NazcaC2 Posted July 18, 2009 Share Posted July 18, 2009 I currently have one TWIN2X4096-8500C5DF in my system (see specs) and just put another order in for TWIN2X4096-8500C5D and don't plan on overclocking it. I know it's suggested not to mix RAM models and revisions. Will it presumably work fine or is it another dice throw? Link to comment Share on other sites More sharing options...
Wired Posted July 18, 2009 Share Posted July 18, 2009 Not guaranteed or recommended = Dice throw. Link to comment Share on other sites More sharing options...
Ylennic Posted July 19, 2009 Share Posted July 19, 2009 Running 4 modules at 1066 seems to be difficult from what tends to be said around here. DDR2-800 is stable for most people, but 1066 is a big step. Like you said, it's a dice throw. I don't anything about Nvidia chipsets and their potential to run at 1066 with 4 DIMMS, but some googling might tell you if other people have had success, and give you an idea of the success rate. Then it's just your decision if you want to give it a shot. Link to comment Share on other sites More sharing options...
NazcaC2 Posted July 19, 2009 Author Share Posted July 19, 2009 Ok thanks. I was at the time also debating on the Q2X8G6400C4DHX (8 GB kit) so if things don't work out when I get the other kit, I'll get that. Reference - http://www.corsair.com/configurator/product_results.aspx?id=393384 Link to comment Share on other sites More sharing options...
NazcaC2 Posted July 20, 2009 Author Share Posted July 20, 2009 They just came in today and they appear to be version 2.1's and my others are 1.1's. I have them installed and so far so good (2GB x 4 @ Auto). I'm going to set up a Memtest momentarily. Update: Zero errors appeared. So, I'll be sticking with both pairs. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted July 20, 2009 Corsair Employee Share Posted July 20, 2009 FYI! With 4 modules I would suggest setting the memory frequency at DDR667 or DDR800 and set the memory Voltage to 2.1 Volts and set the NB/MCH/SPP Voltage to +.2 Volts as well and test the system with http://www.memtest.org. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test. Link to comment Share on other sites More sharing options...
guilhermednt Posted August 7, 2009 Share Posted August 7, 2009 I think I have the same problem. Did you tested the new pair alone, just the 2 ver2.1, without the old ones? I've got a new pair this week. My current is ver1.1 and the new one is ver2.1. When I put any of the new items the PC won't boot, I just get a black screen. Any ideas? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 8, 2009 Corsair Employee Share Posted August 8, 2009 Did you try and reset the MB BIOS with just the new modules only installed and or one module at a time? If so and they will not post please use the On Line RMA Request Form and we will be happy to replace them. Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 9, 2009 Author Share Posted August 9, 2009 I haven't replied in a bit, but I have the P08 BIOS for the EVGA 780i SLI and some of the things you wrote, I don't have in my BIOS (ie. increments of 0.5 V minimum). What should I do in this case? Thanks. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 10, 2009 Corsair Employee Share Posted August 10, 2009 With your MB the memory Voltage and NB SPP Voltage would be the main things to set properly and the SPP Voltage you will add .2 Volts to the default normally its 1.1 or 1.3 Volts. Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 10, 2009 Author Share Posted August 10, 2009 I noted earlier I can only increment in 0.5 Volts on my motherboard. Is this still suitable (+0.5 Volts vs +0.2 Volts)? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 10, 2009 Corsair Employee Share Posted August 10, 2009 Then it may not be the right setting what is the name of the setting, if you can post a pic of the BIOS that may help to make sure you have the right setting. Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 11, 2009 Author Share Posted August 11, 2009 Oops, my mistake, not 0.5 V increments, lol. I don't see where NB Voltage is located though. Here are my attachments. http://avalanchemedia.ca/other/bios%20pics/DSC_0043-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0044-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0045-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0047-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0049-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0050-sm.jpg http://avalanchemedia.ca/other/bios%20pics/DSC_0053-sm.jpg Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 11, 2009 Corsair Employee Share Posted August 11, 2009 With your MB the memory Voltage and NB SPP Voltage would be the main things to set properly and the SPP Voltage you will add .2 Volts to the default normally its 1.1 or 1.3 Volts. So with your MB you would set the memory Voltage to whats printed on the modules or no more than 2.1 Volts and set the NForce SPP to 1.5 Volts Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 12, 2009 Author Share Posted August 12, 2009 Should I also change tRAS to 15 as per the modules or leave it at 18? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 12, 2009 Corsair Employee Share Posted August 12, 2009 Does not matter TRAS will have no effect on memory performance, but you can set it to 15 if you like. Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 12, 2009 Author Share Posted August 12, 2009 Ok, so doing all these steps (memory voltage to 2.1 Volts and SPP to 1.5 Volts) - what does this do compared to keeping things on Auto. What's the benefit and are these values fine for my motherboard and won't damage anything in the long run? I've set it to those values and kept tRAS at 18 as suggested. One of the fans have sped up I've noticed. Should I do a Memtest? Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 12, 2009 Corsair Employee Share Posted August 12, 2009 If the system is stable then I would not worry about it. and I am not sure what you are asking "what does this do compared to keeping things on Auto. What's the benefit and are these values fine for my motherboard and won't damage anything in the long run?" These are the suggested settings in this configuration, you are welcome to try anything you like but that would be our suggestion in this configuration. Link to comment Share on other sites More sharing options...
NazcaC2 Posted August 12, 2009 Author Share Posted August 12, 2009 Ok, thanks for the help. I'll keep it on the settings you suggested and see how it goes. Link to comment Share on other sites More sharing options...
Corsair Employee RAM GUY Posted August 13, 2009 Corsair Employee Share Posted August 13, 2009 NP Please let me know if you have any more questions! Link to comment Share on other sites More sharing options...
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