buttsmear15 Posted January 7, 2005 Share Posted January 7, 2005 I been having system instability for a while now at 200MHz FSB on an Abit NF7-S Rev. 2.0 with two sticks of Corsair CMX256A-3200C2 XMS3202v1.2. I then turned my FSB down to 186MHz, the fastest It would run stable. Anything above that and I would get errors in Memtest86. I removed one of the sticks while running at 200MHz FSB and found that one of the sticks is unstable at that speed. Increasing the memory voltage does nothing. These tests were performed with the processor underclocked. These are my BIOS settings: CPU Freq: 200 MHz (400 FSB) System Performance: User Define Memory Frequency: 100%/1:1 ratio Resulting Frequency: 400 MHz (400 FSB) Memory Timing: User Define/Manual SDRAM CAS Latency: 2.5T SDRAM RAS to CAS Delay (tRCD): 3T SDRAM Active to Precharge Delay (tRAS): 7T SDRAM Row Precharge (tRP): 3T DDR Reference Voltage: 2.7 Volts Chipset Voltage: 1.7 Volts Thanks Link to comment Share on other sites More sharing options...
Wired Posted January 7, 2005 Share Posted January 7, 2005 what a ****ty name... :) What motherboard / CPU / FSB do you have? Link to comment Share on other sites More sharing options...
buttsmear15 Posted January 7, 2005 Author Share Posted January 7, 2005 Heh, Thanks Abit NF7-S Rev. 2.0 2600+ Mobile FSB Stable at 186MHz but unstable at 200MHz Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 7, 2005 Corsair Employees Share Posted January 7, 2005 I would suspect that the CPU is just topping out, you might try and set the Multiplier to 9 or 10 and test the module again if the results change that would suggest its the CPU! Link to comment Share on other sites More sharing options...
buttsmear15 Posted January 7, 2005 Author Share Posted January 7, 2005 My CPU during the memtest86 tests was at 10x200@1.65v and 10*186@1.65v, both easily done by my processor. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 7, 2005 Corsair Employees Share Posted January 7, 2005 Let me put it another way, if you have a bad module it will fail at the same place on test 4 no matter what frequency you have it at. So the fact the module will pass at 186 MHz suggest its might be the CPU. I would test the modules with these settings 2 or 3 pass and see if the modules pass one up. CPU Freq: 166 MHz Memory Frequency: 100% Dim Voltage to 2.7 Volts Resulting Frequency: 166MHz SDRAM CAS Latency: 2.5T SDRAM RAS to CAS Delay (tRCD): 3T SDRAM Row Precharge (tRP): 3T SDRAM Active to Precharge Delay (tRAS): 6T Link to comment Share on other sites More sharing options...
buttsmear15 Posted January 8, 2005 Author Share Posted January 8, 2005 I tried it in another system too. Same thing. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted January 10, 2005 Corsair Employees Share Posted January 10, 2005 Please follow the link in my signature “I think I have a bad part!” and we will be happy to replace them or it! Link to comment Share on other sites More sharing options...
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