rdh_homehotmai Posted November 19, 2004 Share Posted November 19, 2004 Hiya, I have owned a pair of half-gig XMS3200C2PT chips for a while now, which have run happily at stock. I say at stock as I don't overclock. I had one stick fail on me back in March - which you kindly replaced pretty quickly but now I think the other one has gone west on me as well. Only recently I upgraded to a 3200 chip meaning I could (finally) run in sync @ DDR400. Or so I thought. It ran for a short time but I could tell it wasn't happy. Someone introduced me to CPU-Z as a good tool for taking snapshots of how your system is running. I discovered that one of the things CPU-Z displays is SPD timings. The stick I had replaced in March was a.o.k. but the older stick, while showing as the correct part number, showed that it was only rated @ 166Mhz?? Took the stick out and all was fine. So now, if I boot @ DDR400 set memory speed manually, it runs. (Only been running @ DDR400 for two sessions so far so fingers crossed!) If I set by SPD, it keeps falling over. Think I've got another faulty stick. What you reckon? Let me know. Cheers, Rob Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 19, 2004 Corsair Employees Share Posted November 19, 2004 Please make sure that you have the latest BIOS for your MB and load Setup/Optimized default settings, and try the following BIOS settings; TwinX1024 or TwinX512-3200C2 CPU Freq: 200 MHz (400 FSB) System Performance: User Define Memory Frequency: 100% Resulting Frequency: 200 MHz (400 FSB) Memory Timing: User Define SDRAM CAS Latency: 2.5T SDRAM RAS to CAS Delay (tRCD): 3T SDRAM Row Precharge (tRP): 3T SDRAM Active to Precharge Delay (tRAS): 6T DDR Reference Voltage: 2.7 Volts AGP Voltage: Default *unless you have ATI (9200 or 9600) or NVIDIA (5200 or 5700) then 1.6 Volts suggested!* All other settings are motherboards defaults Then please test them one at a time with http://www.memtest.org and let’s make sure it's not some other issue! I would run the test for at least 2-3 passes to be sure! Link to comment Share on other sites More sharing options...
rdh_homehotmai Posted November 21, 2004 Author Share Posted November 21, 2004 Latest mobo/bios already flashed. Have already run Memtest86 when started getting problems after you replaced the 1st stick; no reported errors after being on for approx 3 hours (not sure how many passes). However, will run again just to be certain and post back results. Re memory timings; can't select cas2.5 as an option - cas 2 or 3 only. Am I not right in saying the memory, when @ 200Mhz, is set up to run at 8-3-3 cas 3 anyway? Even so, given I can't select Cas 2.5, what timings should I be running please? Cheers :biggrin: Link to comment Share on other sites More sharing options...
Wired Posted November 22, 2004 Share Posted November 22, 2004 He stated the timings you are requested. Link to comment Share on other sites More sharing options...
rdh_homehotmai Posted November 22, 2004 Author Share Posted November 22, 2004 Re memory timings; can't select cas2.5 as an option - cas 2 or 3 only. given I can't select Cas 2.5, what timings should I be running please? Cheers :biggrin: Can't select cas 2.5 so need other timings? Link to comment Share on other sites More sharing options...
Wired Posted November 22, 2004 Share Posted November 22, 2004 Try CAS 3. Link to comment Share on other sites More sharing options...
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