nd22 Posted January 17, 2008 Share Posted January 17, 2008 I have my current pc for about 7 or 8 months and functioned flawlessly until I have decided to put some more ram and a new video card to boost its capabilities. So I have bought a pair of Corsair TWIN2X2048-6400C4. I already have a pair of these and both are revision 2.1. The system boots fine and win starts up but if I disabled quick boot in bios or put memetest cd in drive to test the memory the system resets respectively freezes!! In bios at UGuru all settings are the default ones: 1.CPU operating speed - default; memory is set do ddr2-800 2.voltages control - auto; memory voltage is 1.90V and mch & pcie is 1.50V I have read the forum and I have increased the memory voltage to 2.10V but still freezes in memtest (on the memory itself 2.1v is written)!! 3.SPD timings are set to auto. With the old sticks was 4-4-4-12-auto. Should I remove the old sticks and leave just the new ones and see if the pc continues to freeze with memtest? Should I raise the mch voltage?? But if I do so shouldn't the videocard voltage increase also (could I burn my current GPU by doing this)? Sorry if this is a simple matter but it seems I can't handle it by myself. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 17, 2008 Corsair Employees Share Posted January 17, 2008 What version of memtest are you using? Should be http://www.memtest.org Ver 1.70? And have you tried to test the modules one at a time? Link to comment Share on other sites More sharing options...
nd22 Posted January 17, 2008 Author Share Posted January 17, 2008 I am using memtest 1.60+. I have just removed the old modules and left the new ones. First boot: voltage control auto -1.90V, MCH - 1.50V, timings by SPD; quick boot disabled Result: the memory passed all the tests (i did not have time for memtest) and win loaded normally. I have tried battlefield 2: eats 1.6gb of ram and played normally, no errors. Second boot: the same as above but timings set to 4-4-4-12-auto(trfc) Result: all tests passed. BF2 played without errors. Should I use memtest 1.70+? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 17, 2008 Corsair Employees Share Posted January 17, 2008 Yes that might be why you are getting error with the older version of memtest. But if its stable in windows playing games you should be good to go. Link to comment Share on other sites More sharing options...
nd22 Posted January 17, 2008 Author Share Posted January 17, 2008 I have just finished 2 passes of memtest 1.70 without errors with the new modules! Also if I put the third one the system passes all POST tests with no errors. I borrowed for tonight a saphire x1950xtx and played crysis with 3 modules (the new ones and one of the old ones): played absolutely perfect and comsumed 2.8gb of ram (other programs were also running). But all hell is breaking loose :mad: when I put the last module (I even switched them in different memory banks)! POST resets the computer and memtest 1.70 gives a lot of errors. In bios I raised the memory voltage to 2.10V, I left everything else untouched. Am I missing something here?? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 17, 2008 Corsair Employees Share Posted January 17, 2008 Try setting the memory frequency at DDR667 and set the memory Voltage to 2.1 Volts and set the NB/MCH Voltage to +.05 Volts. Link to comment Share on other sites More sharing options...
DrMunkey Posted January 17, 2008 Share Posted January 17, 2008 Seems like you were running into much the same problems I was, but I have an EVGA board. I could POST, but I couldn't get into Windows without a BSOD, after some fantastic help here, changing some voltages, the ssytem is now running solidly with all 4 1GB sticks of 6400C4 at the proper timings. Thanks to Ram guy and yoxxy! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 18, 2008 Corsair Employees Share Posted January 18, 2008 NP thanks for stepping in! Link to comment Share on other sites More sharing options...
nd22 Posted January 19, 2008 Author Share Posted January 19, 2008 I have done some extensive testing all day and finally I managed to get the system working!!! I gradually raised the voltages and changed memory frequency and tested with memtest! The system is stable with 2 passes in memtest (over 2 hours!!) with no errors at this bios settings: MEM - 2.20V MCH - 1.57V Every time I set the mem voltage to 2.10V (there is no 2.15V setting!!) memtest crashes the pc. UGuru voltage shown right now are: DDR2 - 2.22V; MCH - 1,58V. The memory runs fine at ddr2-800. I know this is outside specifications so my question is: will the memory burn because of the extra-voltage? I tried to lower the frequency first but with no luck! Am I good to go or I must lower back the 2.10V? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 19, 2008 Corsair Employees Share Posted January 19, 2008 Glad to hear you got it all running at 800MHz, just make sure you have good cooling on the NB and memory! Link to comment Share on other sites More sharing options...
nd22 Posted January 20, 2008 Author Share Posted January 20, 2008 In my case (Antec Atlas) I have 1x120mm rear fan + 2x92mm front fan. I think this ensures a good airflow. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 22, 2008 Corsair Employees Share Posted January 22, 2008 If your MB does not have a fan on the NB I would add one or one for the memory. Link to comment Share on other sites More sharing options...
nd22 Posted January 22, 2008 Author Share Posted January 22, 2008 OK, I'll do that! I noticed that the memory tends to get pretty warm during gaming sessions (warmer than my finger :biggrin: ).Thank you very much for your help Ram Guy! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 22, 2008 Corsair Employees Share Posted January 22, 2008 Thats not uncommon memory can run hotter than you can touch it and still be stable. But adding a memory fan will help that. Link to comment Share on other sites More sharing options...
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