![OFFTEK 4GB Replacement Memory RAM Upgrade for Dell OptiPlex 990 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com OFFTEK 4GB Replacement Memory RAM Upgrade for Dell OptiPlex 990 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com](https://m.media-amazon.com/images/I/61XmhmEup8L._AC_UF894,1000_QL80_.jpg)
OFFTEK 4GB Replacement Memory RAM Upgrade for Dell OptiPlex 990 (Desktop) (DDR3-10600 - Non-ECC) Desktop Memory at Amazon.com
![NeweggBusiness - 4GB Memory RAM for Dell OptiPlex 990 USFF, 390 Mini Tower, 390 Essential Desktop, 390 Small form Factor, 790 Essential Desktop 240pin PC3-10600 1333MHz DDR3 DIMM Black Diamond Memory Module Upgrade NeweggBusiness - 4GB Memory RAM for Dell OptiPlex 990 USFF, 390 Mini Tower, 390 Essential Desktop, 390 Small form Factor, 790 Essential Desktop 240pin PC3-10600 1333MHz DDR3 DIMM Black Diamond Memory Module Upgrade](https://c1.neweggimages.com/NeweggImage/productimage/ABYY_1_201806041458947274.jpg)
NeweggBusiness - 4GB Memory RAM for Dell OptiPlex 990 USFF, 390 Mini Tower, 390 Essential Desktop, 390 Small form Factor, 790 Essential Desktop 240pin PC3-10600 1333MHz DDR3 DIMM Black Diamond Memory Module Upgrade
![A-Tech 16GB Kit (2x8GB) RAM for Dell OptiPlex 9010, 7010, 3010, 990, 790, 390 (USFF/SFF/MT/DT) | DDR3 1333 MHz DIMM PC3-10600 UD A-Tech 16GB Kit (2x8GB) RAM for Dell OptiPlex 9010, 7010, 3010, 990, 790, 390 (USFF/SFF/MT/DT) | DDR3 1333 MHz DIMM PC3-10600 UD](https://c.shld.net/rpx/i/s/pi/mp/3793/prod_18825518824?src=https%3A%2F%2Fm.media-amazon.com%2Fimages%2FI%2F51q8nM6S4mL.jpg&d=6abad2608c85efdad04f709c0542ac02a6809e04)
A-Tech 16GB Kit (2x8GB) RAM for Dell OptiPlex 9010, 7010, 3010, 990, 790, 390 (USFF/SFF/MT/DT) | DDR3 1333 MHz DIMM PC3-10600 UD
![Best Buy: CMS 8GB (2x4GB) Memory RAM Compatible with Dell Optiplex 990 DT / MT / SFF, Ultra CM5126410600DIMMX20201 Best Buy: CMS 8GB (2x4GB) Memory RAM Compatible with Dell Optiplex 990 DT / MT / SFF, Ultra CM5126410600DIMMX20201](https://pisces.bbystatic.com/image2/BestBuy_US/images/mp/products/6192/6192337_sa.jpg)
Best Buy: CMS 8GB (2x4GB) Memory RAM Compatible with Dell Optiplex 990 DT / MT / SFF, Ultra CM5126410600DIMMX20201
![Dell Optiplex 990 Tower Computer PC, 3.30 GHz Intel i5 Quad Core Gen 2, 8GB DDR3 RAM, 500GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64bit (Renewed) | StackSocial Dell Optiplex 990 Tower Computer PC, 3.30 GHz Intel i5 Quad Core Gen 2, 8GB DDR3 RAM, 500GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64bit (Renewed) | StackSocial](https://cdnp3.stackassets.com/f757c94d019f67cc2e5d1bf452146e186f764e8a/store/d5a4e21b32f82ffa5026da7fc0178ca851cf9b54b90dac72a6dc53893ec4/image_processing20210505-103-smo6z3.jpg)
Dell Optiplex 990 Tower Computer PC, 3.30 GHz Intel i5 Quad Core Gen 2, 8GB DDR3 RAM, 500GB Hard Disk Drive (HDD) SATA Hard Drive, Windows 10 Home 64bit (Renewed) | StackSocial
![16GB 4x4GB Memory RAM Compatible with Dell OptiPlex 990 DT / MT / SFF, Ultra C58 849005040709 | eBay 16GB 4x4GB Memory RAM Compatible with Dell OptiPlex 990 DT / MT / SFF, Ultra C58 849005040709 | eBay](https://i.ebayimg.com/images/g/he4AAOSw8Xpez-fB/s-l500.jpg)
16GB 4x4GB Memory RAM Compatible with Dell OptiPlex 990 DT / MT / SFF, Ultra C58 849005040709 | eBay
![A-Tech 16GB RAM Kit for Dell OptiPlex 990 MT/DT/SFF - (4 x 4GB) DDR3 1333MHz PC3-10600 Non-ECC DIMM Memory Upgrade A-Tech 16GB RAM Kit for Dell OptiPlex 990 MT/DT/SFF - (4 x 4GB) DDR3 1333MHz PC3-10600 Non-ECC DIMM Memory Upgrade](https://m.media-amazon.com/images/I/81m7ML04KuL.jpg)
A-Tech 16GB RAM Kit for Dell OptiPlex 990 MT/DT/SFF - (4 x 4GB) DDR3 1333MHz PC3-10600 Non-ECC DIMM Memory Upgrade
![CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 990 Dt/Mt/Sff, Ultra - A69 CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC DIMM Memory Ram Upgrade Compatible with Dell® Optiplex 990 Dt/Mt/Sff, Ultra - A69](https://m.media-amazon.com/images/I/71vyS6H3vnL._AC_UF894,1000_QL80_.jpg)