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Windows 7: Bad RAM? Help Interpret Memtest86 (28,416 errors then 0 errors)

14 Sep 2010   #21
josh99ta

Windows 7 Home Premium 64bit
 
 

Just got another BSOD (presumably RAM related, waiting to hear back from the Crashes and Debugging forum). Things do seem more stable since upping my RAM voltage to 2.1, but obviously I'm still crashing here and there (twice today). What's next guys? Should I up my northbridge voltage and where should I up it to?


My System SpecsSystem Spec
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14 Sep 2010   #22
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

Yes in this bios MCH is the NB voltage. I would go with 1.3 for MCH. I would also go into the advanced timing control and set to correct specs of 5 5 5 15 2T, the 2t setting can make a big difference for stablity here.
My System SpecsSystem Spec
14 Sep 2010   #23
josh99ta

Windows 7 Home Premium 64bit
 
 

Changing Northbridge to 1.3 now. In the Advanced Timing Control menu there is a lot of stuff in here that doesn't compute for me. Here is what I'm currently looking at...
Quote:
tRRD = 4 [Auto]
tWTR = 4 [Auto]
tWR = 8 [Auto]
tRFC = 68 [Auto]
tRTP = 4 [Auto]
Command Rate (CMD) = 0 [Auto]

>>>>> Channel A
Channel A Timing Settings [Press Enter]
Channel A Driving Settings [Press Enter]

>>>>> Channel B
Channel B Timing Settings [Press Enter]
Channel B Driving Settings [Press Enter]
So where to from here? Do I set tRRD through tWR to 5, and then set tRFC to 15, and finally set tRTP to 2?

EDIT: Just got a BSOD on restart after upping Northbridge voltage. Windows relaunched into the boot screen to launch repair mode, which I did. Now it's locating files and giving me the Startup Repair "Your computer was unable to start" screen and it's attempting repairs. Just asked me if I wanted to restore to an earlier point in time. I declined. Is this because of the upped Northbridge voltage? Should I decrease back to 1.2 or back down to 1.1?
My System SpecsSystem Spec
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14 Sep 2010   #24
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

The command rate change to 2T, it says = 0 Auto right now, sometimes it will Auto to 1T which hardly ever works correctly.

The cas timings looked right at auto 5 5 5 15. The rest of those numbers you can usually leave at Auto.

Try going down a notch to 1.2 for MCP.
My System SpecsSystem Spec
14 Sep 2010   #25
josh99ta

Windows 7 Home Premium 64bit
 
 

Okay. I changed that value to 2 (although I couldn't add a T to the end, it only accepted numerical values). I also backed the NB voltage back down to 1.1 because I couldn't get Windows to start otherwise. I'll try it back at 1.3 in a bit, or since I experienced problems at 1.3 should I try it at 1.2 instead or just leave it alone at 1.1?

And I can leave those other values alone (4, 4, 8, 68, 4) correct as I already have values set at 5, 5, 5, 15 on the main BIOS page right?
My System SpecsSystem Spec
14 Sep 2010   #26
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by josh99ta View Post
Okay. I changed that value to 2 (although I couldn't add a T to the end, it only accepted numerical values). I also backed the NB voltage back down to 1.1 because I couldn't get Windows to start otherwise. I'll try it back at 1.3 in a bit, or since I experienced problems at 1.3 should I try it at 1.2 instead or just leave it alone at 1.1?

And I can leave those other values alone (4, 4, 8, 68, 4) correct as I already have values set at 5, 5, 5, 15 on the main BIOS page right?
Thats ok the T assumed because it's the command rate.

The reason for using a bit more MCH voltage is because this is usually required when using 8GB of memory. I'm not sure why it's being so picky about this slight increase in NB voltage. That doesn't make much sense to me.

Correct 5 5 5 15, Auto settings seem good here. It can sometimes help to set the memory frequency down to 800Mhz for now, the 750i doesn't always work so well at 1066Mhz when running 8GB of memory.
My System SpecsSystem Spec
14 Sep 2010   #27
Wishmaster

Windows 7 Home Premium 64bit
 
 

8GB of RAM may indeed be quite a stress on the NB.

I too would set it at 800mhz for now, 2.1V ---- 5-5-5-15
My System SpecsSystem Spec
14 Sep 2010   #28
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot
 
 

Just to chime in...

If you are running the memory at 1066, you could try to loosen the timings slightly to see if it becomes more stable. Say 6-6-6-18, for instance. Running 8 GB puts a lot of strain on the memory controller, and you may have to loosen the timings to get it stable at that speed, as well as the NB voltage bump.

Keep in mind that you can also run the memory at 800 with tighter timings and achieve almost the same performance as 1066, but the important thing first of all, is to get the machine stable. So my advice would be to lower the memory speed to 800 with the timings that you have, or loosen the timings at 1066 and get it running right. You may have to accept the fact that with 8 GB, you may not be able to have the memory run at the exact specs they advertise.
My System SpecsSystem Spec
14 Sep 2010   #29
chev65

Windows 7 Ult, Windows 8.1 Pro,
 
 

Quote   Quote: Originally Posted by Mellon Head View Post
Just to chime in...

If you are running the memory at 1066, you could try to loosen the timings slightly to see if it becomes more stable. Say 6-6-6-18, for instance. Running 8 GB puts a lot of strain on the memory controller, and you may have to loosen the timings to get it stable at that speed, as well as the NB voltage bump.

Keep in mind that you can also run the memory at 800 with tighter timings and achieve almost the same performance as 1066, but the important thing first of all, is to get the machine stable. So my advice would be to lower the memory speed to 800 with the timings that you have, or loosen the timings at 1066 and get it running right. You may have to accept the fact that with 8 GB, you may not be able to have the memory run at the exact specs they advertise.
Good point Mellon head, sometimes relaxing the timings can help when running 8GB as does increasing the memory voltage a bit or running it slower than spec.

The limit for these chip sets is 1088Mhz when running 8GB although the 750i does not like to run anywhere near this number with 8GB of memory for some reason. You could do 1088Mhz on the 780i though but only if you used the right brand of memory. Of course using just 4GB might be easier in the long run.

Usually 800-1000MHz is about all you can get with the 750i when running 8GB. Either way the slight decrease in performance won't be noticable.
My System SpecsSystem Spec
14 Sep 2010   #30
Dave76

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 

Edit:
A lot of posts since I started this one, was distracted.

Good information, manually set the timings and voltage in BIOS, relax timings and/or bring down to 800MHz.
End/Edit


Look on the lower left side of your motherboard and tell us the rev. number, should be rev. 1.0, 1.0, 1.2 or 1.3.

I have found an issue with your motherboard, they couldn't get 4 double sided RAM cards to run without errors.
Are there chips on both sides of your RAM cards?

Your manual states the it will run with 4 DS RAM cards, this doesn't mean it won't cause issues.

What are the increments on the MCH Core voltage settings?
NB voltage should be changed in very small increments and it is advisable to take your time and find the lowest voltage setting that will run stable.

Let us no the above information it will help with any adjustments.

Another Edit:

SPD JEDEC#2 specs, from CPUZ, for 400 MHz (800MHz) are 5-5-5-18 and 1.8v, this might be a good place to start, if your going to 800MHz.

Can you give us the link to the Crashes and Debugging forum so we can see what's going on there, also a good idea to give them a link here.

You mentioned that you were going to run 2 RAM cards and check if it was stable.
Was it Stable with 2 RAM cards?

Might be a good idea to get it running stable on 2 RAM cards, then work on the 4 RAM cards.
My System SpecsSystem Spec
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 Bad RAM? Help Interpret Memtest86 (28,416 errors then 0 errors)




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