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DRAM voltage

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Godzilla

Member
Joined
May 31, 2003
Location
UK
i have my DRAM voltage set to 1.64v in BIOS, but according to HW Monitor it fluctuates between 1.67 and 1.69v on load!

Is this normal?
 

redduc900

Inactive Moderator
Joined
Dec 17, 2000
Location
Portland, OR
I wouldn't put too much faith in HWMonitor for reading the correct DRAM voltage from within Windows. Instead read the voltage from the 'Power' screen--> Voltage Monitor--> DRAM Bus Voltage in the BIOS.
 
OP
Godzilla

Godzilla

Member
Joined
May 31, 2003
Location
UK
what does the DRAM voltage have to be within 0.5v of? or is it 0.05v?
 

redduc900

Inactive Moderator
Joined
Dec 17, 2000
Location
Portland, OR
The voltage differential between the DRAM Bus voltage and the QPI/VTT (or Uncore depending on the BIOS) voltage needs to be <= 0.5V. Default QPI/VTT voltage is 1.15 - 1.2V, w/ default DRAM voltage normally at between 1.64 - 1.66V. The absolute maximum DRAM voltage as spec'd by Intel for the i7 920 is 1.875V, which means no more than 1.35 - 1.375 QPI/VTT voltage. Although you'll see plenty of folks running considerably higher than 1.35V Uncore, like upwards of 1.5 or more for higher BCLKs and DRAM frequency of > 2000MHz.
 
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