I have finally found a good working Latitude D830, my initial plans for converting my D620 were scrapped. D830 have the following configuration:
CPU Brand Name: Intel® Core2 Duo CPU T7300 @ 2.00GHz
Motherboard Chipset:Intel GM965 X3100 (Crestline-GM) + ICH8M
Memory: 3GB
BIOS Version: A15
Network Card:Broadcom 802.11g Network Adapter