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Gigabyte EX58 Extreme with G Skill F3-1066CL9T-3GBNQ

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December 4, 2009 4:36:45 PM

Hi,

I am using a 3 GB DDR3 (3x1GB) G Skill memory kit (F3-10666CL9T-3GBNQ) [http://www.gskill.com/products.php?index=200]. I frequently encounter blue screens in Windows 7 and memory errors in both Windows 7 and Fedora Linux.

Memtest version 4 reports an error when all 3 memory modules are installed. However, each of the 3 memory modules when placed individually, in each of the 3 slots passes the test (in all 9 different permutations).

Do specific voltage or other settings have to be changed in the BIOS? My academic work is strongly dependent on this system, and is suffering immensely as a result of the frequent memory problems.

I would really appreciate some help and advice. I can't find mention of the instructions for configuring the bios for this particular memory and board combination on the G Skill forums (http://gskill.us/forum/forumdisplay.php?f=35).

I have also tried the Corsair CM3X1024-1333C9 memory (3 GB kit), which posed similar issues.

Thanks!
Vivek
a c 80 } Memory
a c 229 V Motherboard
December 4, 2009 5:59:45 PM

The specs are 9-9-9-24 timings at 1.5V. Is that how you have them configured?
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December 4, 2009 6:14:45 PM

Do you mean:

CAS Latency Time = 9
tRCD = 9
tRP = 9
tRAS = 24

for Channel A, B and C?

and

Profile DDR Voltage = 1.5 V
Profile QPI Voltage - 1.15 V

?
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December 4, 2009 6:37:10 PM

Hi GhislainG. Thanks for your reply. I have changed the settings as follows

Channel A

CAS Latency Time = 9
tRCD = 9
tRP = 9
tRAS = 24
Command Rate (CMD) = 1


Channel B

CAS Latency Time = 9
tRCD = 9
tRP = 9
tRAS = 24
Command Rate (CMD) = 1


Channel C

CAS Latency Time = 9
tRCD = 9
tRP = 9
tRAS = 24
Command Rate (CMD) = 1


With these settings, all the initial errors, all the hundred or so initial errors in Memtest disappear. However, by the time Memtest gets to test 7, around 42 errors show up.

I want to emphasize that I have successfully tested each of these modules separately. And these modules were shipped to me just a few hours ago. I ordered them because of similar problems with the Corsair modules, as I stated in my first post.

I think some more changes have to be made to the BIOS. Can you please suggest what I should do next. Thanks for your help!

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a c 80 } Memory
a c 229 V Motherboard
December 4, 2009 8:10:48 PM

Increase the DDR voltage a bit, but don't exceed 1.65V. Running a single module always is easier.
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December 4, 2009 8:36:29 PM

The box says 1.5~1.6 V. Just out of curiosity, why am I increasing the voltage?
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a c 80 } Memory
a c 229 V Motherboard
December 4, 2009 8:38:34 PM

To get the modules stable. 1.5V is the minimum and it's fine for a single module, but additional voltage often is required when running several modules.
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December 5, 2009 2:15:12 AM

I've cranked the voltage up to 1.6 V. I still get errors in the random number sequence test in Memtest.

What about the advanced timing settings? The defaults are

tRC = 27
tRRD = 4
tWTR = 4
tWR = 8
tRFC = 60
tRTP = 4
tFAW = 16
Command Rate = 1

Round Trip Latency = 55
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a c 80 } Memory
a c 229 V Motherboard
December 5, 2009 12:00:47 PM

I wouldn't bother with those settings. Try running the memory at 1066 MHz to see if it's stable (9-9-9-24 timings at 1.5V).
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December 5, 2009 1:49:21 PM

I did run Memtest at 9-9-9-24 and 1.5V with all 3 modules in place. It returned errors as I pointed out above.

Do I have to change the BCLK (Base Clock control) also? Memtest shows DDR3-1079 as the setting, even though everything in the bios is set to auto.

What do you mean by "running the memory"? Do you suggest I should ignore Memtest and go into Windows? I did that as well...a blue screen pops up soon after bootup.

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a c 80 } Memory
a c 229 V Motherboard
December 5, 2009 3:27:52 PM

Quote:
I did run Memtest at 9-9-9-24 and 1.5V with all 3 modules in place. It returned errors as I pointed out above.
If Auto settings is 9-9-9-24 timings, 1.5V and 1066 MHz, then contact G.Skill for optimal settings. Your motherboard is on the list, therefore it should work properly.
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December 5, 2009 3:47:00 PM

Auto is 8-8-8-20.

How do I set the 1066 MHz? Is it the SPD?
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a c 80 } Memory
a c 229 V Motherboard
December 5, 2009 3:51:55 PM

What's in the SPD table for 1066 MHz (533 MHz in the table)? You can use CPU-Z to view that info.
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a c 80 } Memory
a c 229 V Motherboard
December 5, 2009 6:36:38 PM

Try the JEDEC #2 settings (including tRC at 30) and the frequency to 1066 MHz (533 MHz). If that doesn't work (and you also had issues with another set of modules), then it's time to look into possible CPU, motherboard or power supply issues. What PSU do you have?
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December 6, 2009 4:00:41 AM

CPU = Core i7 920
M/B = Gigabyte EX58 Extreme
PSU = Realpower 700 W Modular SMPS

Shouldn't I be trying the JEDEC #3 settings? Those are 9-9-9-24
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a c 80 } Memory
a c 229 V Motherboard
December 6, 2009 12:20:08 PM

You previously indicated that you had failures at JEDEC #3 settings, but why not try them again.
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December 6, 2009 7:17:03 PM

Is there some conclusive way of establishing that the problem lies with the memory slots on the motherboard and not the modules?
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a c 80 } Memory
a c 229 V Motherboard
December 7, 2009 11:59:18 PM

It probably isn't the memory slots. Did you contact G.Skill? They should know what settings were used when they tested that motherboard. Since you also had similar issues with Corsair modules, I would suspect the motherboard, the PSU or the CPU (which also is the memory controller). It's tough to solve problems without spare parts.
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December 17, 2009 10:27:08 AM

Yes, I did. They said they don't have the motherboard anymore, so they don't know what the settings should be...
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a c 80 } Memory
a c 229 V Motherboard
December 17, 2009 11:20:23 AM

Then that doesn't leave you with too many options. Since you have a single system, you'll have to RMA parts until you figure out what the issue is. You could also visit http://forums.tweaktown.com/ because someone else having that motherboard might have run into similar issues.
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December 27, 2009 3:50:28 AM

Hi, Gigabyte India came to my rescue and sent me another motherboard, which I have installed with the G.Skill memory. The problems are persisting. What course of action would you suggest? How do I qualify my CPU and PSU? Is there anything else that could be going wrong?

I can't find ALL the bios timing settings for this memory...strangely enough. By the way, G.Skill advised the command rate to be set to 2 instead of Auto (which sets it to 1).

Is it possible that all the other settings, e.g. tRC, are also getting set incorrectly by Auto? Isn't Auto supposed to handshake with the memory and read the settings by default? If so, the timing would have been set to 9-9-9-24-2N instead of 8-8-8-20-1N which is what happens.

Also, now I can't boot into Windows...startup repair begins, with a BAD_POOL_HEADER bluescreen.

:( 
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a c 80 } Memory
a c 229 V Motherboard
December 27, 2009 9:09:46 PM

About the BAD_POOL_HEADER bluescreen, are you running Windows XP? If so, I found a post that suggested to remove and reinstall KB908531. Can you at least boot into Safe Mode?

The only way to verify that a part works fine is to test it in another system. It's tough to fix issues like that without spare parts or another system to test them in.
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December 28, 2009 1:37:32 AM

I'm running Windows 7, and the blue screen I get doesn't always have BAD_POOL_HEADER but most often when I boot into "Normal" mode, thats what I do get.

Well, what other parts can I suspect and try to have replaced now? The CPU and PSU? Nothing else right?
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December 28, 2009 1:59:10 AM

Also, with the new motherboard, latest bios (F9P) and all 3 memory modules in place, with 1.6 V as the DRAM voltage, I get the following error message from the bios every time I try to set the voltage as 1.6 V and the latencies manually as 9-9-9-24-2:

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a c 80 } Memory
a c 229 V Motherboard
December 28, 2009 2:13:41 AM

What's the Windows error code?

Increase the QPI/Vtt voltage and the DRAM voltage as shown here: http://forum.corsair.com/v3/showthread.php?t=76751 Revert to the previous settings if it doesn't help.

You could also try to set the Command Rate to 2 instead of 1.

Edit: You need to get the system stable. At a minimum, Memtest86 shouldn't fail.
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December 28, 2009 2:45:32 AM

Here are the bios setting screens





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December 28, 2009 2:49:57 AM

GhislainG said:
Increase the QPI/Vtt voltage and the DRAM voltage as shown here: http://forum.corsair.com/v3/showthread.php?t=76751 Revert to the previous settings if it doesn't help.

You could also try to set the Command Rate to 2 instead of 1.


Isn't that for Corsair? Anyway I did set 9-9-9-24 and a command rate of 2. Please see the bios screens posted above, and advise as to what the settings should be, if entered manually.
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a c 80 } Memory
a c 229 V Motherboard
December 28, 2009 3:00:19 AM

It doesn't matter if they're for Corsair. Increase the QPI/Vtt voltage to 1.255V and run Memtest86. If it doesn't help, then increase the DRAM voltage to 1.65V. If having those settings along with a Command Rate of 2 doesn't work, then I would have the CPU checked. After all that's where the memory controller is.

Do you have a link to your PSU?
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December 28, 2009 3:06:56 AM

Also, do you think it'll be okay to increase the DRAM voltage by 0.05V beyond the maximum value of 1.6V listed on the memory module? I know that the voltages fluctuate anyway, so 0.05 V should not be a big deal in general, but I'm just a bit concerned about damaging the memory. Should I do it anyway?

PS -- Which of the three images (from top) do I follow on the link you gave me a while back? (http://forum.corsair.com/v3/showthread.php?t=76751). I am guessing the first one which is listed under core i7 940? (I have an i7 920)
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December 28, 2009 3:40:06 AM

The QPI/Vtt voltage settings possible in my BIOS are:

1.120 V
1.150 V (Set by Auto, right now)
1.160 V
1.180 V
1.200 V
1.220 V
1.240 V
1.260 V
1.280 V
1.300 V
1.320 V
1.340 V
1.360 V
1.380 V
....

Which one should I pick?
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December 28, 2009 7:17:26 AM

Something really crazy is happening now. When I boot the system with ONE memory module (1GB) into Windows and run the Intel Processor Identification utility, it tells me that the CPU is overclocked!

Here's the screenshot:

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December 28, 2009 10:07:41 AM

Hello ,

I see you use the F9P bios.

I tried that bios last week and had a few memory issues in Windows 7 x64.

only 2Gb out of 6Gb showing in windows.
memory timings in bios completly random. and so on

I flashed back to F4 and all is good again.

Mayby you should try that too ?


Regards Al the Pal
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December 28, 2009 10:15:08 AM

I flashed back to F7. not F4

couldn't edit my post.

Al the Pal
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December 28, 2009 12:39:13 PM

Hi Al, thanks for the input. Incidentally, Gigabyte emailed me a few hours ago, asking me to downgrade from F9P to F5, which is what I just did. But that hasn't helped...I still get memory errors in Memtest v4 (Test #7) and blue screens on booting Windows.
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December 29, 2009 12:16:19 PM

Any more inputs, anyone?
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a c 80 } Memory
a c 229 V Motherboard
December 29, 2009 1:18:55 PM

darkmav said:
The QPI/Vtt voltage settings possible in my BIOS are:

1.120 V
1.150 V (Set by Auto, right now)
1.160 V
1.180 V
1.200 V
1.220 V
1.240 V
1.260 V
1.280 V
1.300 V
1.320 V
1.340 V
1.360 V
1.380 V
....

Which one should I pick?

Try 1.220.
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December 29, 2009 2:15:11 PM

I tried a QPI/Vtt voltage of 1.220 V and a DRAM Voltage of 1.640 V, which failed. Then I cranked up the QPI/Vtt voltage to 1.240 V, 1.260 V and 1.280 V. All attempts were in vain.
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a c 80 } Memory
a c 229 V Motherboard
December 29, 2009 6:08:13 PM

Then go back to the default values. At this point I would probably RMA the CPU because it also is the memory controller, but this is a wild guess. Did you buy the components on-line or at local shop? If local, you should have them take care of the issue.
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January 20, 2010 9:56:19 AM

I'm getting the CPU replaced along with the memory modules. But I have a choice of getting either two 3GB kits of the 1333 MHz memory

Corsair TR3X3G 1333C9

or the 6 GB kit of 1600 Mhz frequency, which is

Corsair TR3X6G 1600C8D

both of which are supported by the Gigabyte EX58 Extreme.

Which one should I pick? The attraction in choosing the second option is that it will consume 3 out of the 6 slots whereas the first one will consume all 6 slots.

The question is: is it meaningful to use 1600 MHz memory with the Core i7 920 CPU? Without overclocking, will I really see a faster throughput?

PS -- I'm eagerly awaiting a response...I have to tell the dealer to send the memory+CPU combo asap.
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January 29, 2010 11:06:34 AM

Thanks everyone, esp ghislain!

My system is working perfectly now. I got my CPU, M/B and Memory replaced. The problem was with the CPU and a memory slot in the original Gigabyte motherboard.
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!