ChIck3n

Hi, I did the pencil mod on my 780i and wanted to make sure I did it correctly. In the BIOS I have my voltage set to 1.3625. While idling CPU-Z shows my voltage to be 1.344 and when I run prime it goes up to 1.352. Is this a successful mod? Is there any way to get it to be exactly 1.3625 volts (and would this help my OC)? Thanks. Oh, BTW I am at 3.9GHz now.

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mothergoose729

Sounds good to me. The motherboard will only use a certain amounts of volts based on its need, so it will be the rare exception when it hits all the way at 1.3625. You could try rubbing it down to less resistance and see if it starts using more juice.

ChIck3n

So, erase some of the graphite? I will give it a try.

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mothergoose729

More grind it down a little more.

ChIck3n

Ah, ok. That makes more sense. I will give it a try! I hope it will allow me to get a few more mhz

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G|F.E.A.D|Killa

leave it the way it is. you did the mod right when it adds more volts underload. you will not get it to evel close to whats in the bios.

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I heard Ford is coming out with heated bumpers in 2010 so your hands don not get cold while pushing it.

ChIck3n

Ok, at least I know I did it right I did not want to wake up and find I fried my CPU/mobo.

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Gunderman456

When I attempted to overclock my CPU to 3.2 GHz, and find stable voltages, one serious problem was the VDroop on my MOBO. In using HWMonitor and CPU-Z in conjunction with Prime95, my temps for the most part stayed in the 50s-low 60s C, but I noticed that a CPU VCore of 1.4v in Bios, translated to 1.35v in HWMonitor/CPU-Z at idle and the sad thing, when Prime95 started stressing the CPU, the CPU VCore dropped further to 1.33v. Apparently, that is normal, since the board wants to compensate for spikes, but it's killer when you're trying to get the CPU to remain stable at 3.2 GHz when one is losing between 0.05 volts idle and more so when the cores get stressed.

Over the course of the next few days, with the aid of temperature monitors and Prime95, I started to tweak the voltages available throughout the Bios. Prime 95 kept failing due to the CPU/MOBO's incapability to remain stable at CPU VCore 1.4v. No matter the setting in Bios, and I went over 1.456v, HWMonitor kept reading the actual volt at 1.383v and would for the most part not exceed this figure.

I wanted my actual CPU VCore voltage to closely match what I was setting in Bios. I knew this would be the key to getting a stable overclock and passing the Prime95 tests.

I reached for my 2HB pencil to perform the VDroop mod. While HWMonitor was engaged and while the computer was still running, I traced one line over the resistor [=]1 and linked the south and north ends of the resistor with a led trace (horizontal lines in figure 1). I looked at the HWMonitor volt readings, and the CPU VCore went up slightly. I proceeded to traces several more lines (5 more) and now the CPU VCore was idle at 1.398v (0.02v away from the ideal 1.4v set in Bios).

I was overjoyed! Now the voltage at Idle was 1.398v and at Load it was 1.4v exactly. The VDroop mod solved the voltage dip the CPU VCore would exhibit in HWMonitor which made serious overclocking impossible. Now, when I need power at Load, there is no loss but a slight increase as it should be. With this modification, I ran the computer for over 6 hours without failure in Prime95. I then proceeded to tweak the other Bios voltages across the other settings to further reduce heat and increase stability.

So since your close, apply one stroke at a time and test to get you as close as possible to the Bios volts (like I did), if you go over no prob, just rub some off with your finger. Play with it until you get the result you want. Make sure the led does not chip off the pencil and have traces fly all over the MOBO, it may fry something else.

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