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PortAh
Beginner
482 Views

DQ67SW dram voltage

On a DQ67SW B3 mobo, I have 2x4GB DDR3-1600 on it. The mobo runs it at 1333MHz.

 

SPD:

Module Nominal Voltage (VDD):      1.5 V

 Supported Module Timing at 800.0 MHz:  9-9-9-28

 Supported Module Timing at 733.3 MHz:  9-9-9-26

 Supported Module Timing at 666.7 MHz:  8-8-8-24

 Supported Module Timing at 600.0 MHz:  7-7-7-21

 

hwinfo64 sensor report current memory timing 666Mhz 8-8-8-24 which is expected.

 

What I dont understand is why it reports dram voltage @ 1.766v

 

Isnt it too high, and supposed to be around 1.5v?

 

Is it a faulty sensor or it is normal to be at 1.766v running at a supported SPD timing.

 

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7 Replies
PortAh
Beginner
98 Views

n_scott_pearson
Super User Retired Employee
98 Views

If the board is using 1.766v, then it was told by the SPD to use it (it would use 1.5V otherwise). Look at the SPD specification displayed by BIOS Setup for 1600 and see what voltage it lists there.

...S

PortAh
Beginner
98 Views

BIOS set at auto, it picks 8-8-8-24 and shows voltage at 1.5v.

On another BIOS page where it shows "memory vcc", allows you to set under/over voltage alert, current voltage is also detected as ~1.5v.

Now, I then change the voltage in BIOS to 1.4v, BIOS now detects as ~1.4v.

It boots win10 fine and hwinfo64 now shows it is running at 1.69v(so it does come down).

 

I tried aida64, it reports the same values as hwinfo64.

 

Which number to trust, is it BIOS detected values or these common tools(hwinfo64/aida64)?

 

On a side note, I also see CPU temperature detection discrepancy between BIOS and tools, 65c vs 36c respectively.

 

 

n_scott_pearson
Super User Retired Employee
98 Views

Oh, I think you can trust these tools; that isn't the issue.

Does the BIOS tell you what voltage​ is actually listed in the SPD for the 1600 entry?

In BIOS Setup, all power management and interrupts are disabled. This means processor is spinning its wheels, executing code, while waiting for input. In the O/S, on the other hand, power management and interrupts are enabled. Power is limited and processor is often halted when waiting for input. Bottom line, temperature is going to be significantly higher when in BIOS Setup. You can't conclude anything from this.

...S

PortAh
Beginner
98 Views

BIOS does not list the SPD entry for 1600.

However, it does list the SPD 1333 entry being used 8-8-8-24 and voltage is 1.5v.

n_scott_pearson
Super User Retired Employee
98 Views

Have you tried doing a complete reset of the BIOS Configuration​? In BIOS Setup, press F9 to do this and then F10 to exit with save.

H​ope this helps,

...S

PortAh
Beginner
98 Views

Hi Scott,

 

Yes, I did "load BIOS defaults F9 and save F10" before I looked into this ram voltage thing.

(Re: my other thread https://forums.intel.com/s/question/0D50P00004LSoJDSA1/dq67sw-bios-pch-temp-shows-0-intel-me-menu-mi...)

I just did it again. BIOS is using a SPD entry 8-8-8-24 @ 1.5v. See here https://drive.google.com/open?id=1hNNA7utGjBS3ju5xwbRhykSNDn91nJWn

 

BIOS voltage monitoring here https://drive.google.com/open?id=1vpDF6YszrOM9gXI1R2XgGwvY-1807iCg

It is reading 1.47v.

 

However, in Win10 hwinfo64 or aida64, it shows 1.766v.

 

In the meantime, I changed the BIOS mem voltage to 1.25v, resulting in hwinfo64/aida64 => 1.507v, which I hope is the voltage really driving the ram. I ran some stability test and so far it's fine. Maybe just keeping it this way.

 

Thanks.

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