ForEvo Posted October 26, 2007 Share Posted October 26, 2007 Can these work togheter, already got 2GB 8500C5DF v2.1 and found a pair of 2GB 8500C5D v1.2 XMS850Xv1.X...MICRON.........64Mx8...Rev.D XMS850Xv2.x...Qimonda........64Mx8...70Nm Im currently running 1125mhz 2.25v on P35-DS4 rev2.0 and Q6600 @ 3.6ghz. Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 26, 2007 Corsair Employees Share Posted October 26, 2007 Yes but you may have to set the memory frequency at DDR800 and set the memory Voltage to 2.0-2.1 Volts and test the system with http://www.memtest.org. Link to comment Share on other sites More sharing options...
ForEvo Posted October 27, 2007 Author Share Posted October 27, 2007 Yes but you may have to set the memory frequency at DDR800 and set the memory Voltage to 2.0-2.1 Volts and test the system with http://www.memtest.org. But shouldnt they run at 1066mhz atleast if they are specified for that? (all 4gb and no OC) Or is it just because there 4 of them? I recently built a computer to a friend and it worked fine with 2 sets of 2gb pc8500C5D (4gb) at 1066Mhz and 2.2v. One more question, how come they show up as this? Currently only runnig 2gb, the other pair will be here on monday.. http://static.pici.se/pictures/DXaYIiASc.jpg Under memory (in Cpu-z) it shows up as 562.5mhz and its correct, 1125mhz in bios! Link to comment Share on other sites More sharing options...
DerekT Posted October 27, 2007 Share Posted October 27, 2007 But shouldnt they run at 1066mhz atleast if they are specified for that? (all 4gb and no OC) Or is it just because there 4 of them? I recently built a computer to a friend and it worked fine with 2 sets of 2gb pc8500C5D (4gb) at 1066Mhz and 2.2v. One more question, how come they show up as this? Currently only runnig 2gb, the other pair will be here on monday.. http://static.pici.se/pictures/DXaYIiASc.jpg Under memory (in Cpu-z) it shows up as 562.5mhz and its correct, 1125mhz in bios! You can try it and it might well work with 4 DRAM slots populated, but generally this will not be fully stable and a drop in bandwidth is needed. This is a problem/function of the memory controller and not the DRAM. Usually you need to overclock to access the abilities of the DRAM with 4 X 1024 and some can not even access this. Do NOT expect 1066 with all four banks populated. Be Happy if you get it but your mainboard is optimized for two banks populated and does NOT support all four banks running with full speed of the DRAM. BE CLEAR ON THIS BEFORE YOU PURCHASE THE DRAM! They show up in the SPD as 800Mhz as that is the maximum SPD allowed in the JEDEC standards. If you look at your CPU-z you will see that in the SPD tab, there is another setting. That is the 533 (Dual channel = 533 X 2 = 1066Mhz) EPP (Extended Performance Profile) and this shows the high end setting of 1066Mhz. Link to comment Share on other sites More sharing options...
ForEvo Posted October 27, 2007 Author Share Posted October 27, 2007 You can try it and it might well work with 4 DRAM slots populated, but generally this will not be fully stable and a drop in bandwidth is needed. This is a problem/function of the memory controller and not the DRAM. Usually you need to overclock to access the abilities of the DRAM with 4 X 1024 and some can not even access this. Do NOT expect 1066 with all four banks populated. Be Happy if you get it but your mainboard is optimized for two banks populated and does NOT support all four banks running with full speed of the DRAM. BE CLEAR ON THIS BEFORE YOU PURCHASE THE DRAM! They show up in the SPD as 800Mhz as that is the maximum SPD allowed in the JEDEC standards. If you look at your CPU-z you will see that in the SPD tab, there is another setting. That is the 533 (Dual channel = 533 X 2 = 1066Mhz) EPP (Extended Performance Profile) and this shows the high end setting of 1066Mhz. Ok I understand, well, i bought them beceause 4gb of these worked fine @ 1066mhz in my friends computer that i built, so i thought it might work for me too :D O really should have ordered two packs of these because now ive got 2gb ver1.2 and 2gb ver2.2. Hopefully they work togheter and hopefully they can stand atleast 1066mhz with 2.2v maybe 2.3v with Corsair Fan (already mounted) We both got same bords also, Gigabyte P35-DS4 rev2.0, both systems are the same except he´s got 4gb and i 2gb.. Link to comment Share on other sites More sharing options...
DerekT Posted October 27, 2007 Share Posted October 27, 2007 Hopefully they work together and hopefully they can stand atleast 1066mhz with 2.2v maybe 2.3v with Corsair Fan (already mounted) We both got same bords also, Gigabyte P35-DS4 rev2.0, both systems are the same except he´s got 4gb and i 2gb.. Please let me know how this turns out for you. Good luck :) Link to comment Share on other sites More sharing options...
ForEvo Posted October 28, 2007 Author Share Posted October 28, 2007 Please let me know how this turns out for you. Good luck :) Rams will be here either tomorrow or tuesday so ill let you know as soon as i have done some tuning. I really dont want to lower my Q6600 oc at all, its 24/7 stable @ 3,6ghz and I can set memory to either 1080mhz or 1125mhz. Only lower choice after with that setup is 900mhz on Ram´s.. 450Fsb *8 We´ll see when they arrive :D Link to comment Share on other sites More sharing options...
DerekT Posted October 28, 2007 Share Posted October 28, 2007 With the overclock of the MCH and FSB, you might well be able to make 900MHz with them. It's all a bit of a dice throw though. Link to comment Share on other sites More sharing options...
ForEvo Posted October 30, 2007 Author Share Posted October 30, 2007 With the overclock of the MCH and FSB, you might well be able to make 900MHz with them. It's all a bit of a dice throw though. Picked them up today, wouldnt boot with ver2.2 in slots 1-3 and ver1.2 in slots 2-4 but it worked fine when i replaced them and put ver1.2 in slots 1-3 etc. Currently running: 450 fsb *8 Quad6600 3600Mhz 1080mhz @ 2.25v with Corsair fan Memtest stable and Vista x64 stable. 1650*1080 picture: http://img146.imageshack.us/img146/7259/4096mbnd0.png You think i can manage 1125mhz? Maybe with 2.3v? :D Link to comment Share on other sites More sharing options...
ForEvo Posted October 30, 2007 Author Share Posted October 30, 2007 And BTW, what does the "High Speed DRAM DLL Setting" actually do? I can choose between [Option1] and [Option2] ? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 30, 2007 Corsair Employees Share Posted October 30, 2007 You can get more explanations for BIOS settings at Techarp! Link to comment Share on other sites More sharing options...
DerekT Posted October 30, 2007 Share Posted October 30, 2007 And BTW, what does the "High Speed DRAM DLL Setting" actually do? I can choose between [Option1] and [Option2] ? This option doesn’t effect ram timing at all when the SPD is set to manual. This option (High Speed Delay Locked Loops (DLL)) uses an antifuse circuit for High-Speed DRAM to insert a 90 degree phase shifter (low jitter) in order to influence the clock duty error. When you set to manual, this feature will not be activated. You will notice that most enthusiasts who have tried using this setting have found no difference. If they use the auto settings on the DRAM and set to Option 2 they might well find that they have a more stable system. Link to comment Share on other sites More sharing options...
ForEvo Posted October 30, 2007 Author Share Posted October 30, 2007 This option doesn’t effect ram timing at all when the SPD is set to manual. This option (High Speed Delay Locked Loops (DLL)) uses an antifuse circuit for High-Speed DRAM to insert a 90 degree phase shifter (low jitter) in order to influence the clock duty error. When you set to manual, this feature will not be activated. You will notice that most enthusiasts who have tried using this setting have found no difference. If they use the auto settings on the DRAM and set to Option 2 they might well find that they have a more stable system. Well it works nice in option 1 so ill lleave it alone ;) Link to comment Share on other sites More sharing options...
DerekT Posted October 30, 2007 Share Posted October 30, 2007 Picked them up today, wouldnt boot with ver2.2 in slots 1-3 and ver1.2 in slots 2-4 but it worked fine when i replaced them and put ver1.2 in slots 1-3 etc. Currently running: 450 fsb *8 Quad6600 3600Mhz 1080mhz @ 2.25v with Corsair fan Memtest stable and Vista x64 stable. You think i can manage 1125mhz? Maybe with 2.3v? :DKeep in mind that DRAM damage is often cumulative and degenerative. It takes time to damage it with higher speeds and voltages. You may find an unstable system in time if you raise the voltages and speed too high. You have four DRAM banks filled. There is a sweet spot and you would do well to find it and NOT go past it or I have no doubt we will see you here in the future bemoaning non-working DRAM. I keep a log of these such posts for an "I told you so" post. :D: The choice is yours however. Corsair is such a good company, that even when people damage DRAM through their own actions, it is RMA'd. Link to comment Share on other sites More sharing options...
ForEvo Posted October 31, 2007 Author Share Posted October 31, 2007 Keep in mind that DRAM damage is often cumulative and degenerative. It takes time to damage it with higher speeds and voltages. You may find an unstable system in time if you raise the voltages and speed too high. You have four DRAM banks filled. There is a sweet spot and you would do well to find it and NOT go past it or I have no doubt we will see you here in the future bemoaning non-working DRAM. I keep a log of these such posts for an "I told you so" post. :D: The choice is yours however. Corsair is such a good company, that even when people damage DRAM through their own actions, it is RMA'd. Desided to keep them @ 1080mhz. 4gb Dominators @ 1080mhz is anyways enough to work fast in Vista and games. I´m happy as they are, sure way better than 800mhz other get stuck at! Link to comment Share on other sites More sharing options...
DerekT Posted October 31, 2007 Share Posted October 31, 2007 That's a very good idea. Keep in mind that you are already one of the lucky ones who have made full DRAM speed on 4 X 1024. Why you need to keep this in mind is that the MCH (Northbridge Memory Controller Hub) IS working double time to the tune of a 2 X longer que and doing it in the same speed and timings as if it was only accessing 2 DRAM slots. Link to comment Share on other sites More sharing options...
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