futuremark2

It used to be 3.99GB usable for a couple months then this happen just now with the same settings.  I tried disabling HPET and still it does 1.99GB.  What is wrong with my PC or settings?
 

futuremark2

So I started by turning the pc off and touching the memory sticks and wiggling them a bit, now I'm back to 3.99GB usage instead of 1.99GB : )

greystone

futuremark2

So I started by turning the pc off and touching the memory sticks and wiggling them a bit, now I'm back to 3.99GB usage instead of 1.99GB : )

How much RAM are you showing in BIOS. If BIOS is showing less then 6GB then it's likely the board.

The Russian

Make sure you have "msconfig->Boot->Advanced options->Maximum memory"  disabled because it used to cause the exact problem for me.

jwevans

futuremark2

It used to be 3.99GB usable for a couple months then this happen just now with the same settings.  I tried disabling HPET and still it does 1.99GB.  What is wrong with my PC or settings?
 

I have the EXACT same issue - 6GB - Motherboard recognizes it as does Windows, but it shows 1.99GB available.
 
Using Classified X58 SLI - Windows 7 x64 - ALL NEW / FRESH INSTALL OF EVERYTHING and problem since day one which was just 3 days ago.
 
I've adjusted everything in the bios I can think of.
 
I've upgraded every single driver to the latest driver from the Mobo and Video Card which is the EVGA 260 w/ 896 MB on it and I'm using supported Corsair Memory, have checked it's in the correct slots and have no other issues.
 
I have looked everywhere and cannot find any "real" answers or anything I haven't already tried.
 
If someone doesn't respond to our thread tonight I guess I'll just call tech support on the phone tomorrow when they open.  I really want to be able to use all 6GB of my memory obviously, otherwise I just would've purchased 2GB, lol.
 
PLEASE SOMEONE HELP US!
 
Thanks all!
 
--Jason

HalloweenWeed

jwevans

and I haven't seen ONE PERSON SAY "FOR SURE" WHAT OR EVEN "IF" THEY'VE "FIXED" THE PROBLEM

[...]

and I just can't believe so many people have this problem yet with all these people having this problem and it obviously NOT being an isolated incident, I've seen not ONE "fix" for anyone or by anyone.

15 solutions, and I didn't even include the ones that have their mobo in RMA:

grd003

Like everyone else here, I too had the Disappearing Ram problem, which were shown as missing during boot. And, hot or cold, I could not run the ram at its highest rated speed even with retarded timings. CPU was always at 4.3GHz (bios SZ21), with only 6GB of 1600MHz Mushkin Redlines.

One day I got angry--really pissed-off. So I grabbed the CPU heatsink and shook it round and round in an effort to ensure all 1366 bumps (not actually pins, are they?) were seated. (this is not recommended for obvious reasons, since you would have to be lucky not to do more damage than good.)

Then I removed the three ram sticks and re-installed them with particularly hard downward pressure--but also _with_ significant side-to-side motion. (of course you could wreck things this way.)

But those two mechanical actions fixed my Disappearing Ram problem. And they would then run at their top rated speed. Unfortunately I don't know which of the two was the actual fix.

And, surprisingly, I was able to add another 6GB for a total of 12GB--BUT--Geil Ultra, i.e., Mixed Brands! Mushkin and Geil. 1650MHz, 7-7-7-24. Been running perfectly for six months.

Alucard666

When it happened to me it was due to a bad stick of ram that happened as a result of a bios flash to the newer 44 and 49 bios'. I would choose an older bio and rma the ram

fanboy

I had this issue with the OCZ Gold only showing 4Gb in Windows and E-Leet .. i ran it aday or two like that as it was very stable and not a rebooting mess the the G-Skill was .. now i decide to pull all the ram out and switch sockets as to reinstall them and this time i made sure to keep them even going down in the slot (side to side) and pushed the h e l l out of them as to leave an inprint of the pcb in my fingers and it's now shows 6Gb running Triple Channel and has been cold booted more than once and still working great and that all i did.

I am thinking it's the ram slots myself as they are just to tight and it could of been my issue with the G-Skill also as it was getting odd memory errors but it was showing 6Gb Triple Channel.. it crashed after post sound or before windows or while loading desktop but would game like a champ.. you guys try what i did and see if it works.

hashiee

Just to let you know I had this problem before and corrected it by shifting my cpu.  After reading this thread I went and tried to lose memory total on two different boards (both x58 760) and two different cpu's (w3520, w3540) and was able to lose memory total  by shifting the cpu's around. If you take a look there is a little play in the cpu socket and just enough to give you a problem. On one of my boards it was very difficult to lose any memory but was still able to duplicate the problem. So if you haven't tried to re-seat the cpu, try it it and as others had suggested over tightening can cause a contact problem also.  Also check to see that all the pins in the socket are not bent, very easy to with the design of it.

Bios E760 - 43

EnochRoot

In my case, I found a combination of issues.  Bent pins on the CPU socket and 2 dead sticks of ram out of 6.  I had to RMA the ram twice, RMA the motherboard once, and now I'm able to detect 12GB.  But even with the bent pins, I could detect 3 slots or 6GB of RAM.  There was no indication of a pin issue until all 6 slots were occupied.

To be frank, the leafy socket architecture of the i7 sucks.  The RAM fault tolerance and testing sucks.  I miss my old socket A athlon design.  You stick it in and you can put a brick on it with some toothpaste and it ran.

In any case, just keep in mind that if your VTT and DIMM voltage doesn't correct the issue, start ripping it apart.  Check the cpu pins and test each RAM module (in the second socket away from the cpu) to validate it's not dead.

fdieu0087

Ok, I just reverted back to bios SZ21 and all is back to normal.  As soon as I reboot the bios was showing 9gb instead of the 3gb with the latest bios.

So for anyone who's having problems and pulling their hair out, just revert back to an older bios (one that you know works).  I wish EVGA would come forward and address this issue.  From the rising number of posts regarding this issue, they should at the very least provide a simple troubleshooting guide or update the bios changelog to reflect current issues.  Would have saved me a couple hours as I surely would not have updated the bios had I known about this earlier.

Maybe we should compile a list of bios' that do not suffer from ram disappearing.

fdieu0087

Yes, this is a permanent fix..at least for me it is.  I'm sure if you went back to an older bios that you had everything running smoothly on it would be a viable solution.  If you still having issues after reverting, then I suggest testing each stick of ram one by one.  No way to really tell if there's an issue with the board unless EVGA comes out and says so.

saxton

I updated my BIOS the other day for the first time in 6 months or so. put my setting right, and didn't think anything of it. The next day I noticed a lot of disk thrashing when I started playing WoW and noticed my memory was being used. I couldn't understand what was taking 6 GB of memory. I always had a couple of gigs left even when playing WoW. As I am taking a close look tonight, I see that I only have 2 GB available out of the 6 GB. It wasn't until I found this out that I started troubleshooting the issue. I plan on going back to an older BIOS and seeing if that fixes the issue as it didn't crop up until I upgraded. Tooooo much of a coincidence if you ask me.

I'll post my findings...
Sax

Update... So, in the wee hours of the morning, I downloaded an older BIOS and flashed it from within Windows 7 using the flash tool. After a reboot and reconfiguration of my drive settings, I was able to boot back into Windows and voila, 6 GB of memory detected AND available.  So yes, in my opinion the latest BIOS breaks something and the full amount of memory does not appear as useable to Windows. After I downgraded, I logged into WoW and no more disk thrashing because of low memory errors. I have not flashed back to the current release to see if the issue returns. I've got a raid tonight and don't want to be missing out because of this issue. :P

EVGA, prettly please with sugar on top, look into this deeper!

Full Metal Folder

Hello
I had the same issue  with my OS finding 6 gb but only 3.99 usable.
Then i notice E-LEET was showing my ram running only on two chanels, i removed my ram and inspected it, and found a piece of hair
in the memory contacts lol.

That was my problem, so make sure the ram sockets and ram contacts are clean.
The other problem i have is that my ram wont run at 1333, it goes to 1060 on XMP profile or any other way i try to set it.
If i change it to 1333 manually it wont boot. I tried my dual channel 2000mhz viper and it works up to 19++mhz CPU@ 4.0GHZ

X58 LE
920D0
1333 Viper 9-9-9-24-1T

johnksss

posted this in another thread...but it appears to be the memory socket on the motherboard. i do have the dissappearing ram from time to time. and it only seems to happen on the 760/761 boards for me. i found that on both boards..i would have to wiggle the ram around in it's socket (number 5) then very carefully put the fan back on. then it was fine. i would rma yet again..but this board can boot to windows at 230+ bclk or 4.8 ghz...so i have been reluctant to send it in....

GhostImage

>>>

One more thing That I found out just couple of days ago. For some reason  I happened to change one setting In control panel.
system tools/ System configuration/ Boot tab/ check Maximum memory. 12gb
Boots fine all that jazz all 12 gb present on a POST However In control panel /system shows 12gb installed 9.499 useable. (sounds familiar Right :) )
Same in resources managment - it showed all 12gb present but 2.5 gb reserved for Hardware reserved. ( I have memory low gap set to 2.5 (two GTX 285 1gb + gts 250 512mb)
Went to bios, set MLG to auto Reboot, All 12gb present at POST,
In system and Resources Management 12gb installed 9.99 usable, and 2gb reserved for Hardware.
To be honest I got confused for a while. I started thinking Is my memory acting up now. Am i loosing my mind. Ran Memtest again No red, on 8 passes.
Finaly I unchecked that stupid box in Boot Tab. And all Ram is there. System 12gb installed and RM shows 11109 mb available (OS always reserves 900-1.2 gb for itself)
I have no Idea what this MLow Gap feature is for. (reserved for PCI devices) If you got 1videocard with 1gb of ram, with this feature on auto it will reserve 1gb of your ram for it, Two GPUs - 2gb In system feature in OS you will see 4.99 usable and 3.99 usable accordingly.
     So again just to make it clear: go to Control Panel/Administrative Tools/System Configuration/Boot tab/Advanced options/ uncheck maximum memory box.   Apply, reboot. You should see 12gb or 6gb installed in CP/System.
As for MLG in bios I set It manually to the combined amount of GPU ram. So Tri SLI should be set to 3gb Sli to 2gb, etc.
I hope it was of help

xspectrev2

I had posted on the same topic a few days back, and finally found out what the problem was. The x58 sli le (my motherboard) doesnt support certain types of ram, and the patriot viper @1333Mhz happened to be one of those. So no matter what settings I changed, it would still only have 3.99gb usable out of 6gb. Went back to tiger, swapped them out for a corsair platinum and they booted first attempt with all memory usable :). Btw Tiger does offer a 14day return policy on everything, they might charge a restocking fee though, mine was like 4$.

luckyluke

Well, i think i resolved the problem.
I disabled HPET MODE and voila!

McLaren__F1

Issue Resolved. What i did was downgrade back to BIOS 64 and it shows the full 6GB when i OC  to 4.0 GHz.

Thanks for all the Replies

ytmwang

sorry I don't have any useful solutions, but I just wanted to throw my voice in the mix. My x58 SLI LE suffers from the same problem. Since purchasing it, I've returned and replaced it once already, both memory and motherboard. The Corsair memory I have definitely isn't the issue. It seems to be the motherboard. At stock, I usually have to start the system up, turn it off, and then turn it back on again in order to get all 6 gigs to be recognized. I've tried updated the BIOS to the latest version and of course memtest86+ showed that all sticks were normal. At least I'm able to get to the point where the system will recognize the 6 gigs. *sigh*