Aquilan Posted March 4, 2005 Share Posted March 4, 2005 Motherboard: Intel D875PBZ (upgraded firmware to latest P33) Memory: Corsair TwinX1024-3200C2PT With my matched set of Corsair memory fitted I cannot get the system to set them up in dual mode, only single mode, and yet I specifically purchased a matched pair to ensure I could do so. The two 512MB modules are fitted to Slot 0 & 1 of Memory Channel A on my Motherboard. Upon initially entering the POST after fitting the memory modules the Motherboard automatically detected and set the latency as 3.0-3-3-8 even though the modules are supposed to be rated to 2.0-3-3-6. Whether left at this rating or manually set to 2.0-3-3-6 or even 2.5-3-3-6 (as is recommended for these devices) the system functions fine without any crashes but the POST still reports that the memory is configured for Single Channel Dynamic Paging Mode and the option to adjust the mode is greyed out in the firmware configuration menu (which I assume is because the Motherboard has determined that the two devices are not matched closely enough to operate in dual mode). Can I assume that this particular matched pair should be returned for a replacement to my supplier due to their not functioning correctly as a matched pair or is it simply something I'm overlooking in the setup? If it's any help, here's the full specs of my memory modules as read off the label on the heat spreader (both label details are identical): CMX512-3200C2PT XMS3200 512MB 400MHz XMS3202 v5.1 Any help is appreciated. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 4, 2005 Corsair Employees Share Posted March 4, 2005 From Intel support page: Dual Channel Configuration Install a matched pair of DIMMs (equal in speed: 266MHz PC2100, 333MHz PC2700, or 400MHz PC3200; density: 64 MB, 128 MB, 256 MB, 512 MB, or 1 GB; and technology: 128 Mb, 256 Mb, or 512 Mb) in DIMM 0 in both Channels A and B. If additional memory is to be used, then install another matched pair of DIMMs in DIMM 1 in both Channels A and B. In other words the modules should be in slots 1-3 with slot one being closest to the CPU. Link to comment Share on other sites More sharing options...
Aquilan Posted March 5, 2005 Author Share Posted March 5, 2005 Problem solved! And thankyou for your help. Can't believe I didn't spot the obvious error myself. Guess that's what you get for working with SDRAM all the time and having no experience with DDR configuration.... Looks like I need to do my homework properly in future. :) Anyway, even if it does leave me a little red-faced, it's a better result than having the hassle of some duff RAM on my hands. Thanks again, and especially so for the swift response. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted March 7, 2005 Corsair Employees Share Posted March 7, 2005 No worries mate, it easy to make mistakes with this stuff even if you do it every day! Link to comment Share on other sites More sharing options...
GreenBeret Posted September 10, 2005 Share Posted September 10, 2005 So RAM Guy, if my D875PBZ has 2-256MB DDR400 PC3200 sticks set this way: 1 stick is in slot 1 closest to cpu which I take to be Channel A and the second stick is in slot 4 furtherest from the cpu which I take to be Channel B. My question is I am looking at buying the TwinX1024-3200C2 chips to put in my computer and wonder if I have to move the stick in slot 4 over to slot 3 and put the 2 512mb sticks in slots 2 and 4 to have dual channel in A & B? Link to comment Share on other sites More sharing options...
CMC_SAVAGE Posted September 10, 2005 Share Posted September 10, 2005 I would'nt recommend mixing a TWINX set with your existing RAM. The Version #'s could be different and cause nothing but headaches. How to read Memory Label. If you want more than 1GB of RAM then the TWINX2048-3200C2's would be your best option. Link to comment Share on other sites More sharing options...
GreenBeret Posted September 10, 2005 Share Posted September 10, 2005 I would'nt recommend mixing a TWINX set with your existing RAM. The Version #'s could be different and cause nothing but headaches. How to read Memory Label. If you want more than 1GB of RAM then the TWINX2048-3200C2's would be your best option. OK, since that makes sense to me, I have decided to pursue it this way. Pull out my 2-256mb sticks and put in 2 pair of the CORSAIR ValueSelect 1GB (2 x 512MB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory - Retail Model #: VS1GBKIT400 instead. This will give me 2GB of memory for about half the price. That should work, right? Link to comment Share on other sites More sharing options...
CMC_SAVAGE Posted September 11, 2005 Share Posted September 11, 2005 Theoretically yes. Technically no. The IC's on the VS line of RAM aren't tracked like they are on the XMS line. Meaning Version # and Lot Code. One of the VS KIT's might have different IC's than the other one. I would wait and see what Ram Guy has to say. Link to comment Share on other sites More sharing options...
GreenBeret Posted September 12, 2005 Share Posted September 12, 2005 Bump for Ram Guy! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted September 13, 2005 Corsair Employees Share Posted September 13, 2005 As CMC posted Theoretically yes. Technically no. It should work with out problems, but if you do not have the option to set the memory voltage in your bios it seems to be hit and miss with 4 modules. If you are on a tight budget I would consider VS2GBKit400C3 which are selling for about $220.00. You can search for them on http://www.pricewatch.com and get a list of resellers and the price. Link to comment Share on other sites More sharing options...
GreenBeret Posted September 26, 2005 Share Posted September 26, 2005 As CMC posted It should work with out problems, but if you do not have the option to set the memory voltage in your bios it seems to be hit and miss with 4 modules. If you are on a tight budget I would consider VS2GBKit400C3 which are selling for about $220.00. You can search for them on http://www.pricewatch.com and get a list of resellers and the price. Thanks Ramguy. Will try that route Link to comment Share on other sites More sharing options...
GreenBeret Posted October 31, 2005 Share Posted October 31, 2005 RamGuy, finally got the scratch together to buy my memory and noticed that newegg now is offering the XMS 2GB 184 Pin DDR SDRAM in the TWINX2048-3200 sets for 221.00. Will that work in my D875PBZ and what settings should I be running that at. I see it is a 3-3-3-8 setup. I am pulling out my two 256mb chips and just putting the 2GB in my system. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2005 Corsair Employees Share Posted November 1, 2005 Yes they will run great in that MB. Link to comment Share on other sites More sharing options...
GreenBeret Posted November 1, 2005 Share Posted November 1, 2005 Thanks!! Tell your bosses that you deserve a raise! :biggrin: Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2005 Corsair Employees Share Posted November 1, 2005 I keep telling him that! But he just says I should work harder! :eek: Link to comment Share on other sites More sharing options...
CMC_SAVAGE Posted November 1, 2005 Share Posted November 1, 2005 Those modules should work fine. Make note however, these are not C2 and run @ 3-3-3-8. Link to comment Share on other sites More sharing options...
GreenBeret Posted November 1, 2005 Share Posted November 1, 2005 One other question. The response from new egg on my order acknowledgement shows Corsair D400 1Gx2 TWINX2048-3200 R - Retail I read somewhere about registered memory that had either an R or Re in the description and that it will not work on certain mb's. Think that this is what they are pushing? Here is the web page that shows what they are selling me. http://www.newegg.com/Product/Product.asp?Item=N82E16820145486 Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2005 Corsair Employees Share Posted November 1, 2005 CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory - Retail Model #: TWINX2048-3200 That is the correct part# and it is not a registered part! If it were the part# would be TWINX2048RE-3200 and would not work with your system. Link to comment Share on other sites More sharing options...
GreenBeret Posted November 1, 2005 Share Posted November 1, 2005 Man, you are way underpaid for what you do. Thanks again for the quick response!! Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted November 1, 2005 Corsair Employees Share Posted November 1, 2005 I agree with you! I keep telling my boss the same thing as I just said a few min ago, but he just tells me to work harder! :eek: Link to comment Share on other sites More sharing options...
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