Enabling XMP

V33Fury

V33Fury

V33Fury

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26 Jun 2013
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30
Hi all,

sorry if this has been asked before, but I noticed my memory hasn't been running at the correct speed - 1300mhz is current setting, but should be 2400mhz.

I've read that this is due to not having XMP enabled - does anyone have any info on this for a Gigabyte Z87X-OC? I've noticed the XMP setting before, but It opened up a load of other options I think, so I left it alone assuming it was for overclocking and that my memory was low to accommodate lower CAS timing or my CPU overclock. Is it just a matter of enabling it and leaving the settings, or do I need to start adjusting stuff to get the most out of my memory?
 
V33Fury said:
Hi all,

sorry if this has been asked before, but I noticed my memory hasn't been running at the correct speed - 1300mhz is current setting, but should be 2400mhz.

I've read that this is due to not having XMP enabled - does anyone have any info on this for a Gigabyte Z87X-OC? I've noticed the XMP setting before, but It opened up a load of other options I think, so I left it alone assuming it was for overclocking and that my memory was low to accommodate lower CAS timing or my CPU overclock. Is it just a matter of enabling it and leaving the settings, or do I need to start adjusting stuff to get the most out of my memory?
Click to expand...

I have a Gigabyte Z87X board but it's the UD4H. For me, it was as simple as just enabling XMP in the BIOS.
 
You have to be careful with XMP as it will likely crank up some other voltages within the CPU and it's not likely to be stable anyway. The maximum rated memory speed for the 4790K memory controller is 1600mhz, so 2400mhz would be a substantial overclock.

What are you using to read memory speed? 1300mhz isn't really a normal speed, 1333mhz is. Could it be running at 2600mhz?
 
Yes, sorry it was 1333Mhz. I enabled XMP and it has a smiple slider to change the memory multiplier, so I bumped it to 1600Mhz and all is well so far - according to SIS Sandra it went from around 16gb/s bandwith to 19gb/s, so a reasonable increase by the looks of it!
 
What speed is your RAM rated for? 2400Mhz?

Then load XMP profile and save+exit, dont run it at 1600Mhz as thats not what you paid for.

There is no "slider" for XMP, that is for the memory multiplier that should be set to 24X once XMP is loaded.
 
Yeah, rated to 2400Mhz. I'm running the 4670 at 4ghz now and just making sure it's all stable. I'll keep turning it up and see how it likes it.

I remember reading about the memory controllers only being useful up to a point, and that was around 1600. I'll see how much more bandwidth it offers at higher speeds and see if it makes much difference at the top end.
 
Haswell and devils canyon cpus have little trouble running 2400mhz ram.

Just set it and forget about it.
 
I've ran both 2666 and 2400 mhz ram both at c11 with my devil's canyon i7k using xmp. No problems atall. If this was a problem it would be all over the web and high speed memory kits wouldn't be sold everyday all over the world. So yeah wack on the xmp!
 
Hi, just been reading through.

I set the speed (1866) and voltage (1.65) myself on the RAM (G.Skill Sniper), should I have just left it to XMP?

XMP seemed to set it at 1866 and 1.50v, is there any benefit to increasing the voltage on RAM to the maximum?
 
Id use the xmp setting, if it can do 1866 on 1.5v there is no need for the extra volts, just extra heat etc that isnt needed
 
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