Benching time...



7700K
ROG Maximus IX APEX
G.Skill TridentZ RGB DDR4-4266MHz 2x8GB







Stock memory frequency - DDR4-4266MHz CL19-19-19-39-2T @ 1.40v



Board and RAM are strong overclockers, managed to push the memory to DDR4-4300MHz without touching the stock voltage of 1.40v

Lol, so you're the one who ordered the RAM from IdealTech?

OCbility is huge on this Samsung B-die memory kit. The most important thing is you need to play a lot with VCCSA and VCCIO voltages.

But first of all, have you managed to get the RAM run at its specified frequency as of XMP @ DDR4-4266 C19?

Pretty sure you can do that manually bro 
How much is your 7700K's load voltage @ 5.1?
What's your chip's VID bro? (Read through UEFI with everything default and power saving features disabled)

Here's what I found after few days playing with the 4266 kit

1) with XMP profile loaded at 4266 19-19-19-39 @ 1.40v, the RAM gives a lot of 55 code at reboot. This could be due to the PCB with the LED causing unncessary interferences or the mobo (BIOS) is not fine-tuned to achieve such a high mem frequency
2) the RAM runs fine with perfect reboot at 4133 19-19-19-39 @ 1.35v
3 G.Skill RGB software is still in beta stage, so it has compatibility/conflict issues with ASUS Aura software in which both software can't be used at the same time. In my case, I just use ASUS's software to control both mobo and RAM

Here's what I found after few days playing with the 4266 kit

1) with XMP profile loaded at 4266 19-19-19-39 @ 1.40v, the RAM gives a lot of 55 code at reboot. This could be due to the PCB with the LED causing unncessary interferences or the mobo (BIOS) is not fine-tuned to achieve such a high mem frequency
2) the RAM runs fine with perfect reboot at 4133 19-19-19-39 @ 1.35v
3 G.Skill RGB software is still in beta stage, so it has compatibility/conflict issues with ASUS Aura software in which both software can't be used at the same time. In my case, I just use ASUS's software to control both mobo and RAM

Well I don't buy this kit just to see it will be downclocked
Keep pushing 

Well I don't buy this kit just to see it will be downclocked
Keep pushing 

Hi,
If you run some synthetic benchmark, like Realbench, what is the temperature?
My Kaby Lake core i7-7700k, I can only OC'ed to 4.8GHz, Realbench temp reaching ~88'C max, if I clocked higher I'm really not comfortable with the temperature.
But come thinking of it, our daily tasks (surfing, gaming) we don't push the core going 100% utilization like what RealBench does, maybe I should go for 5GHz? (without running RealBench to stress test)...as long as it didn't blue screen when I game, I should call it stable and good enough. Is this a good way to judge a system as stable, meaning running my own apps and games, without doing RealBench?

Hi,
If you run some synthetic benchmark, like Realbench, what is the temperature?
My Kaby Lake core i7-7700k, I can only OC'ed to 4.8GHz, Realbench temp reaching ~88'C max, if I clocked higher I'm really not comfortable with the temperature.
But come thinking of it, our daily tasks (surfing, gaming) we don't push the core going 100% utilization like what RealBench does, maybe I should go for 5GHz? (without running RealBench to stress test)...as long as it didn't blue screen when I game, I should call it stable and good enough. Is this a good way to judge a system as stable, meaning running my own apps and games, without doing RealBench?

Regarding our 4266 RAM being unable to reboot at the rated frequency, yesterday I've actually contacted both G.Skill and ASUS HQ for advice.
Based on their reply, they are suspecting that weak CPU IMC might be the culprit.
Weak IMC means you will have to increase the VCCSA, VCCIO and/or VDIMM.

Looks like our journey is still long way to go, probably need another CPU to test out or even worse, a proper (extreme) cooling to "open" the IMC. 

It sounds like you've hit the CAS wall at such a high memory frequency.
4133C17 is so tight AF.
I think 4133C18 should be good enough since you said it's stable.

Suddenly 4266C19 because of multiple failed reboot code 55/49, my OS corrupted
I've got a few 7700K coming to sort out whether it's really due to weak IMC of my current chip. 

It sounds like you've hit the CAS wall at such a high memory frequency.
4133C17 is so tight AF.
I think 4133C18 should be good enough since you said it's stable.

Suddenly 4266C19 because of multiple failed reboot code 55/49, my OS corrupted
I've got a few 7700K coming to sort out whether it's really due to weak IMC of my current chip. 

I also wish they are sponsored units lol.
Yeah that 4333 is crazy, can do 4500 19-19-19 on air

BTW, they also showcased 4500 16-16-16 during Computex 2016

http://www.ocdrift.com/computex-2016-g-ski...-carousel-30909

Not just that, G.Skill is currently binning for 4400 kit, coming soon.



http://www.ocdrift.com/g-skill-announces-d...-4500mhz-speed/