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4820K OC help

M11C
Level 10
Hello, first thread here (didn't have much luck on overclock.net)

so i need some help overclocking my i7 4820K.
it's an Ivy-E CPU with a 2011 socket, meaning it only works with the X79 chipset. it runs at 3.7GHz stock, 3.9 Boost.

Specs:
Mobo: R4BE
RAM: 4x 8GB G.Skill RipjawZ 2400MHz CL10
PSU: AX1200i
Cooling: EKFB R4BE monoblock

it runs completely stable at 4.5GHz at 1.2Vcore and LLC at high, as far as i can tell.

4.8GHz won't boot at 1.3Vcore, but i can get into windows at 1.35Vcore with CLL at Ultra, but Intel Burn Test fails after 2-3 passes.

i think i need to change some other voltages like VCCSA, VTT, PLL etc. but i have little idea what these voltages will do.

also, i'm not sure what RAM settings i need; i've just been running them at ~1000MHz when OC'ing.

is it safe to change CPU strap/ will it help get a stable OC?

will it help using quad channel memory, over dual channel?

is it recommended to use XMP?

i'm hoping to be able to do some benchmarks at 5.0GHz, but getting 4.8 stable is fine for now.

Btw. at 4.5GHz temp is at ~50C during stress testing.

- Thanks

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7
16,414 Views
37 REPLIES 37

M11C
Level 10
yeah, i got the monoblock, keeping my mosfet/VRM at 30C.

CPU + GPU block cooled by a 60mm 480 rad.

I know, but 4.1GHz at 1.088, 4.5GHz at 1.2 and 4.8GHz at 1.35 seems like a decent curve so far, and 5GHz at ~1.49 would fit nicely .

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

Nate152
Moderator
Go for it and post me your results please, you got me curious now haha. With your temps where they are I think you can do it.

Nate152 wrote:
Go for it and post me your results please, you got me curious now haha. With your temps where they are I think you can do it.


I did it 😛

50957
http://valid.canardpc.com/idb1pz

also added another 480 rad just for LoLz xD

and gonna play with my new SM951 when i get a new OS ISO. 😎
need one capable of UEFI install.

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

M11C
Level 10
HaHa, alright i'll giv it a shot and see if i can get a CPU-Z screenie.

Edit;
Nope, Haha.

i couldn't even get it to post, even though i pretty much maxed everything and downclocked the RAM.

i don't know if it would help to enable Extreme OV, or if it would just fry the chip.

damn, but i'm not gonne mess with it untill i can afford a new chip if the whole thing goes south.

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

Nope, Haha.

i couldn't even get it to post, even though i pretty much maxed everything and downclocked the RAM xD

i don't know if it would help to enable Extreme OV, or if it would just fry the chip.

damn, but i'm not gonne mess with it untill i can afford a new chip if the whole thing goes south 😛

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

Nate152
Moderator
Were you able to get 4.9GHz? You may have hit the wall I was talking about.

Extreme overvolt will allow you to go higher with the cpu voltage, I don't know if I would do it though you can still fry your cpu with too much voltage even though temps are ok. I've done that before so I would not recommend enabling extreme overvolt.

M11C
Level 10
Yeah, i think i Will get 4.8 stable, and see if hit a Wall at 4.9.

I could run intel burn test without error, but LLC pushed Vcore up to 1.408.

But oddly when I lowered LLC I got a BSOD in windows, which I didn't get before, so I think I need to try again with more voltages on auto 😕

I think I need 1.37 VCore for 4.8.

Yeah, I figured Extreme OV is for LN2

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

Nate152
Moderator
If you lowered the LLC and crashed you need more vcore. Remember if you set LLC higher than medium it will overshoot your vcore this is why you were stable with higher LLC.

Set LLC to medium and give it a little more vcore.

M11C
Level 10
Yes, I know, but I didn't get a chrash before, with the same setting, just a error in IBT.
I think I might have messed too much with other voltages.

I'll see if I can find what my Vcore was last time I was running 4.8GHz.

I'll give 4.9 a shot tomorrow and let you know.

Watercooling FTW :cool:

"essentially one of the most hardcore overclocking motherboards ever made."
http://www.hardocp.com/article/2014/03/24/asus_rampage_iv_black_edition_motherboard_review/7

Nate152
Moderator
An error means you are not completely stable.

I saw you had Realbench installed, you should use that for stress testing, your temps will be better with that too.