![CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Business Desktop Dc7900 Ultra Slim Desktop - A42 at Amazon.com CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Business Desktop Dc7900 Ultra Slim Desktop - A42 at Amazon.com](https://m.media-amazon.com/images/I/61EHK0f0d5L._AC_UF894,1000_QL80_.jpg)
CMS 4GB (1X4GB) DDR2 6400 800MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with HP/Compaq® Business Desktop Dc7900 Ultra Slim Desktop - A42 at Amazon.com
![Amazon.com: PK Power AC/DC Adapter Compatible with HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics Amazon.com: PK Power AC/DC Adapter Compatible with HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics](https://m.media-amazon.com/images/I/51v1UnE9XNL._AC_UF894,1000_QL80_.jpg)
Amazon.com: PK Power AC/DC Adapter Compatible with HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics
![UPBRIGHT HP 19V / 19.5V 6.9A / 7.1A 135W Adapter For HP Compaq dc7900 Ultra-slim Desktop KP722AV FS489AW#ABA KR671UT#ABA Charger - Walmart.com UPBRIGHT HP 19V / 19.5V 6.9A / 7.1A 135W Adapter For HP Compaq dc7900 Ultra-slim Desktop KP722AV FS489AW#ABA KR671UT#ABA Charger - Walmart.com](https://i5.walmartimages.com/asr/509c9dda-c46e-4b87-9265-0c81322aeb23.7af464bc8748777789f55d5e20315500.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
UPBRIGHT HP 19V / 19.5V 6.9A / 7.1A 135W Adapter For HP Compaq dc7900 Ultra-slim Desktop KP722AV FS489AW#ABA KR671UT#ABA Charger - Walmart.com
![The 3rd and final upgrade to my trusty 15 yr old HP DC7900 ultra slim desktop. With a core 2 duo E8400, 4GB DDR2 and an 80GB 7200rpm hdd (original died, it The 3rd and final upgrade to my trusty 15 yr old HP DC7900 ultra slim desktop. With a core 2 duo E8400, 4GB DDR2 and an 80GB 7200rpm hdd (original died, it](https://external-preview.redd.it/2RRABEYDp-V3wVrPr6WYGKE52CvZyELHcaNU-Qcplno.jpg?width=640&crop=smart&auto=webp&s=2bdf1087507ca6496ce74b4e3458c21f32a86129)
The 3rd and final upgrade to my trusty 15 yr old HP DC7900 ultra slim desktop. With a core 2 duo E8400, 4GB DDR2 and an 80GB 7200rpm hdd (original died, it
![My latest acquisition, a HP Compaq DC7900 ultra slim. Core 2 duo E8400, 2GB ddr3, 160gb hdd, originally with vista, I downgraded to XP pro SP2 : r/windowsxp My latest acquisition, a HP Compaq DC7900 ultra slim. Core 2 duo E8400, 2GB ddr3, 160gb hdd, originally with vista, I downgraded to XP pro SP2 : r/windowsxp](https://external-preview.redd.it/H-AqTyTDdQxv8NiwSzitwPhStOeK99-_bexWpSNNzUQ.jpg?auto=webp&s=e7ab531d4632690daa3bdd7d4e3fc45e6aa72942)
My latest acquisition, a HP Compaq DC7900 ultra slim. Core 2 duo E8400, 2GB ddr3, 160gb hdd, originally with vista, I downgraded to XP pro SP2 : r/windowsxp
![Amazon.com: SLLEA AC/DC Adapter for HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics Amazon.com: SLLEA AC/DC Adapter for HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics](https://m.media-amazon.com/images/I/41CxzCRJPyL._AC_UF894,1000_QL80_.jpg)
Amazon.com: SLLEA AC/DC Adapter for HP Compaq DC7900 USDT Ultra-Slim Desktop PC Power Supply Cord Cable Charger Mains PSU : Electronics
![Refurbished: HP DC7900 Desktop PC with Intel Core 2 Duo 3.0 GHz, 4 GB RAM, 1 TB HDD, DVDROM, Windows 7 Professional 64-Bit - Newegg.com Refurbished: HP DC7900 Desktop PC with Intel Core 2 Duo 3.0 GHz, 4 GB RAM, 1 TB HDD, DVDROM, Windows 7 Professional 64-Bit - Newegg.com](https://c1.neweggimages.com/ProductImageCompressAll1280/83-280-182-03.jpg)