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What does this mean? "One DIMM per channel only" - Page 2

post #11 of 41
one DIMM just means one stick doesnt it?

Yeah cos it stands for dual in-line memory module, so one memory module (stick of memory) per channel.
post #12 of 41
well you need to have 2 DIMMS for dual channel and so on...
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post #13 of 41
Quote:
Originally Posted by $ilent;15340653 
one DIMM just means one stick doesnt it?

Yeah cos it stands for dual in-line memory module, so one memory module (stick of memory) per channel.

Yes, one stick is one DIMM. That warning is from his motherboard manual, for the x58 chipset LGA1366 board, the Intel CPU IMC has limitation to run 1 DIMM per channel with XMP Profile such as at 2000 MHz. It won't be a problem for 980x/990x, but for weaker IMC 920/930/950, it will take tons of QPI/vtt voltage to be considered safe for 24/7, it it even possible.

To run XMP profile with 1 DIMM per channel is common but 2 DIMMs per channel will need the Extreme Edition CPUs with stronger IMC smile.gif
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post #14 of 41
Thread Starter 
Do you use the windows or dos version of memtest?

I bought new RAM today, the 24GB, I'll test with it later and see what happens. Haven't experienced any bluescreen or anything like that though. But I've experienced that audio laggs and stuff like that.
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post #15 of 41
Memtest86+ bootable from pen drive http://www.memtest86.com/download.html

Good Luck OP.
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post #16 of 41
Thread Starter 
Looks like this now:

308806_10150499284322501_648472500_11355278_2131715842_n.jpg

I've got everything on "Auto" in BIOS, the "funny" thing is that the DRAM Voltage is 1.65 but the RAM spec says it's just tested for 1.5v, so I guess that might be what makes it stable?

Anyways, 1 pass = 8 hours, letting it run during my workday today as well.. smile.gif
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post #17 of 41
One DIMM per channel means one DIMM per channel.

You have three channels, if you install more than three sticks, the XMP settings are not guaranteed to be stable, and they probably won't be.

You will almost certainly need to manually adjust timings and voltages to get six sticks fully stable.

Do not use XMP, even in a supported configuration. The automatic timings are stupid, and the QPI/VTT voltages are often dangerous.

Memtest86+ is not a good memory stress test. It will test basic functionality, but won't but any where near maximum, or even a real world load on the memory sub system.

If you were getting errors in HCI Memtest for Windows, you are having problems. Stress testing is not about cycling tests until you find one that passes, its about finding the test that fails, so you can go about fixing the problem.
Quote:
Originally Posted by frW;15340390 
Ah.

And How will I notice that it does not work? Like this?

Yes, that is a memory or IMC error.
Edited by Blameless - 10/17/11 at 11:36pm
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post #18 of 41
Quote:
Originally Posted by frW;15350675 
Looks like this now:

308806_10150499284322501_648472500_11355278_2131715842_n.jpg

I've got everything on "Auto" in BIOS, the "funny" thing is that the DRAM Voltage is 1.65 but the RAM spec says it's just tested for 1.5v, so I guess that might be what makes it stable?

Anyways, 1 pass = 8 hours, letting it run during my workday today as well.. smile.gif

It looks good. X58 can handle 1.65v.

What you need to check is what the XMP set the QPI/vtt voltage to.
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post #19 of 41
Thread Starter 
Quote:
Originally Posted by Blameless;15350751 
One DIMM per channel means one DIMM per channel.

You have three channels, if you install more than three sticks, the XMP settings are not guaranteed to be stable, and they probably won't be.

You will almost certainly need to manually adjust timings and voltages to get six sticks fully stable.

Do not use XMP, even in a supported configuration. The automatic timings are stupid, and the QPI/VTT voltages are often dangerous.

Memtest86+ is not a good memory stress test. It will test basic functionality, but won't but any where near maximum, or even a real world load on the memory sub system.

If you were getting errors in HCI Memtest for Windows, you are having problems. Stress testing is not about cycling tests until you find one that passes, its about finding the test that fails, so you can go about fixing the problem.



Yes, that is a memory or IMC error.

I see, so if I run my RAM in 1600MHz it's the same as running XMP in this case? I still can only run one DIMM per channel? I didn't enable XMP but only set the DRAM Frequency to 1600MHz and the other frequency to 2400MHz ( DRAM Freq. * 1.5 ).

Ok I will try HCI Memtest as well to see if it is stable, but if the "basic" memtest-dos-program finds an error, it's most certain that HCI Memtest will to?

I will check the voltages when I get back home, is it a solution for me to just run the RAM in 1333MHz instead of 1600MHz?

Thanks a lot (again) Blameless you always seem to have the answers.. smile.gif
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post #20 of 41
Thread Starter 
Quote:
Originally Posted by Ken1649;15350784 
It looks good. X58 can handle 1.65v.

What you need to check is what the XMP set the QPI/vtt voltage to.

I think it's set to 1.2v, is that too high? Yeah I know X58 can handle 1.65v just worried the RAM's cannot.

A side note, in BIOS I set the DRAM voltage to 1.654 because the other option was 1.64, is that "correct"? If I select 1.654 I get a big red warning in BIOS about not using too much voltage, but in Windows it says it's "exactly" 1.65v.
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