- Jan 28, 2005
- 2,146
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There's a discussion on another forum regarding the Asrock Extreme4 and Extrme6 boards. Apparently, they don't report the correct CPU voltage. This has been confirmed by several owners using a DMM. It even affects stock settings.
I have a Extreme6 I got on that one day deal with a i5-3570K for 240.00. I don't really need to overclock this rig, its for a HTPC, but I'm interested in lowering temps as much as possible since it will be in a warm environment.
So, Id like to undervolt it at stock frequencies.. Given my brief tests below, Im pretty sure its not reporting accurate voltages. Some seem too low to be true. The good thing is temps are indeed reduced over stock settings .As soon as I locate my DMM, Ill know for certain.
.
Now, Im not sure the best way to do this. In the bios, I can set the CPU volts to manual, something like 1.040 V for now, and then test for stability. But how about using negative offset?
How about PLL?, should that be lowered to something like 1.586 V?
Then leave everything else at default in the bios?
Some Testing Here:
FIRST
Stock bios settings::With all auto settings, prime95 running, CPUZ says 1.144 core volts
NEXT::
CPU voltage fixed at 1.040V, PLL set at 1.586V
with prime95, 100% core usage, CPUZ says Core voltage is .984 V, temps at 50C.
Core voltage reported by CPUZ at idle actually goes up to 1.032V, is this what is called Vdroop while under load?
NEXT::
Results with CPU volts in offset mode in the bios, offset of 0.195V, prime 95, CPUZ says voltage is at .968V while under load. Temps about 50C
CPU in Offset mode in bios, and a offset of 0.195V, while at idle, CPUZ says volts are .840..wow, that sounds low
And no, I have tested long enough yet to ensure stability....
I have a Extreme6 I got on that one day deal with a i5-3570K for 240.00. I don't really need to overclock this rig, its for a HTPC, but I'm interested in lowering temps as much as possible since it will be in a warm environment.
So, Id like to undervolt it at stock frequencies.. Given my brief tests below, Im pretty sure its not reporting accurate voltages. Some seem too low to be true. The good thing is temps are indeed reduced over stock settings .As soon as I locate my DMM, Ill know for certain.
.
Now, Im not sure the best way to do this. In the bios, I can set the CPU volts to manual, something like 1.040 V for now, and then test for stability. But how about using negative offset?
How about PLL?, should that be lowered to something like 1.586 V?
Then leave everything else at default in the bios?
Some Testing Here:
FIRST
Stock bios settings::With all auto settings, prime95 running, CPUZ says 1.144 core volts
NEXT::
CPU voltage fixed at 1.040V, PLL set at 1.586V
with prime95, 100% core usage, CPUZ says Core voltage is .984 V, temps at 50C.
Core voltage reported by CPUZ at idle actually goes up to 1.032V, is this what is called Vdroop while under load?
NEXT::
Results with CPU volts in offset mode in the bios, offset of 0.195V, prime 95, CPUZ says voltage is at .968V while under load. Temps about 50C
CPU in Offset mode in bios, and a offset of 0.195V, while at idle, CPUZ says volts are .840..wow, that sounds low
And no, I have tested long enough yet to ensure stability....
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