Gigabyte Z77 Overclocking Guide


Gigabyte Z77 Overclocking Guide


Yes we know we promised to stick to the important stuff, and this is very much important. Without vDroop adjustment you'll be banging your head against the wall, which isn't conducive to an enjoyable experience. The basics of overclocking are to attain the maximum speed for the smallest voltage. So there always reaches a point at which you have a system running at a certain speed at a certain voltage, which is just enough to keep it running but with less voltage the overclock will fail and the system freeze or reboot.

vDroop is when, under loading, the amount of voltage being delivered is less than required. Thankfully we can demonstrate vDroop perfectly. We have manually set the CPU voltage to 1.13 (we'll explain why on the next page) and then started OCCT, which will induce the voltage drop and show you clearly why vDroop is a very bad thing, especially for stable overclocks, and your forehead.

The stages of the loadline calibration are usually named differently on different brands so you'll have to adapt, but the end result is that you want as much loadline calibration as is available to you. If you're without the manual, or the manual is unclear, then by doing what we have done today which is set your voltage, adjust the loadline, run OCCT and view the Voltage-CPU-VCore image which help you narrow it down to the setting you require.

Of course you can always ask in our friendly forums too, but we recommend getting used to adjusting a BIOS option, saving, booting, running OCCT and adjusting. Largely because you'll be doing a lot of it on the next page, but also because this is the shortest sane overclocking guide around and we've already cut all the corners for you.


On our Gigabyte motherboard it's labelled Vcore loadline calibration. You'll usually find vDroop under loadline calibration if it isn't labelled vDroop already. Set to 'auto' you actually end up with no loadline calibration at all. With everything set as defaults except for the CPU Vcore set to 1.13v as noted above.

As you can see from the graph on the right, the moment the system comes under loading the CPU Vcore drops from 1.13v to 1.05v. For a standard CPU it's not the end of the world, but as we're not here for standard CPUs and by the end we'll be adding less than the 0.08v to attain our stable overclock, you can see how this drop would be fatal.

OC3D Intel Overclocking Guide     OC3D Intel Overclocking Guide  


There are many options for controlling the vDroop with the UD5H, but as we'll soon see you only need one. Indeed we've often commented that loadline calibration should be on all the times by default and if there is a BIOS option it should only be on or off, rather than the multi-stage affair we normally encounter. With the loadline calibration set to 'Low' we drop from 1.13 to 1.08, which is better than before but not perfect.

OC3D Intel Overclocking Guide     OC3D Intel Overclocking Guide  


High is getting much better, but there is still a hefty dropoff from 1.13v to 1.1v.

OC3D Intel Overclocking Guide     OC3D Intel Overclocking Guide  


Finally we get to Extreme, which really is misnamed. Instead of Extreme it should be labelled 'How it should be done'. As you can see as soon as the system comes under loading the voltage remains rock solid. Exactly what we need for a stable overclock.

OC3D Intel Overclocking Guide     OC3D Intel Overclocking Guide  

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Most Recent Comments

27-02-2013, 01:00:20

actually just watched all this through!

very informative mate, i think you done really well in going over the most important stuff for people who are 'new' to overclocking and want somewhere to start from!Quote

27-02-2013, 01:13:55

Very nice I have learned a lotQuote

27-02-2013, 01:34:08

Noob question - how do you get around the Welcome screen and windows sound? Quote

27-02-2013, 01:39:48

do you mean the windows 7 '4 spinning balls that turns into the windows logo' thing or the icon where your name is?

4 spinning balls thing=
type 'system configuration'
click 'boot' tab at top
tick the box marked 'no GUI boot'

if you ever want it back, simply untick.

as for the user log in bit.

delete other users and passwords.

there is a work around but i cant remember it off the top of my head as its very late, so just use google. as i remember its in regedit and its something like 'user control password'. anyway dont mess in regedit until you know EXACTLY what to change.Quote

27-02-2013, 03:08:07


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