darknet Posted January 21, 2007 Share Posted January 21, 2007 Recently I had s system put together with an Intel DX975XBX2 motherboard, a 2.93 Mhz (X6800) Core 2 processor, and a pair of 1 Gig sticks (4-4-4-12 800 Mhz XMS2-6400). The first pair of sticks resulted in the system not-posting (just beeps). The 2nd pair of sticks seemed OK, but after a few weeks of having a few disconcerting problems (memory corruption) I decided to grab the memtest 86+ ISO and see if it detected any problems. Once started, it showed a few bit errors every few seconds. I re-seated the sticks, but had the same result. I thought to look in BIOS to see if anything was amiss: the default memory settings were 5-5-5-18 1.84v. Before I return the sticks for a third set, have anyone out there have a similar setup working, or suggest something that I could try? Unfortunately, the Corsair memory configuration does not have my specific motherboard in their list. The XBX did not support 800Mhz memory, but the XBX2 does. Link to comment Share on other sites More sharing options...
DerekT Posted January 21, 2007 Share Posted January 21, 2007 I would enter the BIOS and set your Memory Voltage (Vdimm) to 2.1v. Disable the USB legacy mode (if you have such a setting) and retest. Intel Boards are often problematic with DRAM that is higher than SPec voltages and most high end DRAM is SPec'd for higher than the JEDEC voltage standards. Intel Spec Addendum Rev 1.1 for the JEDEC DDR2 667/800 Specification in Adobe Acrobat* format. Intel Spec Addendum Rev 1.0 for the JEDEC DDR2 400/533 Specification in Adobe Acrobat* format. Thus you usually need to increase the voltages of this DRAM. Link to comment Share on other sites More sharing options...
darknet Posted January 23, 2007 Author Share Posted January 23, 2007 Having a look around the Corsair site and not being able to find any information about the voltage spec for Corsair's memory (I did notice that Intel expects the DRAM used to operate within the 1.7 to 1.9 voltage range), I went ahead and tried a third pair of sticks. Ran memtest for 10 hours last night without a single bit error. I guess I was just unlucky enough to get 2 bad pairs. Link to comment Share on other sites More sharing options...
Legend Posted January 23, 2007 Share Posted January 23, 2007 I would only run the 6400C4 part at 2.1v. Link to comment Share on other sites More sharing options...
Yoxxy Posted January 23, 2007 Share Posted January 23, 2007 JEDEC standards are just that standards. Corsair memory performs above the standard in almost all situations so this is why you must add more voltage. 2.1v (warrantied for life) is a safe bet on these dimms to get accurate timings and SPD. Intel also would have not have made a board (Foxconn made it I know), that goes to 2.80v vDimm if there was a not a market for it. Set your vDimm to 2.1v and also change the timings. If you do not know how to do this and need help please let me know. Thanks. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.