engine Posted October 7, 2007 Share Posted October 7, 2007 Hi. I have a set of TwinX1024-3200XLPRO that will only do cas 2. Cas 2.5 or cas 3 will give memtest errors. Sometimes cas 2.5 will pass memtest but will BSOD in windows. Is this behaviour normal for this ram? TWINX1024-3200XLPRO LOT# 0512061-3 XMS3208v1.2 written in the sticks. Regards. Link to comment Share on other sites More sharing options...
engine Posted October 7, 2007 Author Share Posted October 7, 2007 Forgot to tell this is at 200 MHz 2.75 V. And doesn´t matter if it is at 2.8 V or 2.9 V. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 8, 2007 Corsair Employees Share Posted October 8, 2007 Can you please tell me the bios settings you have set for both CPU and memory and any performance settings that you may have set? Link to comment Share on other sites More sharing options...
engine Posted October 8, 2007 Author Share Posted October 8, 2007 BIOS is the latest available for this motherboard. ABIT AN7 BIOS version 19. I always use these settings. CPU Interface -> Enabled FSB -> 200 MHz CPU FSB/DRAM ratio -> AUTO (Sandra says 6:6, Everest says 1:1) Command Rate is set to 1T by the BIOS and there isn´t any option available to change this. There is a modded BIOS that will do 2T but doesn´t make a difference. The modules are at DIMMs 2 and 3. This makes dual channel. I also tried each module on each DIMM alone and still errors on memtest86+ at CAS 2.5 and CAS 3. There isn´t a 2.75 V option available. There is 2.7 V; 2.8 V and 2.9 V. I set to 2.7 V. The motherboard DDRVDD sensor shows 2.75 V in Everest and 2.77 V in SpeedFan. PS: I don´t know if these options make a difference: CPU Disconnect Function -> Enabled FSB Spread Spectrum -> Disabled CPU Thermal-Throttling -> Disabled CPU is an Athlon XP T-Bred B 2400+ FSB default is 133 MHz. Been running at 200 MHz FSB 10x multi default voltage for at least 2 years. RAM runs fine at default timings. The problem is running at superior CAS value. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 8, 2007 Corsair Employees Share Posted October 8, 2007 I would recommend lowering your CPU to the default settings and retesting, to see if it is the memory or the CPU that is not allowing you to be stable at higher latency. Link to comment Share on other sites More sharing options...
engine Posted October 8, 2007 Author Share Posted October 8, 2007 I will try as you suggest. I will try 133 MHz FSB sync and 133 MHz FSB 200 MHz memory. Will post results tomorrow. Anyway, I have a pair of 256 MB (each) TwinMOS memory that runs at 2.5-3-3-8-1T 400 MHz DDR default stable in dual channel mode. And has no problems running at more relaxed timings with same Motherboard and CPU. I will check that again to make sure. Regards. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 9, 2007 Corsair Employees Share Posted October 9, 2007 Let me know how it turns out! Link to comment Share on other sites More sharing options...
engine Posted October 9, 2007 Author Share Posted October 9, 2007 Tried CPU default settings FSB 133 MHz, CPU FSB/DRAM Ratio AUTO that will make RAM at 133 MHz as well. Than changed RAM timings to 3-4-4-8. That will make BSOD at Windows load again and again. Than I tried 2.5-3-3-8 and Windows won´t even start loading. With CPU FSB at 133 MHz and CPU FSB/DRAM Ratio set to SPD, that will make RAM at 200 MHz and CPU at 133 MHz async. Again CAS 2.5 or CAS 3 will imediatly BSOD into Windows. They will run at CAS 2. At 2.9 V they pass memtest at 233 MHz sync 2-3-3-7-2T dual channel, and will run Windows without problems. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 9, 2007 Corsair Employees Share Posted October 9, 2007 I would test them in a system that supports DDR400 to be sure but it sounds like there is some issue with the MB and or BIOS. Link to comment Share on other sites More sharing options...
engine Posted October 10, 2007 Author Share Posted October 10, 2007 Abit says it supports DDR 400: The nForce™2 Ultra 400-based AN7 is packed with features that deliver mind-bending performance. With a 400MHz FSB, Dual DDR400 support, NVIDIA SoundStorm™, and exclusive ABIT μGuru™ technology, the AN7 is the definitive AMD Athlon™ platform for the hardware enthusiast. Anyway when time is available I will try other RAM its rated DDR400 at 2.5-3-3-8 Regards. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 10, 2007 Corsair Employees Share Posted October 10, 2007 You might try a different BIOS and see if anything changes, or try running the modules on a different system at cas 2.5 and see if the same thing happens. Link to comment Share on other sites More sharing options...
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