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Haswell Overclock Thread
- Thread starter Wucked
- Start date
What voltage setup are you using now? Negative or positive offset? You have a good chip matched with good cooling now you've delidded it
Hmmm, just reading this guide here...
http://www.overclockers.com/3step-guide-to-overclock-intel-haswell
and noticed this section...
"Letting Your CPU Breathe
Now that you have your CPU dialed in, let’s talk about the way you apply voltage to it. So far we’ve only spoken about manually setting voltage and for the purposes of finding your maximum stable overclock, that’s fine and dandy. However, when your CPU isn’t under load, you don’t necessarily want it running at its max stable overclock with a constant voltage applied. So while we’ve covered manual voltage settings, there are two other options that might serve you better.
Offset Voltages
Offset voltages do just what you think it does – offsets the voltage +/- the amount you set. It takes the standard Intel voltage curve and just raises the whole darn thing, top to bottom. While this is better on your CPU than just a manually applied, constant voltage -and it used to be the best option for not running manual voltage- it’s not the best option any more.
Adaptive Voltage
Adaptive voltage is a lot smarter than your average offset voltage. What it does is raise the part of the voltage curve that you need under load, but leaves the lower end of the curve (when the CPU is operating at 800 MHz) alone. Thus, the higher voltage you need is there when the CPU calls for it, but you have no increase in idle voltage at all. This is going to be the best choice for letting your CPU breathe, as it were, when idle. You set the maximum voltage you want the CPU to get and go on your merry way knowing the CPU can draw the voltage it needs when it needs it."
Haven't noticed an Adaptive Voltage setting on my Gigabyte mobo
http://www.overclockers.com/3step-guide-to-overclock-intel-haswell
and noticed this section...
"Letting Your CPU Breathe
Now that you have your CPU dialed in, let’s talk about the way you apply voltage to it. So far we’ve only spoken about manually setting voltage and for the purposes of finding your maximum stable overclock, that’s fine and dandy. However, when your CPU isn’t under load, you don’t necessarily want it running at its max stable overclock with a constant voltage applied. So while we’ve covered manual voltage settings, there are two other options that might serve you better.
Offset Voltages
Offset voltages do just what you think it does – offsets the voltage +/- the amount you set. It takes the standard Intel voltage curve and just raises the whole darn thing, top to bottom. While this is better on your CPU than just a manually applied, constant voltage -and it used to be the best option for not running manual voltage- it’s not the best option any more.
Adaptive Voltage
Adaptive voltage is a lot smarter than your average offset voltage. What it does is raise the part of the voltage curve that you need under load, but leaves the lower end of the curve (when the CPU is operating at 800 MHz) alone. Thus, the higher voltage you need is there when the CPU calls for it, but you have no increase in idle voltage at all. This is going to be the best choice for letting your CPU breathe, as it were, when idle. You set the maximum voltage you want the CPU to get and go on your merry way knowing the CPU can draw the voltage it needs when it needs it."
Haven't noticed an Adaptive Voltage setting on my Gigabyte mobo
That's right lettuce,cos offset would raise idle voltages very slightly on z77,but with haswell and the newer lower idle states I suppose adaptive offset is better as it won't affect the new lower idle clocks/volts
might be different for haswell
on my z77 im using +0.165v offset for 4.8ghz so seems about right,the lower vid your cpu is the more you'll need each chip varies in how much voltage it needs to be stable
remember you can use a higher level llc and use a lower offset and vice versa
offset= cpu can downclock at idle in speed/volts
fixed = full speed/volts 24/7
im always a big fan of offset,its much kinder to the cpu imo
on my z77 im using +0.165v offset for 4.8ghz so seems about right,the lower vid your cpu is the more you'll need each chip varies in how much voltage it needs to be stable
remember you can use a higher level llc and use a lower offset and vice versa
offset= cpu can downclock at idle in speed/volts
fixed = full speed/volts 24/7
im always a big fan of offset,its much kinder to the cpu imo
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Just increase CPU offset to +0.165 which gave me 1.282v in CPU-Z and OCCT lasted about 3 minutes before it blue screened. Im not really comfortable going higher volts than this really, despite the temps not going about 72c on any cores, so think 4.6 is the happy medium for me
I got the, GA-Z87X-UD5H.
Just seems strange that i have to change the CPU offset value a lot for it to change the voltage that CPU-Z reports, for example i change CPU offset to +0.175 and it still reported the same voltage in CPU-Z as +0.165 CPU Offset did
EDIT: Hmmm have gone back to my 4.6Ghz setting and have enabled:
Hyper-Threading Technology
C1E
C3/C6 State
CPU Thermal Monitor
EIST
And whilst CPU-Z reports that the voltage drops when the system is idle the clock speed does not and stays at 4.6Ghz, any ideas why?
Just seems strange that i have to change the CPU offset value a lot for it to change the voltage that CPU-Z reports, for example i change CPU offset to +0.175 and it still reported the same voltage in CPU-Z as +0.165 CPU Offset did
EDIT: Hmmm have gone back to my 4.6Ghz setting and have enabled:
Hyper-Threading Technology
C1E
C3/C6 State
CPU Thermal Monitor
EIST
And whilst CPU-Z reports that the voltage drops when the system is idle the clock speed does not and stays at 4.6Ghz, any ideas why?
Last edited:
