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Author Topic: CPU Voltage Mode: Auto vs Adaptive?  (Read 92 times)

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banana999Topic starter

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CPU Voltage Mode: Auto vs Adaptive?
« on: 14-March-19, 17:30:45 »

Hi guys,

What is the difference between these 2 modes? I previously thought they were both the same and some other posts said they were the same as well, but I noticed some differences when testing.

CPU: i5-9600k, CPU Ratio 46
Motherboard: MSI Z390 Gaming Pro Carbon AC
Testing Program: Prime95 (Non AVX)

Test 1:
-Auto Mode + Auto Voltage = 1.264V VID, 1.264V Vcore 
-Adaptive Mode + Auto Voltage = 1.264V VID, 1.264V Vcore 
-This test had the same result for both

Test 2:
-Auto Mode + 1.3V = 1.264VID, 1.296Vcore
-Adaptive Mode + 1.3V = 1.304VID, 1.304Vcore

So they are not the same thing? I thought the VID was the voltage the CPU was requesting, it seems to be changing between Auto and Adaptive too, does anyone know?

Thanks
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radozd

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Re: CPU Voltage Mode: Auto vs Adaptive?
« Reply #1 on: 15-March-19, 07:52:24 »

No they are not.
In fact, I believe some modes are broken by design.
MB Z390M MAG Mortar

My tests:
*)
1) Adaptive mode + Auto voltage = 1.320
2) Adaptive + 1.320V = 1.34
3) Adaptive + 1.300V = 1.34 (!)
4) Adaptive + 1.250V = 1.34 (!!!)

*)
1) Offset mode -0.080V - ok, but it affects VIDs at monitoring software, not offsets.
2) Adaptive+offset mode. Auto, -0.080V. VIDs are not affected, offset shows correct values.
should be the same by all means

*) Last strange thing:
Offset mode -0.080V, LLC=Auto gives 1.312 VID under load, but 1.320 Vcore.
lowest LLC8 gives the same Vcore, all others give more. I thought Auto should be LLC4, not 8.

I've created a ticket about this behavior but they still can't give me the answer.
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banana999Topic starter

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Re: CPU Voltage Mode: Auto vs Adaptive?
« Reply #2 on: 17-March-19, 18:22:36 »

Ok so I saw this video

And after some more testing:
Auto mode + fixed voltage = Override mode
Auto mode + Auto voltage = Adaptive mode + Auto voltage.

Offset should be the same but with a fixed offset.
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