Can't get ram to get to the advertised 3000mhz

Whiteskyhd · Jan 18, 2017

Hi,

I have a asus z170 pro gaming motherboard, have managed to get my i7 6700k overclocked but whenever i try to putt my ram in xmp mode to get the stated 3000mhz instead of 2166 the system doesn't boot up

Please can someone help, been trying for ages here, really just want to get 300mhz ram

13thmonkey · Jan 18, 2017

when you are trying to reach 3000, the ram, the mobo and the cpu's memory controller are all being OC'd. So whilst the ram might be capable, perhaps the other elements are not.

Whiteskyhd · Jan 18, 2017

13thmonkey :

I checked that the ram is compatible with both the cpu and the mobo, and I have seen many other people with the same setup reaching ram speeds of 3000.

Could it be something to do with the voltage control?

rchris · Jan 18, 2017

I think (just my opinion) there is an issue with Skylake CPUs and memory control... or maybe with the motherboards not supporting it well. With 5 ASUS mbs and 1 Gigabyte mb over the past year, I have only been able to get XMP to work with one motherboard. I've been on various forums and tried all kinds of things, but it just doesn't work like it's advertised. I had no trouble at all using XMP with the Z97 and older boards.

So, sorry...I'm no help, but I share your pain.

JackNaylorPE · Jan 18, 2017

Are you using the correct voltage for XMP ?

1. Boot up under the 2133 default JEDEC setting by setting BIOS to all defaults

2. Run CPUz and look at the SPD tab

3. Take a screenie and print it

4. Go into BIOS and select XMP

5. Make sure all settings match your screenshot

6. Make sure voltage is "as advertised"

7. Save settings and reboot.

8. If no luck, try boosting DRAM voltage a bit

http://www.legitreviews.com/what-is-the-safe-voltage-range-for-ddr4-memory-overclocking_150115

Legit Reviews contacted Intel about the safe voltage range on DDR4 memory and we received this response.

“1.5v is the absolute max we allow for XMP certifications. However, good DDR4 memory will run at 1.35v up to 3200. Technically, no “safe” (guaranteed) OC over-voltage but 1.35v or lower is best.” – Intel

1.2V or lower = Best for DDR4
1.35V = okay voltage for overclocking kits
1.5V =absolute max voltage allowed for Intel XMP 2.0 profiles and max suggested voltage

9. Once ya get it booting and stable at stock CPU speeds, ya can try for XMP setting.

10. If no luck ask for advice on RAM manufacturer's forum or call Tech Support

A. Expect a lot of these issues with Z270 as MoBo vendors are still tweaking their XMP adjustments, but Z170 **should** be fine

B. This used to be rather common in past years and it was not uncommon where enabling XMP via the MoBo setting failed but manually entering all the speeds and timings worked just fine.

C. Of course most of the time (above 2133 on DDR3 and 2800 on DDR4) I wind up needing more than the rated voltage. The RAM on my personal box (DDR3-2400) was rated at 1.65 volts and it ran at the voltage at stick CPU settings ... to maintain stability and 4.7 GHz, I needed 1.71.

XMP is overclocking "by definition". Just as with your CPU, you will need more DRAM voltage to maintain stability.

http://www.intel.com/content/www/us/en/gaming/extreme-memory-profile-xmp.html

13thmonkey · Jan 18, 2017

You misunderstood, the 6700k max memory speed is 2133 (assuming DDR4), therefore in order to reach 3000 the memory controller of the CPU has to be OC'd. You do this my simply telling the memory to run at a speed, 3000 in this case, BUT if the memory controller is not capable on your particular chip of going above 2400 (for example) then it will fail.
Similarly the mobo may only be capable of 2400 stock and reaching 3000 is an OC for it too, if it can only reach 2600 (for example) then 3000 will cause a fail.
So it will only OC to lowest of those three elements.

Whiteskyhd · Jan 18, 2017

So in theory, if the mobo supports 3000 and the memory on my particular cpu chip can reach 3000 it should run at 3000?

JackNaylorPE · Jan 18, 2017

Whiteskyhd :

Again, provided you give it enough voltage.

Not the jump from 1.2v to 1.35 at the XMP 3000 setting

Whiteskyhd · Jan 18, 2017

JackNaylorPE :

So your saying that 1.2 to 1.35 is to big of a jump?

munkybuffon1988 · May 6, 2017

-XMP
And next manually..:
-DRAM Freq... - 3000
-DRAM Voltage - 1.35V
-Cycle Time 1 CLK
-tCL - 15 CLK
-tRCD - 17 CLK
-tRP - 17 CLK
-tRAS - 35 CLK
-tRFC - 525 CLK
-tRRD - 6 CLK
-tRRD_L - 8 CLK
-tFAW - 33 CLK

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Can't get ram to get to the advertised 3000mhz

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