Intel Core Ultra 9 285k 'Arrow Lake' Discussion/News ("15th gen") on LGA-1851

[Shaolin Chicken]

I don't see why it shouldn't run, as you have a 1 DPC board (2 DIMM), which should be good for 9K+. What I find interesting, though, is that your 8K kit doesn't have a CKD driver, and the 8200 kit does, which makes me question if it was a UEFI update.

I guess I quick way to tell is to bump the speed to 8200 on the Corsair set and increase the VDD/VDDQ a little and see if it boots.

Sure, I usually scan over the following threads on OCN.

Overclocking "Arrow Lake" - 285K, 265k, 245k etc results, bins and discussion - https://www.overclock.net/threads/o...11860/page-445?post_id=29453741#post-29453741
*Official* Intel DDR5 OC and 24/7 daily Memory Stability Thread - https://www.overclock.net/threads/o...4772/page-1640?post_id=29453334#post-29453334
ASRock Z890 TAICHI OC FORMULA Thread - https://www.overclock.net/threads/a...12427/page-123?post_id=29452506#post-29452506
[OFFICIAL] Asus Strix/Maximus Z890 Owners Thread - https://www.overclock.net/threads/official-asus-strix-maximus-z890-owners-thread.1812501/page-52

There are a few other sites, but OCN is fairly active.

Thanks for the links, I've bookmarked those.
My GSKILL cudimms do run at 8200, just with a high CAS of 66, doesn't seem to want to post any lower.

 

[RSR]

My GSKILL cudimms do run at 8200, just with a high CAS of 66, doesn't seem to want to post any lower.

That seems very odd to me, but without having it in front of me, it's very hard to tell what's going on.

 

[Tetras]

That good news is that the system is working, but it is not great on the G.Skill front.

I wonder if it has to do with the CKD driver, as I have seen a few updates around that recently with UEFI updates etc..

Is it possible to configure bypass mode manually, or does it only happen auto?

 

[RSR]

Is it possible to configure bypass mode manually, or does it only happen auto?

Yes, I believe you can put them in bypass mode.

I'll have a hunt for the setting, as I know there have been some UEFI updates around that.

 

[hlennie]

Is it possible to configure bypass mode manually, or does it only happen auto?

This setting will be in the DDR timings section

 

[hlennie]

Could be maybe my 265K is not cut out for 8200 speeds?

265k will run @ 8200 no problem
I have the same memory kit Fyi the kit will do 8200 @ 36.49.49.49.100 2N or 8800 @ 40.52.52.52.131 2N

Up memory voltages to 1.45 and make sure its in gear2 hope this helps

Cpu wise P56-54 E50 Ring 40 NGU 35 D2D 37 auto voltages

 

[Shaolin Chicken]

265k will run @ 8200 no problem
I have the same memory kit Fyi the kit will do 8200 @ 36.49.49.49.100 2N or 8800 @ 40.52.52.52.131 2N

Up memory voltages to 1.45 and make sure its in gear2 hope this helps

Cpu wise P56-54 E50 Ring 40 NGU 35 D2D 37 auto voltages

Thank you very much for confirming.
I will try the settings you mentioned.

Just not sure which is the memory voltage on my motherboard,
is it the VDDQ?
I have the AsrockZ890i Nova WIFI.

 

[RSR]

It will be VDD and VDDQ, which will need to be 1.45. I will probably need high voltage mode enabled, as you are limited to 1.435 without that.

 

[Shaolin Chicken]

It will be VDD and VDDQ, which will need to be 1.45. I will probably need high voltage mode enabled, as you are limited to 1.435 without that.

Hi RSR, managed to get it to boot at 8200, what I did was input 8200 speeds then changed timing setting to MRC I think, will check later, all the timings are correct as on the specs.

Just running OCTT memory test now, hopefully it's stable

 

[RSR]

Nice one. MRC stands for Memory Reference Code; it is how the board trains the memory. I noticed that with the OCF, things are named differently between the Asus and Asrock boards.

Gaming is probably the better test, but OCCT is also pretty good. If you haven't already, I'd make sure DDR5 has good airflow over them.

 

[Shaolin Chicken]

Nice one. MRC stands for Memory Reference Code; it is how the board trains the memory. I noticed that with the OCF, things are named differently between the Asus and Asrock boards.

Gaming is probably the better test, but OCCT is also pretty good. If you haven't already, I'd make sure DDR5 has good airflow over them.

My case doesn't allow for a front fan, all I have is a 360 AIO exhaust and 2 120mm intake fans at the bottom, not sure if the voltage has increased as I left that on auto, will check later, hopefully it's still at the default 1.4 for the G-skill RAMS,
I also have Hwinfo running so can see the temperatures of the RAM while stressing it.

 

[Vimes]

Interesting how it seems to be accepted that the ArL CPU's and boards should manage 8200Mhz, almost as a norm..? Well, at least more so than RL.

 

[Shaolin Chicken]

Hi RSR, managed to get it to boot at 8200, what I did was input 8200 speeds then changed timing setting to MRC I think, will check later, all the timings are correct as on the specs.

Just running OCTT memory test now, hopefully it's stable

Not stable, crashed the PC after 22 minutes, changed the command rate from 1T to 2T and trying again.

 

[Shaolin Chicken]

Nice one. MRC stands for Memory Reference Code; it is how the board trains the memory. I noticed that with the OCF, things are named differently between the Asus and Asrock boards.

Gaming is probably the better test, but OCCT is also pretty good. If you haven't already, I'd make sure DDR5 has good airflow over them.

OCCT showing 69.3C for the memory and hwinfo showing 70C anything to be concerned about?

 

[RSR]

OCCT showing 69.3C for the memory and hwinfo showing 70C anything to be concerned about?

That sounds normal with G.Skill on stress test, daily usage will be much lower.

It is why it's good to have active airflow over them if possible even if just for stress testing

 

[Shaolin Chicken]

So it passed the OCCT ram test
Just running OCCT CPU stress test, getting temperatures between 76C to 80C is this OK?
Highest it got to was 82C, default settings.

 

[RSR]

So it passed the OCCT ram test
Just running OCCT CPU stress test, getting temperatures between 76C to 80C is this OK?
Highest it got to was 82C, default settings.

It's a little toasty, but you'll never see that in real-world use unless you like the run mem tests all day

 

[RSR]

Z890 OCF Build

 

[Shaolin Chicken]

Finished my stress testing and benchmarking of the system today.
Cinebench 2024 temperatures were 70C while running multi core.

Cinebench 2024 scores were down a little on multi core and GPU, but not by much.

This is with a totally stock system, so there is some room for improvement.

 

[Vimes]

Z890 OCF Build

Upside down and flipped, oh wow that really messed with me figuring it out....!