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Corsair Dominator CM2X1024-8500C5D x2 Problem


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Mainboard: eVGA nFORCE 680i SLI 122-CK-NF68-TI

Memory: Corsair TWIN2X2048-8500C5D G



If i run both Sticks of memory in SLI mode my video card will get all weird in Windows Vista. little bubble will pop up saying that the video controller has stopped working. and has recovered. Also i get this problem when im playing games any game of any type... no matter how hardware intense, once i get the error it will continue to happen about every 2 minutes until i reboot, when i reboot the bios hangs on a C1 error. no matter the positions of the memory sticks the problem wont fix its self until i take one stick out. i have run memtest+ 1.70 on both sticks over night and neither have failed.... each single stick for for about 6 hours. with no errors.



If one stick of ram is in the computer runs fine. i can play any game for as long as i want and i never lose control of my video card.



Anyone have any ideas on what my problem can be?


I have installed a fresh copy of Vista with ALL current drivers and Updated BIOS..

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FSB and Memory Config

SLI-Ready Memory = CPUOC 0%

SLi-Ready Memory = Enable

FSB - Memory Clock Mode = Linked


Memory Timing Section


Memory Timing Setting = Expert

tCL (CAS Latency) = 5

tRCD = 5

tRP = 5

tRAS = 12

Command Per Clock = 2T

tRRD = Auto

tRC = Auto

tWR = Auto

tWTR = Auto

tREF = Auto



DDR2 Voltage = 2.2v


Edit: Can you set to these values? Memtest and Use OCCT Perestroika for a quick, hard and fast CPU stability test. Download Here

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I think i have fixed the issue.


After doing more research on this Forum i found out that my ram is supposed to run at 2.2 volts... and the bios was auto setting my voltage to 1.85..... i changed the voltage and set the SLI setting to CPU 0% and it appears to be running stable.

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  • 2 weeks later...
Great! Let us know if you have any more issues.


Computer worked fine for a week but now its starting to act up again. i keep getting the "Display driver nvlddmkm stopped responding and has successfully recovered." error. i hate spending alot of money on updrages and not having them work :(:.. i get this error like every 10 seconds now. and it only happens when i have both sticks of ram in.


I tried the settings listed above but TRAS 12 locks my computer up so i run it at the default 15.


I have looked online and it seems alot of people are having this issue just there is no solution. i dunno what to do.

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The 680i has it's share of issues with high DRAM speeds. You may wish to drop the bandwidth to 800Mhz and set the timings to 4-4-4-12 with 2.1v and see if the issues stop. These are the changes I would make.


SLI-Ready Memory = Disable

CPU Freq. MHz = 266

CPU Muliplier = 9

x FSB - Memory Clock Mode = Unlinked

x FSB Memory Ratio = Auto

x FSB (QDR), MHz = 1066

X MEM (DDR), MHz = 800


Memory Timing Setting


CL Cas Latency = 4

tRCD = 4

tRP = 4

tRAS = 12

Command Per Clock (CMD) = 2T



Memory = 2.1v

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Was this a clean install of Windows? Also, if you had several crashes due the low memory voltage, you could have some corruption. You may want to format and do a clean install of Windows with the latest drivers.


Yes. this is a clean install of windows, although im not sure if i remember having the same problems in Windows XP Pro or not.. so i guess my next question is if it the 680i chipset what brand moboard does everyone recomend that will work the best with high speed memory... or is it just eVGA that is having the problem? its rather disapointing spending almost 300 bucks on ram and not being able to use it at its full potential.


I did turn down the ram speed to 800mhz like suggested above by Derek and turned off the SLi, i havent had any problems yet... but like i said there is no point to having this speed of ram if the motherboard/chipsets cant handle it.



Is there any moboard company out there that works with Corsair that has the best support for corsair memory? and if so what company is it please. :)

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i formated and reinstalled Windows XP and i havent had any problems. when i was running vista my video card would crash every 10 seconds. but now im running smooth. no crashing no random lock ups. nada. vista was released to early and its still way to buggy to be worth upgrading to. :) thats my solution and im sticking to it. Thanks for all the help and sugesstions that everyone gave. i appreciate the help :)
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Well.. im back again. i had the same problem in Windows XP but it was less forgiving, instead of the driver failing the OS locked up and started doing all sorts of weird things. so im now running the memory with



SLI off

in Linked mode.

1:1 ratio mode

1067 FSB and Mem

and voltage at 2.1


and i seem to be stable.


for now....



So back to my other question about what boards seem to have better support for Corsair and high speed memory? The eVGA tech i spoke to tonight insisted that it was a memory problem and that the built in controller on the chips wasnt giving the BIOS the right information which is why im having the C1 C3 1D errors on my onboard LCD...


I went through this pointing fingers game about 2 months ago where corsair tech said that if the mem passed mem test then it was the moboard but evga insisted that it was the memory because the board is posting... and its getting hung up on the memory.. so im not sure where im standing here, i have tried all the suggested settings and nothing seems to work.




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Intel chipsets for Intel CPU's are a good way to go. At the moment I find the P35 chipset to be the most mature and robust chipset for Intel Core 2 processors. I like the P5K-E for its 8 phase power and low RMA returns from NCIX. 680i returns are FAR higher. This is not opinion, this is FACT! No matter what EVGA says. The C1 issue is all over the net. Google EVGA 680i and C1 and you will see that the issues are on all DRAM manufacturers sites and 680i sites.




Now add any memory company to the search and you will find it across the board. So either all high end DRAM is at issue or the chipset is at issue.


However, you must keep in mind that when you purchase DRAM that is above the specifications of JEDEC, you can find issues. For example, the JEDEC highest standard for DDR2 is 800Mhz at 5-5-5-18 with 1.8v. Much of the high end DRAM 8500C5, etc. have voltage requirements that are far in excess of the JEDEC standards and this can bring issues for the non tech savvy user. For these people, I advise lowering their DRAM to allow for JEDEC. Many times users will have a power outage and lose their CMOS settings. When this happens, the system defaults back to 1.8v and the DRAM that needs more voltage will not start. One has to insert a stick of 1.8v DRAM and restart the system, enter the CMOS Setup Utility and set to the necessary DRAM voltage requirements of the high end DRAM.


It's not Corsair support per se, it is any high end DRAM that requires more voltage than the stock settings allow for. As well, with the higher end DRAM (and this pertains especially to Micron) it seems to be rather finicky with some boards and of which the 680i is in that group.


I always set the 680i with high end Micron dram to tight timings and lower bandwidth. ie. 800MHz 4-4-4-10 and 2.2v rather than 1066 with 5-5-5-15 and 2.2v. It seems to work better but there are still the C1 issues.


For comparisions ie.


6400C4 DRAM that defaults to 6400 at 5-5-5-18 with 1.8v and can be taken to ~1000Mhz with 5-5-5-15 and 2.1v vs. 8500C5 that does NOT default to JEDEC and can be taken to ~1100+Mhz with 5-5-5-12 at ~2.3v but needs a more tech savvy user.


In the enthusiast arena, those who are not tech savvy, either become savvy or move downwards and find a more plug and play stability.


There are those who want both and this is not at this time very foreseeable.

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