Help with Asus Rampage Formula + E8400 overclocking... - Overclock.net

Aznboy1993 · 2 Weeks Ago

Hi, I just got a new motherboard and chip. They are E8400 and Asus Rampage Formula. I had EVGA 750i FTW before and I got 4.25GHz with 1.4v core. I do not understand the new BIOS so could anyone help me overclock my chip to 4.3GHz +?

Thanks.

J-vibe · 2 Weeks Ago

What have you tried? You said you overclocked before so you not completely clueless. Have you looked at other threads where they working with a similar motherboard like yours?

Ghostleader · 2 Weeks Ago

Quote:

Originally Posted by Aznboy1993

Hi, I just got a new motherboard and chip. They are E8400 and Asus Rampage Formula. I had EVGA 750i FTW before and I got 4.25GHz with 1.4v core. I do not understand the new BIOS so could anyone help me overclock my chip to 4.3GHz +?

Thanks.

Well, first I´ll recommend you to read these two articles over at Anandtech, lots of useful information about the X48 and how it works.

ASUS ROG Rampage Formula: Why we were wrong about the Intel X48

Intel X38 Tango - Is High FSB Overclocking Worth It?

Here´s a bios setup suggestions for you.

Tested with BIOS 0407 and with E8600, 2x2 Corsair Dominator PC8500 and 4870X2.

Some voltage values may have to be alter to suite your needs.

If you want 4,25GHz you can step up the multi to 8,5 and add more CPU voltage.

If you run the 0803 or 0902 bios you have the CPU, NB Skew Clock option, set those as followed

CPU Skew Clock, Delay 100ps and NB Skew Clock, Normal

That should do it

Good luck

500 8 4000 1000 555 15 Strong tRD9

Aznboy1993 · 2 Weeks Ago

Thanks I will try those settings out right now. BTW what does Load Line Calibration actually do and why do you have it disabled?

Ghostleader · 2 Weeks Ago

Quote:

Originally Posted by Aznboy1993

Thanks I will try those settings out right now. BTW what does Load Line Calibration actually do and why do you have it disabled?

I most quote ericeod on this.

Quote:

Originally Posted by ericeod

Loadline calibration defeats the purpose of vdroop. Besides the vdroop, there is also the voltage offsets (commonly called vdrop) which is the difference between bios set vcore and actual windows vcore. All of these safety features are designed to protect the CPU from dangerous spikes in voltage (shown in the pics below). So enabling LLC with a 45nm chip can be considered dangerous because the 45nm cores are more sensitive to higher voltages.

Here is what is going on:

Anandtech: LLC

Here is the standard vdroop as intended:

Here is with LLC or pencil mod:

Quote from Anandtech article

Quote:

No Vdroop means the VRM circuit must work harder at maintaining a constant voltage

In this next case we eliminate Vdroop altogether and examine the chaos that ensues. As illustrated by our model, removing Vdroop does nothing to reduce the magnitude of the idle to full-load transient but does increase the settling time as the VRM must recover to a higher final regulation voltage. As in the case of no Voffset, it is possible to exceed the maximum allowable CPU voltage (VID). Clearly, removing Vdroop gains us nothing and only serves to create problems that are more serious.

So what happens when we remove both Voffset and Vdroop? The answer is simple - bad things. Although the difference between the maximum positive and negative peak overshoot are the same, severe violations to the CPU VID limit occur. If you're asking yourself what's the problem with this, consider the case of a CPU VID of 1.60000V - because the user feels this is the absolute maximum CPU voltage that they will allow. Just how high do you think CPU voltage will go after leaving a heavy load condition? We can't be sure without knowing more of the details, but we can certainly conclude that it will be well in excess of 1.6V. If you've ever run a benchmark only to have your system crash right as it finishes then you have experienced the consequences of this poor setup.

Finally, let's take one last real-world look at the consequences of removing Vdroop. ASUS' implementation of this feature, labeled as Load Line Calibration and included with their latest line of motherboards, is particularly worthy of our attention for a number of reasons. The first is that setting lower voltages with this option enabled actually results in a condition in which the CPU voltage under load is higher than the idle voltage. Imagine our confusion as we desperately struggle to understand why our system is Prime95 stable for days yet continues to crash under absolutely no load. What's more, in spite of the absence of droop and for reasons unknown, enabling this feature artificially raises our CPU's minimum stable core voltage at 4.0GHz from 1.28V to about 1.33V. As a result, our system uses more power under load than is otherwise necessary. Our efforts to reduce our processor's supply voltage backfired - instead of lowering the system's total power consumption we managed to affect a 20W increase.

Now when you have read that you understand why I recommend to run LLC disabled, issues when a CPU get damage from this is rare but more common is random BSOD at desktop or browsing, specially with the Ramapge Formula.

Aznboy1993 · 2 Weeks Ago

If I disable load line calibration doesn't it mean i have to also bump my core voltage up a few notches to ensure stability? I tried 1.4V with llc enable and it was stable and w/o it crashed because of a lack of voltage i am presuming.

		Overclock.net - Overclocking.net > Intel > Intel Motherboards
Help with Asus Rampage Formula + E8400 overclocking...

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)