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Intel i7-3930k / Intel DX79SR / Kingston 16 GB (4x4) 2400 MHz

post #1 of 8
Thread Starter 
Hello, I want to know if anyone here has this same build and has succesfully achieved running the memory at 2400 MHz....

When I use the XMP profile for 2400 MHz (I have the latest bios for the mobo) my computer won't boot into windows (1 out of 4 or 5 times it does work though)... Anyone know what I should do or change on the bios to run it succesfully? Any specific settings I should change manually under the voltages?

Or if it is a known issue that it won't run, can you tell me if this kit will work ok?

http://www.newegg.com/Product/Product.aspx?Item=N82E16820104169

Right now I'm running my memory at the default 1333 MHz, not even 1600 MHz works... If I buy the memory above will it work at 1600 MHz at least?

Or can you guys recommend some memory for my specific build the i7-3930k and the DX79SR?

Thanks
Edited by charbelnicolas - 12/7/12 at 11:57am

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post #2 of 8
DDR-2400 isn't guaranteed to work on much of anything, and only on Ivy can you reliably expect such memory speeds without risking the longevity of your system.

However, you should still be able to get way past 1600.

I'd recommend manually setting all timings and voltages. XMP is iffy at best, and when it works it often applies unnecessarily high voltages. You can, however, use the XMP profile as a baseline.
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post #3 of 8
Thread Starter 
Thanks for your reply Blameless... I have managed to run the memory at 1600 MHz without any problems now, I just changed the latency manually (from the default bios profile) and it works like a charm.

And as far as the 2400 MHz, i think I'll just stay with 1600 MHz since that's what the processor officially supports, so I'm not going to force it.
post #4 of 8
Quote:
Originally Posted by charbelnicolas View Post

Thanks for your reply Blameless... I have managed to run the memory at 1600 MHz without any problems now, I just changed the latency manually (from the default bios profile) and it works like a charm.
And as far as the 2400 MHz, i think I'll just stay with 1600 MHz since that's what the processor officially supports, so I'm not going to force it.

Don't bother worrying about what your CPU supports. Those specs are always wayyyyyy under rated.
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post #5 of 8
In your case, there could be three possible reasons why your DDR3-2400 rated memory cannot do rated frequency:
- CPU's memory controller is not good enough (very few s2011 will actually be stable at DDR3-2400 in quad channel config);
- Intel board is not good for memory overclocking (as Intel don't care much about overcocking on their boards);
- Kingston DDR3-2400 CL11 kits are known for frequently missing specs, even on capable systems.

Still, you could running your config at DDR3-2133 by setting timings and voltages manually. For example, you can try setting 10-11-11-30-2T as primary timings, 1.65 as memory voltage, 1.10 for IO and SA (system agent) and go lower on timings and/or voltage if you want to.
(Kingston might also have DDR3-2133 XMP profile, but I'm not sure).
post #6 of 8
Thread Starter 
Thanks for your replies everyone.

I'd say the memory wouldn't run at 2400 MHz because of bad XMP profiles (since the 1600 default profile didn't work either until I set it manually), I havent actually tried setting the 2400 MHz all with manual settings but since I don't know much about overclocking and ram timings I just stay out of it.
post #7 of 8
I know this is late to the game, but I had the exact same problem.

Here was my solution:
http://www.overclock.net/t/1285943/how-do-i-get-2400mhz-memory-with-an-intel-dx79sr#post_20328949
post #8 of 8
hi, can anybody tell me how to overclock memory in dx79sr mb, now i am running at 1333mhz my memory, and it supports 2400mhz

please help
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