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Core I9 7960x Overclock - 4.8Ghz Just cant it get stabel. any tips?

Nicklas0912
Level 7

‎12-25-2017 06:09 PM - last edited on ‎03-06-2024 10:03 PM by Community Admin

Hello.

Im overclockning my 7960x, currently max is 4750Mhz, Cinebench stabile.. But I cant get 4.8Ghz to pass no matter what, what is worng? did try up to 1.31 volts without any luck.

Info about the OC right now:

Asus Rampage VI Apex
1.265 volt for the CPU
Load line 6
1.86 input for the CPU.
Max Core temp: 73c
VRM temps: 57c

Any one know if is a temp issu with 4.8Ghz or?

Thanks!

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Menthol
Level 14

‎12-26-2017 05:05 AM

Nicklas0912,
I have only had my 7980 for a couple weeks so I don't know what to expect yet but passing RB15 at 4750 seems pretty damn good to me, anything above 4600mhz gets difficult for me
Temps and current seems to skyrocket very fast on these big chips I don't think software temp reading report 100% correctly during these fast bursts during benching
looking on HWBOT I see one person pass RB15 at 4860 on custom water but the database is very limited on these chips and CPU's capabilities differ by a huge margin
What is your Cache clocked to as that seems to increase needed current and voltage needed and temps
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Nicklas0912
Level 7
In response to Menthol

‎12-26-2017 06:44 PM

Menthol wrote:
Nicklas0912,
I have only had my 7980 for a couple weeks so I don't know what to expect yet but passing RB15 at 4750 seems pretty damn good to me, anything above 4600mhz gets difficult for me
Temps and current seems to skyrocket very fast on these big chips I don't think software temp reading report 100% correctly during these fast bursts during benching
looking on HWBOT I see one person pass RB15 at 4860 on custom water but the database is very limited on these chips and CPU's capabilities differ by a huge margin
What is your Cache clocked to as that seems to increase needed current and voltage needed and temps


3125Mhz on Cache, can run like 3250Mhz on Cache no problem.

oh well, just getting a Quad Rad 60mm instead of my currenty tripple 30mm.

So will have total 1x Tripple 60mm 1x Quad 60mm, 1x single 80MM all push pull.

But im getting 7980 XE in 20 days, so hope it can aleast 4.7Ghz 🙂

But mabye im temp limit ye, looks like since it crash.
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JustinThyme
Level 13

‎12-26-2017 08:13 PM

If you are hitting 4.7 stable you are in the top 10% or better for that chip. Cinebench isnt exactly stable.
Run RealBench and see what you get. If you can pass several runs of that then you are well on your way.



“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein
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Nicklas0912
Level 7
In response to JustinThyme

‎12-27-2017 08:01 AM

JustinThyme wrote:
If you are hitting 4.7 stable you are in the top 10% or better for that chip. Cinebench isnt exactly stable.
Run RealBench and see what you get. If you can pass several runs of that then you are well on your way.


I will try it later 🙂 it should could do it on 4750Mhz, can do Firestirke and timespy on 4800Mhz, just not Cinebench sadly.

Menthol wrote:
Expect a lower overclock on the 7980XE, I am using a water chiller on my setup to help keep temps under control
The best binned 7980XE from Silicon Lottery is 4.4 GHZ and delidded to reduce temps, they sell them for $2700.00


Hmmm, I see many like Jayce 2 cent that can do 4.6/4.7Ghz on a single or Duo rad? mabye he was just lucky 😄 We see when it comes.
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JustinThyme
Level 13
In response to Nicklas0912

‎12-27-2017 08:14 AM

Nicklas0912 wrote:



Hmmm, I see many like Jayce 2 cent that can do 4.6/4.7Ghz on a single or Duo rad? mabye he was just lucky 😄 We see when it comes.


20 rads wont make a difference if you cant get the heat off the core. Are you monitoring your liquid temp? A single 480 rad is more than capable of disipating the heat from the liquid but you must first get the heat off the IHS and into the liquid. Thats where most of the problem lies with these chips. Im running a 7900X and with dual 480 rads and 20 fans total, can easily keep my liquid temps near ambient and that helps but is not the limiting factor. My machine runs nearly silent with minimal loads but the temps on the core jump instantly when a load is applied and the only thing that changes is my liquid temp will start to rise slowly and the fans ramp up to keep it under 30C.



“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein
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Nicklas0912
Level 7
In response to JustinThyme

‎12-27-2017 12:09 PM

JustinThyme wrote:
20 rads wont make a difference if you cant get the heat off the core. Are you monitoring your liquid temp? A single 480 rad is more than capable of disipating the heat from the liquid but you must first get the heat off the IHS and into the liquid. Thats where most of the problem lies with these chips. Im running a 7900X and with dual 480 rads and 20 fans total, can easily keep my liquid temps near ambient and that helps but is not the limiting factor. My machine runs nearly silent with minimal loads but the temps on the core jump instantly when a load is applied and the only thing that changes is my liquid temp will start to rise slowly and the fans ramp up to keep it under 30C.


Im change my tripple to a quad, because Im running a Titan X Pascal in the loop too.
Can do 4.8Ghz in firestirke and timespy, but need a little better temps for Cinebench.

My higheste score so far, 4.8Ghz. Number 20 Hall of Frame Single card .

All above me, useing Titan V or 7980XE / LN2.
https://www.3dmark.com/hall-of-fame-2/fire+strike+3dmark+score+performance+preset/version+1.1/1+gpu

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Menthol
Level 14

‎12-27-2017 04:15 AM

Expect a lower overclock on the 7980XE, I am using a water chiller on my setup to help keep temps under control
The best binned 7980XE from Silicon Lottery is 4.4 GHZ and delidded to reduce temps, they sell them for $2700.00
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cekeu
Level 12

‎12-27-2017 12:52 PM

Exemple from Silicon Lottery, There is no 7960x:

As of 12/01/17, the top 31% of tested 7980XEs were able to hit 4.4GHz or greater.
As of 12/01/17, the top 65% of tested 7980XEs were able to hit 4.3GHz or greater.
As of 12/01/17, the top 94% of tested 7980XEs were able to hit 4.2GHz or greater.
As of 12/01/17, the top 100% of tested 7980XEs were able to hit 4.1GHz or greater.

As of 12/01/17, the top 18% of tested 7940Xs were able to hit 4.6GHz or greater.
As of 12/01/17, the top 32% of tested 7940Xs were able to hit 4.5GHz or greater.
As of 12/01/17, the top 72% of tested 7940Xs were able to hit 4.4GHz or greater.
As of 12/01/17, 100% of tested 7940Xs were able to hit 4.3GHz or greater.

As of 12/01/17, the top 39% of tested 7920Xs were able to hit 4.6GHz or greater.
As of 12/01/17, the top 85% of tested 7920Xs were able to hit 4.5GHz or greater.
As of 12/01/17, 100% of tested 7920Xs were able to hit 4.4GHz or greater.

As of 12/01/17, the top 16% of tested 7900Xs were able to hit 4.8GHz or greater.
As of 12/01/17, the top 57% of tested 7900Xs were able to hit 4.7GHz or greater.
As of 12/01/17, the top 84% of tested 7900Xs were able to hit 4.6GHz or greater.
As of 12/01/17, 100% of tested 7900Xs were able to hit 4.5GHz or greater.

As of 12/01/17, the top 7% of tested 7820Xs were able to hit 4.9GHz or greater.
As of 12/01/17, the top 37% of tested 7820Xs were able to hit 4.8GHz or greater.
As of 12/01/17, the top 68% of tested 7820Xs were able to hit 4.7GHz or greater.
As of 12/01/17, the top 91% of tested 7820Xs were able to hit 4.6GHz or greater.

According to Silicon Lottery:

Intel Skylake-X Qualified Vendor list
These are the components that Silicon Lottery has verified to work with the overclocks we test at.

CPU:
Intel 7800X
Intel 7820X
Intel 7900X
Intel 7920X
Intel 7940X
Intel 7960X
Intel 7980XE

CPU Cooler:
Any AIO watercooler 360mm or greater (240mm for 7800X/7820X).

Thermal Compound:
ARCTIC MX4
Gelid Solutions GC-Extreme
Noctua NT-H1
Thermal Grizzly Kryonaut

Motherboard:
ASRock X299 OC Formula
ASRock X299 Taichi XE
ASUS X299 Rampage VI Apex
ASUS X299 Rampage VI Extreme

Memory:
Quad Channel DDR4-2133 1.2V
Quad Channel DDR4-2400 1.2V
Quad Channel DDR4-2666 1.2V
Quad Channel DDR4-2800 1.2V

Ambient temperature:
25°C or less.
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meankeys
Level 13

‎12-27-2017 01:50 PM

Guy's some good stuff

With my 7920X the cache seems to be my bottleneck. If I set to AUTO I can pass a bench pushin it (Grant it I haven't messed with the voltage) Just for ****s and giggles try setting your cache to auto to get to the next notch. FYI SS cooling not delidded

R15- 3208@4900Mhz

http://hwbot.org/submission/3722231_meankeys_cinebench___r15_core_i9_7920x_3208_cb
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