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RAM slots not working correctly. PLEASE HELP

Last response: in Memory
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June 30, 2013 11:32:39 AM

specs.

motherboard intel dp67bg
intel i5 2400k
16 GB Cosair vengeance ddr3 ram
2 EVGA 550 ti 2gb running SLI
Thermaltake TR2 600W PSU

So my problem is that 2 of my RAM slots don't work. All 4 slots worked fine in this setup for almost a year. Now If i put the same stick of ram in slot 1 or 3 it works fine. 2 or 4 and i get error 27 on my motherboard. I thought it was definitely my mobo so i had it RMA'd with intel. The board they sent me did the exact same thing in the exact same slots. They sent me a 3rd one and again the same thing. Now they are telling me that it isn't the mobo but they don't know what it could be.

I was told by a friend that it could be my PSU not providing enough power to my mobo but he doesn't strike me as all that knowledgeable about this type of thing, so I was wondering if anyone else had come across this problem or what my options are to fix it.

Thanks in advance to anyone who takes the time to help me out.
a b å Intel
a c 461 V Motherboard
a c 80 } Memory
June 30, 2013 12:35:04 PM

Update the BIOS, if you still have same problem you can't do anything, that maybe the design problem. Or maybe the CPU problem.

Do you have i5-2400 or i5-2500K?
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a c 239 å Intel
a c 1578 V Motherboard
a c 1985 } Memory
June 30, 2013 5:44:37 PM

What DRAM do you have (model #) is it all out of a single package - because mixing sets, even the exact same model, can be problematic. Do you have the latest BIOS? Are you running under XMP or just on Auto?
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June 30, 2013 9:27:10 PM

cin19 said:
Update the BIOS, if you still have same problem you can't do anything, that maybe the design problem. Or maybe the CPU problem.

Do you have i5-2400 or i5-2500K?


I have the latest BIOS and it is an i5-2400

and tradesman1 my RAM is CMZ16GX3M4A1600C9 all out of the same package. was running on auto, I changed to XMP-1600 and still having the same problem.

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a c 239 å Intel
a c 1578 V Motherboard
a c 1985 } Memory
June 30, 2013 9:34:20 PM

Might try at 1333 8-8-8-24 1.5, just to see, your CPU is rated 1333, so may be having a problem with 1600....Another possible is leave at 1600 unde XMP and raise DRAM voltage to 1.55 and VCCIO to 1.14
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June 30, 2013 10:03:14 PM

Tradesman1 said:
Might try at 1333 8-8-8-24 1.5, just to see, your CPU is rated 1333, so may be having a problem with 1600....Another possible is leave at 1600 unde XMP and raise DRAM voltage to 1.55 and VCCIO to 1.14


I just tried putting it at 1333 8-8-8-24 and it wouldn't boot. had to hit the back2bios button just to get it to turn on for more than a second.
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a c 239 å Intel
a c 1578 V Motherboard
a c 1985 } Memory
June 30, 2013 10:43:31 PM

Possible the mobo has a bad slot/slots or sticks are bad can you try them in another rig
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June 30, 2013 10:52:26 PM

Tradesman1 said:
Possible the mobo has a bad slot/slots or sticks are bad can you try them in another rig


The sticks are fine for sure. i can use any of my 4 in the 2 slots that work and pass memtest every time. I have also tested them in a different setup with no problems. I just don't understand how 3 mobo's in a row would all have the same issue in the exact same slots. Intel supposedly tested the 3rd one before they sent it out and said all 4 slots were definitely working. I have read that a lot of people have had RAM problems using thermaltake psu's with this mobo but not exactly what i'm experiencing.
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a c 239 å Intel
a c 1578 V Motherboard
a c 1985 } Memory
June 30, 2013 11:02:29 PM

If you boot with two sticks, what does it show in the Advanced timings for tRFC - am guessing about 128, if so try raising the DRAM voltage to 1.55, and change the tRFC to 208, save, power daown, add the other 2 sticks and try that
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July 1, 2013 1:25:41 AM

Tradesman1 said:
If you boot with two sticks, what does it show in the Advanced timings for tRFC - am guessing about 128, if so try raising the DRAM voltage to 1.55, and change the tRFC to 208, save, power daown, add the other 2 sticks and try that


Yes tRFC was 128. I tried raising that and the voltage, than adding the sticks and got the same result. error code 27.
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a c 239 å Intel
a c 1578 V Motherboard
a c 1985 } Memory
July 1, 2013 1:37:59 AM

May be a glitch with the line of boards, they may have tested with 4 sticks, but unless they specified, wouldn't be surprised if they were 4 - 1GB sticks, never cared for Intel brand mobos, too staid
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July 1, 2013 1:48:41 AM

I was reading another thread on this forum and i might have stumbled upon the answer. I have a water cooler and the back plate sits pretty close to the slots that don't work. Maybe it's causing a short? I don't really know but I think tomorrow i'm going to take everything out and put a piece of cardboard under my mobo to see if that helps. seems too simple but I've tried everything else I can think of. Considering intel's reputation it could also easily be loose soldering or something similar, so I can get a better look at that as well. I'll update some time tomorrow. thank you for your help!
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