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use corsair memory with MSI K9A2 Platinum


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Hi... i am in the process of choosing new parts for my new computer, was wondering which Corsair ram will work good in a MSI K9A2 Platinum (AM2/AM2+ board).


i hoped to get DDR2 1066 memory but it seems like this MSI board doesn't like it from what ive seen... so i guess DDR2 800 is the next option... thats just what ive heard.


i am considering the TWIN2X2048-6400C4PRO, or TWIN2X4096-6400C5DHX... how ever i am not sure whats the difference between the two besides timings.. whats the DHX supposed to mean, and i will be using this memory in a high performance / gaming rig..


feedback is greatly appreciated!



note: i have used the memory configurator, but it did not list the K9A2 Platinum.

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  • 2 weeks later...

I too have an k9a2 motherboard on its way and was wondering if these memory kits were compatible.





The reason I am wondering is because according to MSI...


The motherboard supports 1.8v ddr2 sdram dimm's BUT the 8500C5's are both rated for 2.1v's. I'd love to make sure I'll be able to get it to 1066 with this motherboard because I'm going to get a phenom as well. Not sure about the timings I'd need, have to research more on that.

Thanks for your time.

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I will venture this question:


msi recommends 1.8V RAM explicitely. Supposing I pick up the superfly

TWIN2X2048-8500C5D or even finer TWIN2X2048-8500C5D which have stock voltages of 2.x and 2.xx. I put them in the board... before I can adjust the voltages, aren't they dangerously underpowered/low-V?


Next, I'll adjust the voltage up to the recommended point (we're assuming the board allows it.) Is Corsair's recommendation of this RAM an indication that once I adjust the voltage on the board up to 2.xx, it's stable? Do you expect it might go higher?


If these were at 1.8V, are they 6400-speed? I don't think I get it yet...

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hi i have this mobo aswell im having issues with my memory twin2x4096-6400c5


looking at the recommended memory i might have got it wrong or can i alter the timing and volts to make it stable at the moment its on auto and i can only make it stable with one stick on the mobo i was going to rma the sticks but im not sure if there faulty or incompatible

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  • 1 month later...

hello, i have the same problem with the TWIN2X2048-8500C5

i set the voltage to 2.1 and it still freezes when i set it to 1066, also it wont show up as duel channel.

im sorry im not very good at these things

here are some screen shots







please help me thank you

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These Phenoms are having issues when set to high DRAM speeds.


1066 with Phenom CPU's is a not at all a given at this time. Many people are finding issues and move to 6400Mhz. Enter your BIOS and set the DRAM voltage to 2.2v (for version 1.xx) or 2.1v (for version 2.xx+). Set the timings to 5-5-5-15.


Download Memtest from http://www.memtest.org. Burn the Memtest ISO image to a CD. Boot to the Memtest CD and allow for two full passes.


You will not notice much of a difference as the HT of the Phenom is not at all saturated and the DRAM is running even at 800Mhz, faster than the data on the transport stream. Most people are finding that dropping to 800Mhz deals with all of their issues. The On CPU Memory Controller of the Phenom is not at all mature and is problematic at this time. Later revisions will no doubt, smooth this issue out.


For research:



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  • 9 months later...
I Bought originally the 4gb kit of 1066 dominator (8500c5df kit) for this build, upon getting it up and running i decided to buy an additional 4Gb of the same memory this time in the 8500c5d kit (without the fan as i would not need a second). This is where the trouble started, first My graphics controlling program which i wont name because i dont know if theyre considered a competitor but it is a common program for 50% ish of the video cards used, wouldn't support more than 4gb and caused all sorts of video bugs and crashing. I repaired this manually by wiping out all video related software and drivers and reinstalling the latest updates. I could then enter vista-64 for more than a few seconds before crashing, at this point windows would start up normally but would religiously crash about 30 seconds to one minute after startup. I went into the bios and set the memory to 800 Mhz and set the timings to 5-5-5-15-2t as reccomended, running unganged at 2.1v's . this solved stability but here is my problem now, i bought products specifically listed to be reccomended for one another, i bought a 9950BE processor for my k9a2 platinum as an AM2+ processor was required and bought high performance 1066 memory with fans which was a cool add on, but i cant use it to the specifications it was sold to me as. I contacted AMD and they sent me to MSI, and now MSI tells me its a memory problem and to Contact Corsair. Anyone know of any solutions or have the same problems. just let me reiterate i have checked my BIOS settings multiple time BOTH channels are manually set to the timings i find on the website as well as voltage, all 8gb registers but will not run at 1066 only 800. Please help i'm getting discouraged by something a week ago i was very excited about, i love corsair memory and recommend it to all, help me keep my faith.
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I purchased CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model TWIN2X4096-8500C5 - in November 2008 from ***egg and the system had no problems. Memory chip shows Ver1.1

I just purchased another set CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory Model TWIN2X4096-8500C5 and the system is having problems. Memory chip shows Ver. 4.1 (January 2009)


1.With both sets in the motherboard the system will freeze after a couple of minutes.

2.With only the original set the system works fine. Ver1.1

3.With only the new set the system will not boot. Ver. 4.1


Where does the problem lie? Motherboard or memory.

Thank you for any and all feedback.

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but will not run at 1066 only 800. Please help i'm getting discouraged by something a week ago i was very excited about, i love corsair memory and recommend it to all, help me keep my faith.


You are advised to drop the bandwidth when populating with all four DRAM slots.


The only memory Corsair supports in a four DRAM slot population is their Quad kits. This does not mean two dual kits or even worse two dual kits of different versions will not work together, just that you have no recourse to RMA Corsair if they do not work together. If there are problems with the DRAM modules, they are still supported via lifetime warranty, but that is for physical defects and errors in a two stick kit mode. Matched Quad sets are highly binned modules for a four slot population. The Dual sets are tested as a kit, not a Quad and warranted as a dual kit, not a Quad setup. You need to Memtest them as Kits (2 modules, not as a four DRAM slot population). If they fail as a kit or singly, then you have RMA. Keep in mind that there is no support for mixing and matching different versions of DRAM either since different version are of different fabrications and/or manufacturers. They might work, they might not work, but you have no support if they do not work.


Please research this thread:




There is a limitation of the On Motherboard (Intel) memory controller or On CPU (AMD, Intel i7) and a population of all four banks at the full speed of a two bank run. This limitation is across the board with both AMD and Intel chipset based boards, DDR, DDR2 and DDR3.


Keep in mind that often issues can arise in the longer term even though you have shorter term stability. The issues seldom damage the DRAM unless you raise the DRAM voltage too high. They damage the on CPU (AMD) memory controller which has a harder time keeping up with the demands of a four DRAM slot population being run as fast as a two DRAM slot population.


Download Memtest86+ V2.11 from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.

Download CPU-z from

Insert a single stick of DRAM in your board. Enter BIOS and set the DRAM to 800Mhz and the Chipset Voltage (MCH/Northbridge/SPP) +.2v.

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