Please keep this thread alive! I keep logging back in lurking and hoping for a BIOS update or something that might change this situation. It is almost unforgivable to have THIS many people with the same problem and no official word. 

I'm having the same issues with a new X58 SLI Micro board. Memtesting each stick of GSkill F3-16000CL9 passes OK:

But If I load all three I get this:

 
So I guess it's the board. I'm running Bios 44. Is there a better bios out there?
This is my first build using X58/i7 components and it's been a nightmare.........

tsunami231

 I only seem to have this disappear ram problem when I try to run the ram at 1600 any speed lower and  all 6gbs is picked up this on a 757 44

I also tried that tsrRdTRd and tsrWrTWr at 6, booted one time  wiht all 6gbs at 1600mhz and this is with the cpu at stock speeds tried vtt from +150-+350 and QPI from 1.300 to  1.450 and nothing

Changing the frequency of the memory has no effect on the outcome.  I've tried 1066/1333/1600 as well as "auto".


:-(

Anyone know WHICH pins to check for this "bent pin" problem?  Did EVGA get a bad batch of sockets with bent pins?  As I recall, there was a plastic cover over the pins when the board was unpacked.  You'd think this would protect the pins during transit.

Support got back to me and basically said to check for bent pins on the socket.  I'm so thrilled....since that means I need to take the motherboard out AGAIN (no clearance to get to the heatsink attachment screws while it's installed in the case.  :(

Best,

hell no when I bought all these computer parts I bought  a warrenty from the store which covers the ram cpu and mb and if there fault they will let me replace them with equal or greater value  if i pay diffrence, so far I replace the memory  MB is next cause of bent pins but i not  expect this to fix the problem seeing how wide spread the problem is

While the older bios copuled with the  tsrRdTRd=6 tsrWrTWr=6 does in deed get me 1600mhz and 6gbs about 3 out 5 boots which way more then the new bios I get errors in Prime blend test so im gona replace the MB, as soon as I can  motivate my self to pull  it all apart again maybe the bend pins are why i get the 3- out 5 boots with 6gbs

I am experiencing similar problems with my x58 sli board with a 6GB set of OCZ Gold memory chips.
On a cold boot only 4gb of 6gb will be seen in bios. When I see that it is only seeing 4gb I quickly hit my delete key to get into the BIOS and simply save settings and exit. Upon reboot all 6gb are seen and all is well until the next cold boot and I start my process all over again.

The few times I have missed getting into the BIOS I will let it run with 4gb due to hassle. But sometimes when I do that I get a BSOD related to a memory problem. When I reboot usually all is well. One time my whole system got oddly corrupt but I was able to do a rollback. Now as a habit I am always setting a new restore point so that I have an easy fallback solution.

At first I thought this was a memory issue and bought another set ( I wanted 12gb anyway). The new memory did the same thing all by itself and with the other memory added. I did several configurations in different slots always with the same result on a cold boot. If there were 6gb installed, only 4 would be seen, if all 12gb were installed, only 8gb would be seen. Upon entering the bios and doing a save and exit, all would be happy again. I decided to send the new set back while I could and suck up a restocking fee because I was still worried it was the memory.

I just flashed my board back to the SC21 BIOS to see if this makes any difference. I am more skeptical than ever after reading about this problem all over the internet. I will report back if there is any luck with my BIOS rollback.

I have just recently ran into this problem as well.  I have looked at the CPU socket under a magnifying class and several of them look bent to me. It started out throwing memory errors when running LinX.  Then the system would randomly not post.  Now it refuses to post at all with DIMM slot 5 populated.  So I was running it with just slot 1 and 3 for a while then the same sequence of events started to happen and now I am just down to slot 1.  I have ran Memtest on every stick of RAM and they all pass so it is not the RAM.  It has to be the pins that look suspicious to me causing the issues. My question is how are so many people getting bent pins? I have had 4 different socket 775 motherboards and processors and never ran into this issue before.  Between those 4 systems I must have remounted heatsinks at least a dozen times without issue.  Fortunatley I am still under my 30 days from the egg so the RMA has already been approved.  Are other manufactures having this same issue?
I do have a pretty good theory though on why this may be happening. I think it lies in the 1366 and 1156 design and how they now have the backplate on the back of the motherboard now.  In case people don't understand here is a picture of the back area of a 1156 Motherbaord where the CPU socket is.



Now with the backplate for a lot of the heatsinks out now the backplate is straight and therefore when mounted against the backplate on the back of the motherboard it could cause uneven pressure to be distributed when tightening the heatsink down because the backplate on the back of the motherboard does not extend out to the mounting holes.  Just a theory like I said :) I think this is what happened to me as the backplate for my VapoChill is one solid piece of stainless steal that extends out past all the mounting holes by about 3/8 of an inch.  So you can see with the CPU backplate being smaller than my backplate it kind of acts like a teater totter if more pressure is applied to one side versus the other. I found some mounting kits for the 1366 sockets that come with backplates that are bent to cross over the back area of the CPU backplate so hopefully when I get my new board this doesn't happen again.

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.

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 

evgakuki

Alucard u want to say that because you updated your bios your stick of ram was damaged?

that's first time I heard something like that.....

Anyhow, I still have problems with my setup. Usually I boot with 4 GB only (rarely with 2GB) but after 2 restarts my system can see whole 6 GB and everything is OK.

I am waiting for some new components when I will dismount cooler and check CPU, but I must emphasize once again that system was working without any problem for more than 1 year and only after bios update, my system has problems with detecting memory. Story that my mobo pins are somehow got twisted or whatever is $"§$"§%$ story for me.

Best,

Well from what I've read every bios from 44 onwards has had issues with tweaking ram settings and timings and thus yes, I do blam those bios' for the ram failing... it happened to my corsair with 44, and killed my mushkins with 49, I'm staying away from any bios flashes for a while....

Dude. Remove your m otherboard serial number.

Darkmaster06

up up up

NO! NO! NO! Read TOS. Bumping not allowed.

  It seems to me that people are having two different issues here.  Some folks are loosing ram in the bios and others see the ram in win 7 but with a lesser amount usable.
  Checking the ram guy forums, at Corsair, will quickly show you that it isnt just EVGA.  I see posts from several other board manufacturers dicussing the same limitations.
  Here is something to boggle your mind, last night i finally made the switch to win7- on my i920/x58 setup- and upon doing so i found the system issue of 12gb showing but only 7.99 is usable.  The ram shows fine in loads of testing at 1600mhz and has never given me a single issue untill reformatting and loading win7. 
  To clarify...I made ZERO hardware or bios changes and simply ran a low level format and then installed windows 7.  Vista never gave me this problem.  Doing everything you folks said as well as "the ram guy's" methods of tuning the dimms has had no effect....which is why i think we have two completely seperate issues blending into one thread....or many threads.
  Clearly, some people have fixed their issue through tunning or fidgeting, so in those instances i think its obviously a hardware issue, but for those of us that simply have the message stating usable ram as less then total ram it seems to be a windows 7/x58 chipset issue.
  Any thoughts?

nite138, I can't search for your BIOS template report, bc you made your profile private (that's your business). BIOS template plz, or link?