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

The specs are 9-9-9-24 timings at 1.5V. Is that how you have them configured?

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!

The box says 1.5~1.6 V. Just out of curiosity, why am I increasing the voltage?

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

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.

Auto is 8-8-8-20.

How do I set the 1066 MHz? Is it the SPD?

Here's the table: http://home.iitk.ac.in/~viveks/cpuz-spd.jpg

This is with one module of 1 GB only. Thats the only way I am able to run Windows without blue screens.

What next?

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

Is there some conclusive way of establishing that the problem lies with the memory slots on the motherboard and not the modules?

Yes, I did. They said they don't have the motherboard anymore, so they don't know what the settings should be...

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.

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?

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:

Here are the bios setting screens

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?

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)

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:

I flashed back to F7. not F4

couldn't edit my post.

Al the Pal

Any more inputs, anyone?

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.

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.