I went to MSCONFIG/Boot/Advanced options, and unchecked "Maximum memory"

If you are running the RAM at max speed - are your voltages at the right setting? At PC6400, my ram does not show up until 1.9V are applied. Though, at PC5300, 1.8V is fine.

I had a similar issue with my 132-BL-E758-A1 motherboard...  After moving the DIMMS around from slot to slot in every combination, I went back to an older BIOS and my RAM again showed 6GB…  I went to a new BIOS when it was released and it’s been fine every since.
 

Actually I just looked at my build notes and it was the BIOS chip.... not a BIOS flash.  What I mean is this.  I had the same problem with memory not reading all that I had installed.  I called eVGA tech and after many emails and posted etc,  I worked it out with them that they agreed it would be cheaper to send me just the "BIOS chip" to replace the faulty one on my motherboard to fix the problem with the RAM reading correct.  So 2 days later a BIOS chip showed up via FedEx (or US Mail) and I replaced the one that was on my motherboard (it was already flashed with the current BIOS) and it was 100% good.  Sorry about any confusion my last post might have caused.

acenightblade

Hey all. Just RMA'ed an X58 SLI LE (had a defective mem slot) and now in windows 7 64 bit it shows only 3.99 GB usable. 
I have ocz 6 gb (2gbx3) gold series ram in the grey slots. (1, 3, and 5) 
I've tried the memory low gap setting, set it to 3gb, and that didn't work. neither swapping the ram, or anything. I've already determined that the ram it self is just fine. every stick boots by themselves and works fine. I've tried the memory low gap setting (set to 3GB) that doesn't work either. Timings are set, CMOS has been cleared multiple times, tried 1 stick at a time, and still haven't figured out whats wrong with thing.
Any Tips?

Ya know, this is becoming a very common problem with this mobo.  I have seen many post's with this concern.  Me being one of them that has this issue as well.  For me, I thought it fixed the issue when I turned off the Micron controllers in the bios, and moved a couple of sata cables around.  But a few days later it happened again.  Then I noticed that every time I turn on the pc when its cold (for the fist time of the day) it would do that. (3.99GB usable)  Now, I know that for my setup, all I have to do is let it run for about 2-5 minutes and warm up, then turn off the pc completely.  Turn it back on and its fixed!  I called EVGA and that acted like they didn't know it was an issue, but I know it is.  Its all over the forums.  


It also seems that everyones situation is a little different depending on the hardware used with the motherboard.  I think it is a motherboard issue, and not a ram issue like some people think it is.  Its just impossible to have this many people having ram issues, ya know?  Either that or the motherboard needs 100% power to every component on startup, but some power supplies wont put out 100% until warmed up properly.  (Just a guess)


Still unclear on what is the issue, but if I find out, I will let you know. I think EVGA should be formally introduced to this issue and help us find a fix!  I'm not really happy after spending $400.00 on a premium motherboard that it wont use all 6GB until shut off, and turned back on...    Hope this info helped a little....

I get the same issue with the x58 LE mobo. But I can make it go away if I run my memory @1333MHz or lower. If I go higher i get the 3.99 usable?? Sh*t pisses me the f*ck off... 

Still no solutions out there?

Im betting its the memory low gap settings in the bios but I could be wrong.

acenightblade

Well remember that the RAM is showing 6GB( 3.99 GB Usable ) in Windows 7 x64, not the BIOS. As of now i actually have it running full 6GB, but its not Triple Channel. Its only Dual. I have it running in the first grey slot and the last two slots. 

You are supposed to fill all the Grey slots first so if you only have 1 in the first grey slot 1 in the last grey slot and the other stick in the last black slot you need to move the stick in the black slot to the middle grey slot.  If you dont fill the memory slots like this it can cause problems, thats why EVGA put a sticker on the DIMM slots numbering them, the black slots are only to be used when your using more than 3 Memory Modules.

Moltenlava

If you can never get the additional 2GB to appear under any circumstances (increasing voltages, lowering speeds, reseating memory) then it may be a CPU issue, the Memory Controller is no part of the CPU die.  Reseating the CPU can sometimes fix this.  Another issue could be faulty DIMM slots.

If you can get the additional 2GB to show up be lowering speeds then check each Memory Module can run on its own in the first Grey slot next to the CPU.  If all can pass Memtest86+ at their rated speeds without showing a fault then the modules should be fine.  If any of the modules show errors then they may either be faulty or not able to run at their rated specifications, an RMA of the Memory would be a likely solution.

You may have to increase CPU VTT and/or vDIMM to make the additional 2GB appear and be useable.

Make sure your setting the correct timings and voltage (vDIMM) your memory is rated for.

I've already tried reseating the CPU. That didnt seem to work either, and the board did not look warped in any way, so i doubt that is the issue.
BUT I have thought about the CPU VTT, but im not sure what to set it to, I believe I've tried +200 already but that didn't seem to work either.

Moltenlava

acenightblade

Moltenlava

acenightblade

Well remember that the RAM is showing 6GB( 3.99 GB Usable ) in Windows 7 x64, not the BIOS. As of now i actually have it running full 6GB, but its not Triple Channel. Its only Dual. I have it running in the first grey slot and the last two slots. 

You are supposed to fill all the Grey slots first so if you only have 1 in the first grey slot 1 in the last grey slot and the other stick in the last black slot you need to move the stick in the black slot to the middle grey slot.  If you dont fill the memory slots like this it can cause problems, thats why EVGA put a sticker on the DIMM slots numbering them, the black slots are only to be used when your using more than 3 Memory Modules.

That was the first thing I did when i got this motherboard. when in all grey slots, it shows 6GB(3.99GB usable). The only reason i have the stick from the grey slot in the last black slot is that its the only way that it will recognize all 6GB BUT with no triple channel :(

With the way you have your memory set up it will only run in Dual Channel, the additional 2GB in the black slot will be running in single channel.  In order to get Triple Channel you must use all 3 channels, by not using the middle grey or black slot your missing out Channel B.  You have 2GB in Channel A and 4 GB in Channel C.

What happens if you put the stick from the last black slot into the middle black slot?

You either have a bad DIMM slot on the motherboard or a bad memory channel if the stick in the middle grey slot is not detected but will work in the last black slot, it may be easier to RMA the motherboard see if that fixes it, if not you may want to think about contacting Intel.

Yes I know its only in Dual channel.
If I place the sticks in the grey slots, the system boots fine. But in windows 7 x64 it shows 6GB (3.99 GB Usable).
I doubt this will have an effect but I'll try updating the bios, i had the beta bios from a month ago i believe.

ShockTheMonky

Open MSConfig and see what it shows under Boot/Advanced Options/Maximum Memory.

I know what you are thinking, Max Memory is NOT checked. i said that earlier i think.

Moltenlava

acenightblade

Moltenlava

acenightblade

Moltenlava

acenightblade

Well remember that the RAM is showing 6GB( 3.99 GB Usable ) in Windows 7 x64, not the BIOS. As of now i actually have it running full 6GB, but its not Triple Channel. Its only Dual. I have it running in the first grey slot and the last two slots. 

You are supposed to fill all the Grey slots first so if you only have 1 in the first grey slot 1 in the last grey slot and the other stick in the last black slot you need to move the stick in the black slot to the middle grey slot.  If you dont fill the memory slots like this it can cause problems, thats why EVGA put a sticker on the DIMM slots numbering them, the black slots are only to be used when your using more than 3 Memory Modules.

That was the first thing I did when i got this motherboard. when in all grey slots, it shows 6GB(3.99GB usable). The only reason i have the stick from the grey slot in the last black slot is that its the only way that it will recognize all 6GB BUT with no triple channel :(

With the way you have your memory set up it will only run in Dual Channel, the additional 2GB in the black slot will be running in single channel.  In order to get Triple Channel you must use all 3 channels, by not using the middle grey or black slot your missing out Channel B.  You have 2GB in Channel A and 4 GB in Channel C.

What happens if you put the stick from the last black slot into the middle black slot?

You either have a bad DIMM slot on the motherboard or a bad memory channel if the stick in the middle grey slot is not detected but will work in the last black slot, it may be easier to RMA the motherboard see if that fixes it, if not you may want to think about contacting Intel.

Yes I know its only in Dual channel.
If I place the sticks in the grey slots, the system boots fine. But in windows 7 x64 it shows 6GB (3.99 GB Usable).
I doubt this will have an effect but I'll try updating the bios, i had the beta bios from a month ago i believe.

It booting doesn't mean the slot is ok and i was not telling you its Dual Channel i was explaining why its Dual Channel.

if the 6GB will show up just by moving 1 stick fromthe middle grey slot to the last black slot (regardless if its Dual or Triple channel) suggests you have an issue with that Grey slot, if it was the Memory, a setting or voltages it would not matter which slot it was in you would still only see 3.99GB usable.

What happens if you put the stick from the last black slot into the middle black slot?

Still the same. it shows 6GB(3.99GB usable)

Heres a quick thought. If i set the memory to 1600mhz, even 1333mhz, it wont boot. Gets stuck at 25? could that have any effect?

ty_ger07

acenightblade

The Volts are at 1.65. Im afraid to go any higher since its been said that it could cause damage to the memory or motherboard.

No, that would most likely cause damage to the CPU or memory but not the motherboard.  Odds are the CPU would be damaged first.
 
Why do I see no BIOS template posted?  Please post up your BIOS template.  Often these sorts of problems can be resolved by adjusting votlages; primarily CPU VTT.
 
Another thing you need to check is the CPU socket and CPU installation.  Often these problems can be resolved simply by removing the CPU and reinstalling it.  If one of the pins in the socket just isn't conacting the pad on the CPU correctly, it can cause one of your memory slots to not function properly.
 
Also, if you have your CPU cooler screwed down too tight, it can also cause issues with contact between the socket and the CPU.  This is because if the cooler is screwed down too tight, it causes the motherboard to warp a bit and then all the pins may not make contact with the CPU any more.
 
 
Just some suggestions.  All of these things have worked for others in the past for the same issue. 
 
I think we need to start the troubleshooting process over though and not go on such a wild goose chase as this thread is headed.  You really need to post a BIOS template to start working with.

I'm sorry to ask this but is there an automatic way to post a template? or do i have to write down all my settings ?

what are you on about everything you just suggested hes already been suggested and hes already tried it bar one, the securing the CPU cooler too tight but he checked to see if the board was warped and hes convinced its not.

i can only go by what hes telling me if he says its not warped then i have to take his word for it as i am not there.