HP DC5800 - Manual (Page 29)

NVIDIA GeForce 8400 GS (256 MB DH) PCIe x1 Graphics Controller display resolutions and refresh rates
NOTE: Other resolutions may be available but are not recommended as they may not have been tested and qualified by HP.
Analog Resolution Maximum Refresh Rate
640 x 480 85 Hz
800 x 600 85 Hz
1024 x 768 85 Hz
1280 x 1024 85 Hz
1600 x 1200 85 Hz
1920 x 1080 85 Hz
1920 x 1200 85 Hz
1920 x 1440 85 Hz
2048 x 1536 85 Hz
Digital Resolution Maximum Refresh Rate
640 x 480 85 Hz
800 x 600 85 Hz
1024 x 768 85 Hz
1280 x 1024 85 Hz
1600 x 1200 85 Hz
1920 x 1200* 85 Hz
* Reduced blanking timings used when connected to a single-link DVI monitor
QuickSpecs
HP Compaq dc5800 Business PC
Technical Specifications - Graphics
DA - 12863 U.S. QuickSpecs — Version 3 — 4/2/2008 Page 29