Saviorsol Posted October 5, 2007 Share Posted October 5, 2007 Ok so I have been trying to search here and have found several related threads saying that this mobo and 4x1gb modules @ 1066 does not work. Being the semi-noob I am at this though I don't really know what the answers fully mean. I've seen change the settings to 800 and the voltage to 2.1 (+.03) so heres my list of questions... Is it just this mobo memory controller thats the problem? How much of a performance hit is that downgrading? Would 2x2048 modules work? Would it just be better to run 3x1024 @1066? Is there a comparably priced/quality mobo that will support all 4 modules@1066? Been almost 7 years since I built a mean gaming rig like this system was supposed to be and this is breaking my heart:(:. Any help in understanding is very much appreciated. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 5, 2007 Corsair Employees Share Posted October 5, 2007 With just two modules and a 1066 FSB CPU you should not have any problems running at DDR1066 with the memory. But with 4 modules DDR800 would be suggested you can try and increase the NB/MCH Voltage +.05 Volts and see if the system is stable with http://www.memtest.org. Link to comment Share on other sites More sharing options...
Saviorsol Posted October 8, 2007 Author Share Posted October 8, 2007 Thank you very much for the reply. I was hoping for a little more detail on the list of questions so I may be able to narrow down my options. Is there a benefit to running the 1066mhz memory at pc6400 speeds I don't know about or if that's the case shouldn't I just return the memory and get cheaper pc6400. Even if 2 modules would work I am not having any luck finding a 4gb kit of pc8500 with only 2 modules (does Corsair make one?) On the flip side I am not finding a mobo that will guarantee support for four 1gb modules of pc8500 either. There has to be one somewhere or else why would they make the quad pc8500 kits. If you or anyone could point me in the direction of either a mobo that will use the 4 1gb modules or a 2 module 4gb kit, of pc8500 not pc6400, I would be eternally grateful! Link to comment Share on other sites More sharing options...
DerekT Posted October 8, 2007 Share Posted October 8, 2007 The memory controller can not keep up with the extra DRAM at the rated 8500 speed. You will need to drop the speed of the DRAM from 1066Mhz to 800Mhz. If you had purchased 4 X 1024MB of PC6400 (800Mhz) DRAM, then you would have had to drop to PC5300 (667MHz) DRAM, etc. 2 X 2048 will not issue this problem. This is a problem of all 4 banks being populated. Think of it this way. If you have a small phone book, then when you go into the index to find the page where you will find the phone number you are doing so at a certain speed due to the pages of the Index. Then you have to drive through the pages to get to the number. Now if your index is twice as large and the pages twice as many, then it takes longer to access the data. Now DRAM has a Strobe and the length of the strobe is how long the rows and columns can be left open before they must be refreshed. There is not enough time for the dram to be refreshed and then accessed with 4GB at the full access speed of the DRAM. The chipsets are optimized for 2GB, not 4GB and for 2 DRAM slots, not 4 DRAM slots populated. You can overclock the FSB (and hence the Memory Controller Hub = MCH) to gain some extra bandwidth and thus access the capabilities of the DRAM since the chipset is now clocked up. Usually when you clock up the FSB and concurrently the Memory Controller Hub (MCH) you need to raise the voltages of the CPU/MCH a bit as well. Link to comment Share on other sites More sharing options...
Saviorsol Posted November 14, 2007 Author Share Posted November 14, 2007 Back from the past. Ive been working this system for weeks now trying to get it stabilized to no avail. I followed your instructions Ramguy to drop the memory to 800mhz and kicked the voltage up to +.05V Passed memtest but the machine would started rebooting randomly about twice a day. I dropped to three modules instead of the 4 and went back to letting the bios set everything automatically, so 3x1024 @1066, 5-5-5-15 at +.04V. Things seemed better for about 2 weeks, only 1 or 2 random crashes. Now in the last week its all went bad again. Machine started rebooting like mad, rebooted the last time and wouldn't post again. I removed all the modules and rotated them in one at a time, 3 would post 1 would not. Bad stick I assume. Couple days later same thing. Same test, 2 will post now and another will not. The 2 that will post are even acting odd, the entire system is hitching during any high mem utilization. So 2 dead sticks out of four and two acting flaky? HELP Link to comment Share on other sites More sharing options...
DerekT Posted November 14, 2007 Share Posted November 14, 2007 Clearly this board is having issues with the DRAM. Can you test the DRAM in another board? If you move to RMA of the DRAM I would also move to RMA of the board as it would seem to be the origination of the issue. Concurrent DRAM sticks being damaged points to this. Keep in mind that DRAM is passive, there is no possible way that the DRAM could damage the board. The board, however, can damage DRAM. So if you don't want to go through the RMA procedure and find the issue repeats, then I advise a motherboard RMA. You would do well to test this DRAM single stick by single stick in another motherboard set to 1066Mhz and 2.2v for version 1.xx or 2.1v for version 2.xx. Link to comment Share on other sites More sharing options...
Saviorsol Posted November 14, 2007 Author Share Posted November 14, 2007 I am doing just that. Unfortunately I do not have another mobo capable of testing the memory in but honestly if I could find one (or someone could recommend one:laughing:) that was tried and true to use all four sticks natively @1066mhz I would probably just go buy it since the p35-ds3r wouldn't even at its best. Link to comment Share on other sites More sharing options...
DerekT Posted November 14, 2007 Share Posted November 14, 2007 I am doing just that. Unfortunately I do not have another mobo capable of testing the memory in but honestly if I could find one (or someone could recommend one:laughing:) that was tried and true to use all four sticks natively @1066mhz I would probably just go buy it since the p35-ds3r wouldn't even at its best. Natively? I don't think so, however you may wish to read this thread: http://www.houseofhelp.com/v3/showthread.php?t=64360 Link to comment Share on other sites More sharing options...
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