- Jul 15, 2001
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I've observed that when I set my 2500K to 4.6Ghz on my Asrock Z68 Extreme 4 MB using the auto turbo preset that it sets the offset voltage to +0.075V. I'm assuming it does this by setting the vcore and other parameters, i.e., Additional Turbo Voltage, by adding offset voltage to my CPUs VID to obtain a stable overclock.
On another forum someone stated that to set the vcore offset mode first determine a stable vcore for your specific CPU speed using the fixed vcore method and then subtract your VID from that to get your starting offset voltage.
Which VID, the idle or load VID at stock bios settings? According to CoreTemp V1.0, my stock VID at idle is 1.2360V and at stock load it's 1.2710V.
Edit: These VIDS were not at stock but at 3.4Ghz load due to my MB setting the multiplier to 34 at its default bios setting.
I found using the fixed vcore method that I need 1.330V (CPU-Z) to be stable at 4.6Ghz.
The auto turbo sets it a tad higher at 1.340V load, VID is 1.2610V idle, 1.4111V load.
I also found that setting the offset voltage to +0.075V with +0.027V additional turbo voltage, or +0.080V offset voltage, is stable at 4.6Ghz at LLC level 5.
So what would I subtract from what to get a start point for offset voltage?
On another forum someone stated that to set the vcore offset mode first determine a stable vcore for your specific CPU speed using the fixed vcore method and then subtract your VID from that to get your starting offset voltage.
Which VID, the idle or load VID at stock bios settings? According to CoreTemp V1.0, my stock VID at idle is 1.2360V and at stock load it's 1.2710V.
Edit: These VIDS were not at stock but at 3.4Ghz load due to my MB setting the multiplier to 34 at its default bios setting.
I found using the fixed vcore method that I need 1.330V (CPU-Z) to be stable at 4.6Ghz.
The auto turbo sets it a tad higher at 1.340V load, VID is 1.2610V idle, 1.4111V load.
I also found that setting the offset voltage to +0.075V with +0.027V additional turbo voltage, or +0.080V offset voltage, is stable at 4.6Ghz at LLC level 5.
So what would I subtract from what to get a start point for offset voltage?
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