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Which dominator memory for i7 920 3.6-3.8ghz overclock?


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Hello everyone. I am about to build a system based around i7 920 and Asus P6T Deluxe V2. I will be over clocking it to 3.6-3.8 Ghz level.


I will be using 12GB RAM in total....2 x (3x2GB kit). Corsair recommends these two for over clocking on my mobo.


a) http://www.corsair.com/_datasheets/TR3X6G1866C9DF.pdf




b) http://www.corsair.com/_datasheets/TR3X6G1600C8D.pdf


Is the added price of a) worth it? What will be the relevance of memory timing between the two with regards to overclocking and more importantly the fact that I will have 12GB of memory in total? ::pirate::


Please reply as I need to order the remaining parts for my new build.


Thanks for your time.

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If you want to run with 12 Gig the only choice would be HX3X12G1600C9, if you mix two sets you will most likely be limited to DDR1333 or DDr1600 depending ont he CPU you have and the make and model of MB.


Thanks for the reply. I am totally confused now :[pouts: The memory you recommended even though is a 12GB kit is only DDR1333. Won't that have negative effect on me being able to over clock i7 920 to say 3.8GHZ?


This slightly older article used 2x (3x2gb kit TR3X6G1866C9DF) -


Running 12GB of memory on an Intel Core i7 platform can be done and it is easy to do at that. The sweet spot for running 12GB of memory was found to be at 1600MHz with CL8 timings. Overclocking was possible and was also easy to do with no voltage increase required. Stability was also not an issue as Prime 95 and gaming were done on the system for hours and hours with no ill effects. If you want to run 12GB of memory you have nothing stopping you from doing so.


The two Corsair DOMINATOR 6GB 1866MHz CL9 memory kits that I used in this review retail for $449 shipped each and since you can't hit 12GB at 1866Mhz it is overkill if you ask me. The Corsair Dominator 6GB PC3-12800 DDR3 Triple Channel Memory Kit is a better suited kit to run 12GB of memory as each 6GB kit retails for $252.59 shipped. Spending $500 on 12GB of memory sounds better than spending $900, so be sure to keep this in mind.


Looks like he recommends option b) 2 x( 2 x 3Gb kitTR3X6G1600C8D).


I understand that a 12GB Dominator kit will be out soon. I wonder when it will be available in Europe. I have all my parts here just need to get the memory once I know what will work :o:

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HX3X12G1600C9 is a 1600 MHz part as per the 1600 in the part number :)


I am sorry as I have quiet a few memory related browser windows open and got confused ;) Not being that sharp does not help matters :D:


So basically you are telling me to use this 12GB kit of HX3X12G1600C9 to get to 12GB instead of two kits of TR3X6G1600C8D.


Would running HX3X12G1600C9 instead of TR3X6G1600C8D make a difference in overclocking the CPU? Both are 1600Mh part but I don't understand why having two kits of the dominator version might result in as you said "if you mix two sets you will most likely be limited to DDR1333 or DDr1600" ? I mean if it runs at DDR 1600 then that is ok but why would it run at 1333Mhz? The heatsink on the dominator one looks better.

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TR3X6G1600C8D is tested as it's sold: 3 sticks @ 1600. There is absolutely NO guarantee that 2 packs will work together at their rated speeds, especially since you'd probably be mixing ICs (versions).


Your quote from the review was referring to the TR3X6G1866C9DF. They meant you'd probably have to take the memory speed down a notch or 2.


Memory controllers don't like mixing ICs.

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NP Please let us know if you have any more questions!


So I am typing this on my new PC. Corsair 12GB HX3X12G1600C9 and Corsair HX850watt PSU ;): Silent as a cat.


I am clueless about oberclocking but I have to start somewhere so any help from anyone would be appreciated. Ok so far on my Asus P6T Deluxe V2 board everything is on default auto in my Bios. All 12GB memory is showing and PC boots fine.


Just now I enabled XMP profile in the Bios. Which changed DRAM core Volt to 1.37V. I could get into Vista without any problem. CPU core speed showed as 1600Mhz but when I started Prime95 test it jumped to 2800Mhz. Temp under hardcore full load are 68-70°C otherwise 47°C.


What does CPU MHZ jump to 2800Mhz mean? What can I increase safely to overclock the CPU?




Edit- I disabled XMP profile and then raised the BCLK Frequency to 160Mhz and that gets me to 3.36GHZ Prime95 stable. Anyway I have to read up properly what I am doing before I burn something.



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