Overclock.net › Forums › Intel › Intel CPUs › 3930K Memory Controller problem (possible solutions?)
New Posts  All Forums:Forum Nav:

3930K Memory Controller problem (possible solutions?)

post #1 of 31
Thread Starter 
Hey guys...

I upgraded to a 3930K last week over the 3820 I had purchased. I've run into a troubling issue. My system will no longer recognize my full 32GB of RAM. It only recognizes 24GB. I've done a boatload of research and have been troubleshooting with computer friends... and it sounds like an IMC issue.

Current troubleshooting:

- I've upgraded my BIOS
- I've tested each individual stick of ram one at a time in the main RAM slot... each works fine, they each boot the computer up on their own.
- my BIOS shows each stick of RAM posting to the system... but the ram total is only showing 24GB instead of 32GB.
- I've bumped the voltage for each DIMM side to a max of 1.75volts. I've bumped voltage for VTTDDR. I've increased the IMC skew (not sure if done correctly.. b/c in my BIOS there are 3 signals per DIMM side... and it looks confusing. I could use some help here if you're familiar w/ increasing IMC voltage in th ASUS bios).
- I'm running in XMP mode
- I've lowered the frequency to 1600MHz and 1333MHz
- I turned off my 3930K OC and ran it at stock speeds.
- Lastly I increased the ram one stick at a time. With 3 sticks loaded up in the correct slots (per the mobo manual), it goes to 24GB. The 4th DIMM in slot A does not give it the final increase to 32GB.. it just stays at 24GB.. even though it recognizes that the 4th DIMM has been added!!!

I can't think of anything else to do but get a new board. Unfortunately I cant RMA this board since it's second hand... but my buddy is willing to buy it back from me.


Important Specs:
i7 3930K
ASUS Rampage IV Formula
Kingston HyperX Red 1600MHz 8 x 8GB
Platimax 1000W PSU


What should I do at this point? I'm not sure how to resolve. After having 32GB of ram loaded w/ my 3820 on the same mobo, i'm not happy w/ 24GB. I'm weird like that... it would be a slap in the face. I'm a music production guy... so the ram is actually useful to me, unlike most gamers and etc. I could have 8GB more of instrument patches open.... it can be a big deal.


Option 1) Keep trying to troubleshoot in this board.
- ARe there any additional tips you guys could lend? I hear this is a normal issue w/ the memory controller being ondie for the 3930K etc. But. it's also ondie for the 3820... so what gives? The only other thing I can think of is to reseat the CPU, which I haven't done yet.

Option 2) New RAM?
Is the ram the issue? Should I try to sell it off and buy new RAM? I dont want to do this since i'll lose some money on the deal... but if that's what it takes to get it oworking.. i'd like to know the option is there.

Option 3) New mobo
This is the option i'm leaning towards at this point. I see a Gigabyte GA-X79-UP4 mobo i can grab from a local Micro Center for about $269... very good price in my eyes. It would also gives me up to 64GB of RAM max so i can upgrade in the future... as opposed to the 32GB max on my RIVF. But am i likely to run into the same issues? If so... i feel completely stuck.
- Also... I have my i7 3930K OC'ed to 4.8GHz on this ASUS. very very nice!! Could I expect similar results on the Gigabyte board? I'm not looking to go trade off more RAM for a slower CPU OC.



Thanks guys... love this site. I wouldnt have been able to come this far without your help. Could really use your assistance. I believe this is the last piece to my music production computer puzzle. I was totally GOOD w/ the 3930K upgrade and performance is where i want it... now this nagging issue arose and is making me pull out some hair. WHY CANT THINGS JUST WORK lol
Edited by CPhoenix - 5/10/13 at 12:04pm
post #2 of 31
Probably a stupid question but you never know, the simple things could be missed...

I know you said you upgraded the BIOS but have you cleared it completely yet and started from stock to see if it recognizes it?
post #3 of 31
Remove the cpu and check for bent pins or debris, like lint or a hair, in the socket.

If all is clear, install cpu again and install the heatsink with even pressure and not too tight.
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
post #4 of 31
Thread Starter 
^Man no question is stupid at this point... i'm willing to try anything. To answer the question... i'mnot sure actually.

When I updated it... it loaded w/ default settings, and I read to re-do all of the changes I made. But i didnt technically go in and select any options to clear it.

Lets me do that and reseat the CPU now to see what happens.
post #5 of 31
Try a different chip in the board. You really will only be able to tell what's the problem by trying new parts in your system. If you can borrow a new chip or a new board from someone, then that would help.

Also, have you updated the BIOS? That could be the problem.
post #6 of 31
Try clearing CMOS adter reseating CPU and leave everything as is and see if memory is showing. Think that's the best idea everyone is coming up. Short of trying different parts that is
post #7 of 31
Thread Starter 
Quote:
Originally Posted by Art Vanelay View Post

Try a different chip in the board. You really will only be able to tell what's the problem by trying new parts in your system. If you can borrow a new chip or a new board from someone, then that would help.

Also, have you updated the BIOS? That could be the problem.

answered above. thanks!
post #8 of 31
Thread Starter 
RESEATING WORKED!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Fan..freaking tastic! THANKS GENTLEMEN!

Now... this has begun another issue!!!! I think i touched the thermal paste a bit by mistake. Got a few smears on my fingers. So now the same OC I had going that was extremely stable at 4.8GHz is now somehow causing it to overhear. I had to dip down from 48 multipler to 44 multipler. I'm using an Antex Kuhler 620. Works pretty damn good overall, but now i've got this problem. I cant help but to laugh... b/c its always someting.

Should grabbing some thermal paste do the trick? I was hoping it wouldnt be that tempermantal (no pun intended). Or should I let it run for a while at low OC to sort of "settle back" in?
post #9 of 31
Good news!thumb.gif

Just redo the paste.
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Xeon E5-1680 V2  R4BE  TITAN X (Pascal)   2666 Dominator Platinum CL10 
Hard DriveCoolingCoolingOS
750 NVMe 1.2TB EK HF/rx360/rx120 EK FC/GTs/mcp655 Windows 10 Pro  
MonitorPowerCaseAudio
BL3200PT 1600 T2 800d Pro Audio 2.1 + DragonFly Red 
  hide details  
Reply
post #10 of 31
Thread Starter 
Okay... so before i went n got paste, i loosened the cooler back up a bitand it seems to have steadied out so far. time will tell though.

but... i haven't gone back up to 4.8 out of fear from all of this. i'm sitting at 4.4 so far.

do you guys think i should be worried w/ these temps i'm getting?
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › 3930K Memory Controller problem (possible solutions?)