dee-vee Posted November 10, 2005 Share Posted November 10, 2005 I have 3 sticks of 512mb xms pc3200c2 all 3 are different versions they are 3.2, 4.1, 5.2 I can get the 4.1 and 5.2 versions to run dual channel but the 3.2 stick will not work at all in dual channel. It also will not work when the other 2 sticks are in. I have ran memtest86 and I got no errors on this stick. I have tried putting the sticks in every combination I can think of but the max I can get working is 2 sticks. At first I thought it was my motherboard so I got a new one (same board) but the problem is still here. Any help? Link to comment Share on other sites More sharing options...
RJLeong65 Posted November 10, 2005 Share Posted November 10, 2005 I have 3 sticks of 512mb xms pc3200c2 all 3 are different versions they are 3.2, 4.1, 5.2 I can get the 4.1 and 5.2 versions to run dual channel but the 3.2 stick will not work at all in dual channel. It also will not work when the other 2 sticks are in. I have ran memtest86 and I got no errors on this stick. I have tried putting the sticks in every combination I can think of but the max I can get working is 2 sticks. At first I thought it was my motherboard so I got a new one (same board) but the problem is still here. Any help? Unfortunately, all of your sticks must be of the same revision in order to run dual-channel. In fact, they all must be of the same revision just to even run at all. That's the limitation on all modern memory controllers. Link to comment Share on other sites More sharing options...
dee-vee Posted November 12, 2005 Author Share Posted November 12, 2005 Uh, you are saying any modern mobo has to have all the exact same ram even if its not in dual channel? This would be impossible lol. Link to comment Share on other sites More sharing options...
Wired Posted November 12, 2005 Share Posted November 12, 2005 Far from impossible. To clarify one thing though, it's possible to get unmatched sticks to work together, even when they're using the same ICs, however it's highly unlikely that they'll run @ rated specs. Link to comment Share on other sites More sharing options...
dee-vee Posted November 13, 2005 Author Share Posted November 13, 2005 So anytime you want to add more ram to your system you have to throw away all your old ram just so you can get new ram thats exactly the same? Link to comment Share on other sites More sharing options...
CandyKid Posted November 13, 2005 Share Posted November 13, 2005 Err... not exactly. Anytime you add non-matched memory to an existing system, you increase the chances that... 1) The modules will not run at their rated specifications (I.E. you'll need to relax the latencies). 2) The modules will toss errors that are not due to defective modules, but due to incompatibility with each other. 3) The modules will not run in dual-channel (there's such a thing as virtual single-channel mode when using a dual-channel capable mainboard). 4) With more modules comes more 'loading' and you may end up with a 2T command rate, putting a rather severe dent in your bandwidth. Some systems are more susceptable to these issues than others. Most Athlon 64 systems have more stringent memory restrictions and don't fare well with mixed modules, just for an example. PLUR CK Link to comment Share on other sites More sharing options...
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