CPU core and NB voltage in regard to RAM stability?

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r00tb33r

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I'm curious if CPU voltage or NB voltages have any effect in regard to RAM stability. I tend to buy "energy efficient" versions of CPU which have lower voltages and lower TDP, but I wonder if it's detrimental to stability of cheap/crappy RAM.

Thoughts?
 
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Tradesman1

Tradesman1

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Depends on the rig, older 775 mobos were very dependent on the NB as it help the MC (memory controller), newer rigs have the MC in the CPU and generallly a different voltage to 'help' the MC, on AMD rigs it's generally the CPU/NB voltage on Intel it's often the VCCIO, DDRVTT, CPUVTT or the VCCSA voltage
 
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r00tb33r

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So say it's AM2/AM3, there's CPU core, and I think at least two different NB voltages. Do these affect voltage levels of RAM signals, like the data bus, address strobe, CAS/RAS. etc?
Or are AM2/AM3 machines not as sensitive to that?
 
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r00tb33r

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Mobo is GA-MA770-UD3 rev 2.1, yes, like I said earlier NB and core voltage setting is separate and I think NB has two different fields. I'll see what the names are for the NB settings on next reboot - running memtest86+ right now.
 
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r00tb33r

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So the voltage settings that I can set manually are:
DRAM Voltage control
NB Voltage control
NB PCIE Voltage control
CPU NB VID control
CPU Voltage Control

So which NB voltage adjustment do you think may help with RAM stability (aside from the DRAM voltage, which is obvious). Which one is relevant to the RAM controller?
 
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