I had already tested one 6gb kit in combination with this 3gb kingston i just picked up, and the same thing happened, disapearing ram. Now i'm using the 2nd 6gb kit with the kingston and i'm 2 cpus and 3 days in with still all 9gb showing. All voltages on auto or close to default. cept vcore of course. so maybe my problem was a bad or maybe weak stick in my other 6gb kit causing problems? If i run just 6gb though i've never had any issues and passes days worth of memtest. can memory weaken or fail as more memory is added? Does adding more memory stress the currently installed memory? I've been hammering the memory and complete system the last day trying to find my max OC with this new CPU. In the past that kind of abuse would surely result in disapearing memory. I'll give it a few more days and if all is still well, i'll swap 6gb kits again and hopefully some will disapear again. That'll mean bad memory. Easy Fix.

Still rollin strong @ 4400 1.34v with 9gb 1684 7-7-7 1t 1.64v. I'll grab the other 6gb from the shop and see what happens.

Wow this is an annoying issue.  I am seeing my 12GB drop down to 8GB.  After rolling back to stock speeds and testing the memory I have come to the conclusion that in order for me to reboot I need to shutdown, power cycle the power supply, turn the machine back on.  So far this workaround has worked every time.

Yep that's the board I have.  I have VT turned on since this machine is bigadv folding all the time.  I think I have seen the behavior you mentioned, I thought I accidentally hit restart instead of shutdown but maybe it was the quirk.  Have these boards been out for a while?  This is the first time I've used an EVGA motherboard and I'm hoping that BIOS updates will make it run more predicable.

Hello guys,

I've got the same "cold boot"issue. Wish I had seen this thread before I sent my RAM for RMA.
I swapped my sticks to different slots. The thing I found was when I booted into windows (while only 4GB of 6GB detected) and looked at the CPU-Z SPD tab it showed one "empty" slot. So I shut down my system and checked the sn of the stick which was not showing. Swapped the sticks again and did the same check. The "empty" slot was again the same stick. I tried every combination and it was the same stick which wouldn't show every time.

Did anyone else tried or noticed this?

Seaquest

Hello guys,

I've got the same "cold boot"issue. Wish I had seen this thread before I sent my RAM for RMA.
I swapped my sticks to different slots. The thing I found was when I booted into windows (while only 4GB of 6GB detected) and looked at the CPU-Z SPD tab it showed one "empty" slot. So I shut down my system and checked the sn of the stick which was not showing. Swapped the sticks again and did the same check. The "empty" slot was again the same stick. I tried every combination and it was the same stick which wouldn't show every time.

Did anyone else tried or noticed this?

Yes, this quite a common issue with x58 platform. Swapping ram is definitely one of the ways to check for faulty ram. In your situation I think that was the case. With my built I was loosing 2gb only at high Bclck. above 180.  So ram not always at fault. So some additional tweaks needed sometimes.
Cheers

Ha, Is everything in order now? I assume after you RMA it, new kit doesn't giving you any problems?  Also You said it was the same stick that was missing in different slots. So that made me think of defective ram module. ;)

Seaquest

I also thought the module was defective. I'm still waiting for my new kit. It's been 3 weeks now since my RMA. The store I bought them has nothing in stock at the moment. The G.Skill's are very hard to get in the Netherlands.

So for now I'm using my laptop. Until my other build is ready.

:( Sux.   Can u let us know what kind of result you gona come up with after you get your Ram back. Thank you and good Luck.

GhostImage

:( Sux.   Can u let us know what kind of result you gona come up with after you get your Ram back. Thank you and good Luck.

Sure, no problem.

JJ Says Nay

GhostImage

Check out this thread http://forums.evga.com/tm.aspx?m=16223 there is some good info in there, maybe some will be of help.
Cheers :)

Hey, Ghost. I saw your thread a little while ago but I really don't understand exactly what you did. It's probably just me, I could just have a lack of understanding. Thanks.

Lol its not you Man its me. I cant sometimes to understand myself. I felt kinda leery to post. But its past now. So I truly appreciate you remark.
Thanks.
I edited the first post guys I hope Its more comprehensible now.

that is exactly the RAM I am using (the redlines) and have exactly the same problem.
 
Have you got any solution yet?

mizarus

hi there guys, Having the same problem with on my EVGA x58 SLI, and from what ive seen on google, its happening a lot on Win 7 Systems, tryed some of the advices above, no luck so far, 7 sees all 6GB of ram but it says only 3,99 is usable, CPU-Z sees all the 6gb and no errors from memtest so far.
going to do some more diging later, is there any chance that its an OS issue?

Hello. Im not really sure if it is OS problem. At some point in time I was thinking same thing. Maybe partially it is. Let me ask you this. Is your memory low gap set to auto if yes than try changing it. With each change check you hardware monitor in windows to see were is your ram assigned to.  Along with unchecking/checking max memory in advance boot options.
Some people say that x58 is really picky with ram. So maybe trying another set of ram would be an option.
Any way Good luck. And let us know If you work it out.
Thank you.

HarryHaller

that is exactly the RAM I am using (the redlines) and have exactly the same problem.
 
Have you got any solution yet?

Well, I am sick of reading around and not finding a solution. I have spent hours on problems with this CUTTING EDGE motherboard... what a fiasco. EVGA, you won't see a single dime from me or my customers in my LIFETIME. **** this crap. I spend money on solutions not problems. At the end of the day, EVGA should have already acknowledged this is a generalized problem with THEIR product. Trying to cover it with misguiding half-ass answers by support won't help their case but actually make them lose customers forever, just like they just lost me and the about 90 people whose mobo brands and computer components are decided by me.

I completely understand your frustration. However putting all the responsibility on EVGA shoulders would be improper. Intel makes CPU with IMC. EVGA has no control over it. MicroSoft makes windows. Chipset made by intel as well. I owned and own a lot of EVGA products, Motherboards among them. Sometimes it takes some effort to get it going (OC ed i mean) but once you do, its a rock solid machine.
Just like the guy above you stated. It might be OS problem. Not Hardware. If all you RAM is present upon POST than its not memory or motherboard problem, (or very unlikely) Cause windows itself on the boot reserves N amount of Ram to PCI devices, Why i don't know yet. But Ill keep looking around. From what I read its common with x58 chipset not just EVGA.
So just try not look at it as to who's fault is it, but How can I make it work. I hope you'll understand that blaming EVGA not gona get you anywhere but to a  bad headache.  So I wish you more patience and Good luck.
Thank you.

All I know is that by changing the frequency of the memory to 1333 and then back 1600 fixes the issue for two days, and then I have to do that annoying procedure once again.

Excuse me, but this is the mobo's fault.  That has nothing to do with Windows or Intel.

It is a BIOS/mobo problem.

Triple Post FTW

HarryHaller

http://support.microsoft.com/kb/978610

This is expected behavior on computers that are running Windows 7. The reduction in available system memory depends on the configuration of the following:

• The devices that are installed in the computer and on the memory reserved by those devices
• The ability of the motherboard to handle memory
• The BIOS version and settings
• Other system settings

Note When the physical RAM that is installed on a computer equals the address space that is supported by the chipset, the total system memory that is available to the operating system is always less than the physical RAM that is installed.

For example, consider a computer that has an Intel 975X chipset that supports 8 GB of address space. If you install 8 GB of RAM, the system memory that is available to the operating system will be reduced by the PCI configuration requirements. In this example, PCI configuration requirements reduce the memory that is available to the operating system by an amount that is between approximately 200 MB and approximately 1 GB. The reduction depends on the configuration.


There are several additional situations that could cause the usable RAM to be less than expected. These issues and possible solutions are listed here:
Check the system configuration settings
This problem may occur because the Maximum memory option is selected incorrectly. To fix this, follow these steps:

1. Click Start Collapse this imageExpand this image
   
   
   , type msconfig in the Search programs and files box, and then click msconfig in the Programs list.
2. In the System Configuration window, click Advanced options on the Boot tab.
3. Click to clear the Maximum memory check box, and then click OK.
4. Restart the computer.

Update the system BIOS The problem may occur because the system BIOS is outdated. If you have an older computer, the system may be unable to access all the installed RAM. In this case, you have to update the system BIOS to the latest version.

To update the BIOS on the computer, visit the Web site of your computer manufacturer to download the BIOS update. Or, contact your computer manufacturer for help.
Check BIOS settings The problem may occur because some BIOS settings are incorrect.

• Enable the memory remapping feature
  
  Check the BIOS settings to see whether the memory remapping feature is enabled. Memory remapping gives Windows access to more memory. You can enable the memory remapping feature in the BIOS by booting to the system setup. See the User's Guide for your computer for instructions on how to boot to system setup on your computer. The name for the memory remapping feature may be different for different hardware vendors. This can be listed as memory remapping, memory extension or something similar. Be aware that your computer may not support the memory remapping feature.
• Change the AGP video aperture size in the BIOS settings
  
  Check the BIOS settings to see how much memory you have allocated to AGP video aperture. This is the memory that the system is sharing with the video card that is used for texture mapping and rendering. This memory would not be used by the system, because it is locked by the video card. You can adjust the AGP video aperture size in the BIOS. Standard settings are "32MB,""64MB,""128MB,"and "Auto." After you change this setting in the BIOS, restart your computer, and then check the usable memory. You can test each setting to see which offers the best results.

Check possible issues with the physical RAM The problem may occur because there are issues on the physical RAM installed.

• Check whether you have bad memory modules
  
  To check whether you are experiencing this issue, turn off the computer, unplug the computer, and then swap the order of the memory.
• Make sure that the memory arrangement is correct
  
  Refer to the User's Guide of the computer to determine in what order the memory modules should be inserted into the memory slots. The system may require you to use specific slots when you are not using all the available slots. For example, the computer has four slots available, but you may have to use slot 1 and slot 3 if you want to use only two memory modules.
• Check whether memory standoff cards are used
  
  If you use a memory standoff card to hold multiple memory modules on the computer, the system may require specific configurations for this scenario. Therefore, the usable memory may be less than expected.

EVGA MANUAL

Memory
These settings are display-only values that are determined by the BIOS POST (Power-On Self Test).
[lang=zh-tw][lang=zh-tw]  Base Memory
BIOS POST determines the
amount of base (or conventional) memory installed in the system.
[lang=zh-tw][lang=zh-tw]  Extended Memory BIOS determines how much extended memory is present during the POST.
[lang=zh-tw][lang=zh-tw]  Total Memory This value represents the total memory of the system.

Correct me if Im wrong But I always thought that Memory Low Gap would be a part of it.  Another part of it is your PCI-e aperture = payload size.

Example:

eva2000

quote=
Yup as you raise lowgap you loose physical available memory and it's normal

Memory LowGap: is for mapping local memory (add-on-cards) to system memory address size. It most like AGP port Aperture size or PCIE1gen 250M fixed mapping size. Extend it can solve when if "add-on cards" request a bigger size as like we would like to enable Qual SLI on NV new 295, it must be extend over 2048M. Can confirm that with 2x HD4870x2 in Crossfire I had set my LowGap to around 2176 at least. With Highpoint 3520LF PCI-E x8 256MB cache controller added into HD4870x2 Crossfire, I needed at least LowGap of 2560 otherwise windows boots to a blank window and doesn't go any further. As to how this effects windows available memory, with single HD4870x2 installed and 3x1GB memory, if I set LowGap to 2560, WinXP Pro SP3 32bit sees 1.5GB available memory. If I set LowGap to 1024, WinXP Pro SP3 32bit sees 3.0GB available memory IIRC.

I never used an GTX 295 but I read you loose more memory/need higher lowgap than HD4870x2. My HD4870x2 is fine with lowgap at default 1536 and even at 1024. But once you play with 2x HD4870x2 + other PCI/PCI-E devices, lowgap needed goes up

Reason why for high end GPUs 6GB is better than 3GB memory

End quote. 

From here

http://i4memory.com/f80/memory-low-gap-settings-16090/

and another good one  http://forums.evga.com/tm.aspx?m=125673

I hope it was of help.
Cheers