LOL at those who think that if "Newegg" doesn't have it then it doesn't exist. Newegg is more for mainstream components whereas JPS is asking for more of a specialty RAM that is harder to find but definitely exists. Modules that are ECC are also usually registered (buffered) for both stability and scalability, but there is a performance hit when using registered memory. Fortunately, as per JPS' request, there are manufacturers like Micron and Samsung that produce 4GB DDR3 non-registered (unbuffered) ECC modules, however they do not sell them as kits, only individually, so if you want 24 GB, you'll have to buy 6 modules separately instead of two 12GB (4GB x 3) kits.
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Samsung 4GB PC3-8500 DDR3-1066MHz ECC Unbuffered CL7 240-Pin DIMM
Mfr Part No: M391B5273BH1-CF8 - $359.99
http://www.memory4less.com/m4l_itemdetail.asp?partno=M391B5273BH1-CF8&itemid=1442048310
Micron 4GB PC3-8500 DDR3-1066MHz ECC Unbuffered CL7 240-Pin Dual Rank DIMM
Mfr Part No: MT18JSF51272AY-1G1 - $359.99
http://www.memory4less.com/m4l_itemdetail.asp?partno=MT18JSF51272AY-1G1&itemid=1440660127
Micron 4GB PC3-8500 DDR3-1066MHz ECC Unbuffered CL7 240-Pin Dual Rank DIMM
Mfr Part No: MT18JSF51272AY-1G1A1 - $359.99
http://www.memory4less.com/m4l_itemdetail.asp?partno=MT18JSF51272AY-1G1A1&itemid=1440660235
Micron 4GB PC3-8500 DDR3-1066MHz ECC Unbuffered CL7 240-Pin Dual Rank DIMM
Mfr Part No: MT18JSF51272AY-1G1AZES - $359.99
http://www.memory4less.com/m4l_itemdetail.asp?partno=MT18JSF51272AY-1G1AZES&itemid=1440657180
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