the latest 1.1.9 BIOS, the AMD Overclocking screen under "Settings" does nothing.

There's a slightly different AMD Overclocking screen under "OC" that works great.

 

[Mike_J_Smith]

So, in my experience on the Tomahawk with the latest 1.1.9 BIOS, the AMD Overclocking screen under "Settings" does nothing.

There's a slightly different AMD Overclocking screen under "OC" that works great.

Oh yeah, hadn’t seen that. There’s no curve optimiser in that section though.

Yeah just look at the CPU Core Voltage (SVI2 TFN) in hwinfo while running R20.

ok thanks, mine doesn’t seem to change at all.

 

[mikehhhhhhh]

Oh yeah, hadn’t seen that. There’s no curve optimiser in that section though.

There is on mine.

Are you running latest bios and have PBO turned on?

 

[Mike_J_Smith]

There is on mine.

Are you running latest bios and have PBO turned on?

Yes, latest non beta version anyway. Are you using the beta version?

 

[mikehhhhhhh]

Yes, latest non beta version anyway. Are you using the beta version?

yeah, latest beta with AGESA 1.1.9

 

[Mike_J_Smith]

yeah, latest beta with AGESA 1.1.9

Ah brilliant thanks. I was worried about flashing with a beta bios; gonna do that now

 

[mikehhhhhhh]

Ah brilliant thanks. I was worried about flashing with a beta bios; gonna do that now

Ive run it since the day I got the board. It’s been stable for me.

I had to upgrade to get my rams XMP profile stable.

 

[Mike_J_Smith]

Ive run it since the day I got the board. It’s been stable for me.

I had to upgrade to get my rams XMP profile stable.

So good news: The BIOS update worked and now at least saves curve optimiser changes
Bad news: The changes still don't seem to have any effect. I've tried 0 through to -15, running Cinebench R20 and logging the core voltage from HWInfo and the core voltage basically doesnt change at all.

I'm not clued up enough about how the optimiser works, but that doesn't seem right to me?