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CMS 4GB (1X4GB) DDR3 10600 1333MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Touchsmart 520-1040Xt 520-1047C 520-1049, 520-1050 - A30 - Walmart.com
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A-Tech 8GB (2 x 4GB) RAM for HP TOUCHSMART 520-1020 AIO | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com
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HP TouchSmart 23" Full HD Touchscreen All-In-One Computer, Intel Core i7 i7-2600S, 8GB RAM, 2TB HD, Blu-Ray/DVD Combo Drive, Windows 7 Home Premium, 520-1070 - Walmart.com
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OFFTEK 4GB Replacement Memory RAM Upgrade for HP-Compaq TouchSmart 520-1047c (DDR3-10600) Desktop Memory at Amazon.com
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HP TouchSmart 23" Full HD Touchscreen All-In-One Computer, Intel Core i7 i7-2600S, 8GB RAM, 2TB HD, Blu-Ray/DVD Combo Drive, Windows 7 Home Premium, 520-1070 - Walmart.com
![A-Tech 8GB (2 x 4GB) RAM for HP TOUCHSMART 520-1020 AIO | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com A-Tech 8GB (2 x 4GB) RAM for HP TOUCHSMART 520-1020 AIO | DDR3 1333MHz SODIMM PC3-10600 204-Pin Non-ECC Memory Upgrade Kit at Amazon.com](https://m.media-amazon.com/images/I/71P2wvd1DVL._AC_UF894,1000_QL80_.jpg)