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New RAM might be causing Program Crashes


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Good day. I'm new to the forums and is currently looking for help.


I'm a 3D Production Artist in profession and so I utilize 3D Software which at times require High Amounts of RAM so I upgraded my System to 64bit and purchased a pair of Corsair TWIN2X4096-6400C5DHX G RAM. Previously I was using the Corsair TWIN2X2048-6400 G.


Now to my question. Is my old RAM Compatible with my new RAM? Since I both use them.


So far when I'm playing games or using other programs, everything goes fine, until I use my 3D Software. I receive several errors like.


"Display driver nvlddmkm stopped responding and has successfully recovered."




"exception code 0xc0000005". which is more hardware related.

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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 and models (Like Yours) 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. Thus you are advised to buy all the DRAM at the same time and in this way be more assured of getting the same versions. If you buy online, be sure to specify same versions of the modules and do not expect even then that they will work and again, no support unless you purchase a quad kit.


For a four DRAM slot population of 800Mhz DRAM you are advised to drop the bandwidth to 667Mhz and raise the NB Voltage +.2v.


Please research this thread:




There is a limitation of the On Motherboard (Intel) memory controller or On CPU (AMD) 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.


My advice would be to use the 4GB sticks and sell the 2GB sticks. You can try to use them all though with a drop in bandwidth from 800Mhz --> 667Mhz and a raise of the memory controller's voltage +.2v.

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I wasn't planning on RMAing the new Modules I bought, I was just asking if there was a compatibility issue.


I'll take your advice and sell my old Twin RAM (TWIN2X2048-6400 G).


Too bad actually, I was planning on selling the above mentioned RAM and purchasing another pair of (TWIN2X4096-6400C5DHX G) and jack-up my RAM to 8GB.




I think I see the problem now. Once I removed the TWIN2X2048-6400 G I saw that it was running at 1.9v (default) with 5-5-5-12.


My new RAM was running at 1.8v (default) with 5-5-5-18.

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