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Genuine OEM Switching Power Supply Unit PSU For DELL Optiplex 390 790 990 3010 Inspiron 537s 540s 545s 546s 560s 570s 580s 620s Slim Desktop Form Factor - Walmart.com
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Optiplex 990, video card upgrade - Dell Community
CN-07GC81 - H250AD-00 Dell Optiplex 790 990 3010 7010 DT Power Supply – Kamcom.com
Dell OEM Optiplex 790 990 SFF Desktop Power Supply 1GC38
Dell OptiPlex - Wikipedia
Which Dell Optiplex MT (any model 990, etc.) can I change the graphics card without upgrading the PSU? Which GPUs would work? - Quora
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