[HELP]Z270 Gaming M7 + G.Skill DDR4 4133Mhz couldn't post designed 4133Mhz

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wujin1994sz

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Hey guys
I have a Z270 Gaming M7, 7700K paired with G.Skill Trident Z RGB DDR4 4133 16G (2*8G) for 32G (2 kits together)
Timing is 19-19-39-39, voltage 1.35V
Newegg link:
https://www.newegg.com/Product/Product.aspx?Item=N82E16820232496

The motherboard has been flashed to the latest 1.2 BIOS.
I couldn't have the RAM post above 3733Mhz no matter what settings I changed, I change the voltage to 1.4V, 1.45V even 1.5V couldn't post. I set the XMP and manually change the timing to the default timing, couldn't post. G.Skill has a 32G 4133Mhz kits with different timing 19-21-21-41, I change mine to that couldn't post. I set my CPU back to default frequency, couldn't post. 
Very frustrated, I asked G.Skill and they told me that I need to increase my VCCIO and VCCSA. My VCCIO is 1.352V, VCCSA is 1.368V when I overclock my CPU to 4.8Ghz which these 2 voltages are already very high. They also said that 4133Mhz is a extremely high frequency thus does not guarantee everyone could achieve that speed, however I couldn't even achieve 3866Mhz which is kinda absurd.

Anyone could suggest? If I still can't figure out, I am going to return the 4133 kits and go with 3866 kits since I am paying a huge premium for 4133($500 for 4133, only $375 for 3866).
Thank you so much! 
 

Nichrome

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Hi

Try 19-23-23-45 2T at 1.45V.
Obviously, at own risk.

Also note, your CPU is designed to work up to 2400MHz, and above is not guaranteed.
And using all 4 RAM slots puts much stress on IMC, so you probably could boot with 2 sticks, but all 4 make it harder.
 

wujin1994sz

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Nichrome date=1487705927 said:
Hi

Try 19-23-23-45 2T at 1.45V.
Obviously, at own risk.

Also note, your CPU is designed to work up to 2400MHz, and above is not guaranteed.
And using all 4 RAM slots puts much stress on IMC, so you probably could boot with 2 sticks, but all 4 make it harder.
What does this 2T mean, thanks :)
 

Nichrome

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1T is one clock cycle. 2T is two clock cycles. Can't even check BIOS myself at the moment.
Ignore the 2T for a second and try the timings I posted.
 

wujin1994sz

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Nichrome date=1487708443 said:
1T is one clock cycle. 2T is two clock cycles. Can't even check BIOS myself at the moment.
Ignore the 2T for a second and try the timings I posted.
Unfortunately, I couldn't post 3866Mhz with this setting.
 

Nichrome

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Well, it is overclocking at the end. Above 2400MHz isn't guaranteed (see CPU specs for RAM, as well as *OC being mentioned in motherboard specs)
And I am honestly surprised you got 3866MHz with 4 RAM slots occupied!
Try with 2 sticks only, see if that will boot. But in my opinion, it is already maxed out as for using all 4 sticks. 

And personally, I never pay premium for "faster" RAM. In fact, I bought a cheapest 2x8GB DDR4 kit I could find (that matched my visual liking) and was rated at 2400MHz. I had it overclocked at 2666MHz without tweaking, and 3000MHz with some tweaking. So honestly, paying extra for few MHz more isn't worth it.
Back in DDR3, I had 4x4GB DDR3 Corsair Vengeance rated at 1600MHz. Those overclocked easily to 2133MHz without tweaking (all at Auto), and made it to 2400MHz with little adjustments. But that's only ~1000MHz over designed CPU specs. You are trying to get almost 2000MHz over what is CPU designed for.

Over 3866MHz is quite high overclock, and getting above 4000MHz is rather hard.
At own risk. Hope you read.
Try this: 20-25-25-55-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V
Alternatively: 21-31-31-63-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V


Otherwise, you may need to speak to GSkill and/or MSI about getting RAM at those rated speeds. >>How to contact MSI.<<

Professional overclockers use single RAM stick to get high speeds..
 

wujin1994sz

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Nichrome date=1487718568 said:
Well, it is overclocking at the end. Above 2400MHz isn't guaranteed (see CPU specs for RAM, as well as *OC being mentioned in motherboard specs)
And I am honestly surprised you got 3866MHz with 4 RAM slots occupied!
Try with 2 sticks only, see if that will boot. But in my opinion, it is already maxed out as for using all 4 sticks.

And personally, I never pay premium for "faster" RAM. In fact, I bought a cheapest 2x8GB DDR4 kit I could find (that matched my visual liking) and was rated at 2400MHz. I had it overclocked at 2666MHz without tweaking, and 3000MHz with some tweaking. So honestly, paying extra for few MHz more isn't worth it.
Back in DDR3, I had 4x4GB DDR3 Corsair Vengeance rated at 1600MHz. Those overclocked easily to 2133MHz without tweaking (all at Auto), and made it to 2400MHz with little adjustments. But that's only ~1000MHz over designed CPU specs. You are trying to get almost 2000MHz over what is CPU designed for.

Over 3866MHz is quite high overclock, and getting above 4000MHz is rather hard.
At own risk. Hope you read.
Try this: 20-25-25-55-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V
Alternatively: 21-31-31-63-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V


Otherwise, you may need to speak to GSkill and/or MSI about getting RAM at those rated speeds. >>How to contact MSI.<<

Professional overclockers use single RAM stick to get high speeds..
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I am back with some test results.
The system did post with 4000Mhz 20-25-25-55 2T 1.45V with the fastest IO speed
Couldn't post with 4133Mhz with this setting, I haven't tried out the CL21 setting (Pretty meaningless I guess)
Then I decrease the CL and voltage, the best result is 3733Mhz 17-18-18-38 2T 1.35V, couldn't post 3733Mhz with CL16, couldn't post 3866Mhz.
With 3733Mhz 17-18-18-38 2T 1.35V, I had a relatively close result with 4000Mhz 20-25-25-55 2T 1.45V.
The first benchmark I ran is usually the highest score I got after I restart the computer, starting from the second benchmark the score started to decrease.
For 3866Mhz, I couldn't post with CL17, CL18 even CL19, starting from the CL20 you provided, It started to post. 
I feel like my system hit a wall when reaching 3866Mhz, I recall that HardwareCanucks' review said the same thing about this motherboard.
Paying such a huge premium is absolutely a waste for me since I need the 32G setup, otherwise I would go with the M9 Apex at the first place (A guarantee 4266Mhz post from G.Skill I remember). 
Thank you again, I will do some research on the next purchase and return my current 2*16G kits.
 

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wujin1994sz

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Nichrome date=1487718568 said:
Well, it is overclocking at the end. Above 2400MHz isn't guaranteed (see CPU specs for RAM, as well as *OC being mentioned in motherboard specs)
And I am honestly surprised you got 3866MHz with 4 RAM slots occupied!
Try with 2 sticks only, see if that will boot. But in my opinion, it is already maxed out as for using all 4 sticks.

And personally, I never pay premium for "faster" RAM. In fact, I bought a cheapest 2x8GB DDR4 kit I could find (that matched my visual liking) and was rated at 2400MHz. I had it overclocked at 2666MHz without tweaking, and 3000MHz with some tweaking. So honestly, paying extra for few MHz more isn't worth it.
Back in DDR3, I had 4x4GB DDR3 Corsair Vengeance rated at 1600MHz. Those overclocked easily to 2133MHz without tweaking (all at Auto), and made it to 2400MHz with little adjustments. But that's only ~1000MHz over designed CPU specs. You are trying to get almost 2000MHz over what is CPU designed for.

Over 3866MHz is quite high overclock, and getting above 4000MHz is rather hard.
At own risk. Hope you read.
Try this: 20-25-25-55-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V
Alternatively: 21-31-31-63-2 (tCAS-tRC-tRP-tRAS-tCR) at 1.45V


Otherwise, you may need to speak to GSkill and/or MSI about getting RAM at those rated speeds. >>How to contact MSI.<<

Professional overclockers use single RAM stick to get high speeds..
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I take back what I said!
My motherboard is TOXIC!
It won't let me post 3866Mhz using 19-19-19-41, BUT I have no problem reaching 4000Mhz using 18-18-18-38. What the heck?!:mad:
Tried 18-25-25-45, 19-25-25-45 on 4133Mhz, all failed. 
This motherboard is TOXIC when CAS is 19.
I may need to reconsider about returning the RAM, lol
 

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Nichrome

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You seem to not understand that IMC in CPU is your limit. Not motherboard..
https://ark.intel.com/products/97129/Intel-Core-i7-7700K-Processor-8M-Cache-up-to-4_50-GHz

Max Memory Size (dependent on memory type)
64 GB
Intel? Optane? Memory Supported ?
Yes
Memory Types
DDR4-2133/2400
, DDR3L-1333/1600 @ 1.35V
Max # of Memory Channels
2
ECC Memory Supported ?
No
 

jjxakergm

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The motherboard Z270 Gaming M7 does not know how to work with memory at a frequency of 4133Mhz, and can not work with CR1 timings! If the frequency is higher than 3200Mhz.
Technical support after receiving all the evidence just started to evade.

Replacing the board with another brand solves all problems.
I understand that these are bios problems, but they have not been corrected all these months since the announcement.
In fact, the board is able to work correctly only with memory at a frequency of 3866Mhz. If the frequency is higher then there will be problems.
The memory controller potential at Kaby Lake is enormous! even 4500Mhz is not a problem, but unfortunately not with MSI.
 

kyberal

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Hi! I believe I'm about to hijack this thread :)
I know it's been a few years since the last post but I got a very similar problem with the same motherboard and a similar RAM kit as OP.
I have sent a ticket to MSI to see if they can help me.

I have purchased the MSI motherboard Z270 GAMING M7.
I have also purchased a i7-7700k for it.
And finally purchased the G.SKILL F4-4133C19D-16GTZA 2x8GB RAM kit which appears as 4133Mhz supported speed at the motherboard compatibility list by "KABYLAKE" (https://www.msi.com/Motherboard/support/Z270-GAMING-M7#support-mem-5)

I cannot make the RAM work at 4000Mhz or 4133Mhz, it works only up to 3866Mhz (OP can't make it work at this speed but I can).
I have done a lot of MemoryTest86 runs and the memory modules are fine, I also tested them on a friends motherboard (ASUS) that supports 4133Mhz and it runs fine on that board at the maximum speed.

I tried all the Game Boost settings, I tried with and without XMP, and it only works up to 3866Mhz.

I'm able to boot at 4000Mhz with XMP enabled but I need to do some extreme voltage overclocking.
I need to set CPU SA Voltage and CPU IO Voltage at 1.400v and DRAM voltage at 1.430v.
The system will eventually boot up but it will get a BSOD very soon after stress testing (Prime95).

There is no chance of booting at 4133Mhz, even when the RAM appears in the compatibility list.
 
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