Problematic DDR4-3000 speeds

[Arachnotronic]

Hi all,

I recently put together a Skylake system using an ASUS Maximus VIII Ranger board and G.Skill memory rated at DDR4-3000.

The issue that I'm having is that my system doesn't always POST/boot when I have the memory set to DDR4-3000 speed. I tried using the XMP profile, setting the memory timings manually to what the memory is supposed to be able to run at (and boosting voltage to 1.35), and even letting the motherboard use "automatic" settings (which results in looser timings).

When the system doesn't POST, I notice that the on-board LED gives error code "55" which according to the motherboard manual is "Memory not installed."

Backing down the memory to DDR4-2666 and using the "automatic" memory timings (which results in fairly loose timings relative to what the memory should be able to do) resolves my issues.

So my question is this: is there any possibility of "user error" here? And, if this *isn't* user error, then is this just a case of "bad" memory, or is it simply that the CPU memory controller isn't able to run the memory successfully at these speeds (since DDR4-3000 is way out of spec)?

Thanks.

 

[bradly1101]

I looked around at user reviews at retail sites, and you're not alone in having trouble hitting 3000 with this RAM.

 

[AlienTech]

Their binning process must be very lax.. As they do not make memory for different timing but bin them for certain speeds, you can use slower memory and it would still work most likely.. But the faster speeds only mean it was tested and certified.. But that certification could be that it worked at those speeds on their test equipment. You might be loading the bus somehow.. A power or data cord running close to the board traces is enough to disrupt signals. There was a major storm the other night and I saw a flash and 5 seconds later I heard the boom.. My tv went blank and I could not type anything.. So a lightning strike maybe 10 miles away, took out the signals to the monitor and keyboard.. It working at slower speeds generally means loading.. Loading usually happens because of interference.. Higher voltages most likely wont fix the issue. Which only makes the chips work faster.. But that dont fix the problem of timing on the motherboard.

 

[PhIlLy ChEeSe]

Their binning process must be very lax.. As they do not make memory for different timing but bin them for certain speeds, you can use slower memory and it would still work most likely.. But the faster speeds only mean it was tested and certified.. But that certification could be that it worked at those speeds on their test equipment. You might be loading the bus somehow.. A power or data cord running close to the board traces is enough to disrupt signals. There was a major storm the other night and I saw a flash and 5 seconds later I heard the boom.. My tv went blank and I could not type anything.. So a lightning strike maybe 10 miles away, took out the signals to the monitor and keyboard.. It working at slower speeds generally means loading.. Loading usually happens because of interference.. Higher voltages most likely wont fix the issue. Which only makes the chips work faster.. But that dont fix the problem of timing on the motherboard.

Solar flairs!
Why don't you share your experience with DDR4?

 

[AlienTech]

Dont have any with DDR4 only DDR2 with similar problems. So why don't you instead of annoying others. Maybe you think you are too smart and above others. Or maybe you are just an ass, you find a few of them on every forum and site.