So, why Dell Latitude D520, that got despize by the computer assholls expertize, and why is the favourite for terrorism? its because, either can or can not have dual core, if "it is the chipset, some have the 945GM which supports dual core and some have the 945GML which does not support dual core" however it supports an Intel adapter caled : "Intel Half Centrino Ultimate-n 6300 Pci-e Card 633anhmw 802.11a/b/g/n 2.4 Ghz and 5.0 Ghz Spectra 450Mbps wifiI" (link bellow) as you see, restritive buy , to Russia, Brazil and so on...

http://www.danallosso.me/products/intel-half-centrino-ultimate-n-6300-pci-e-card-633anhmw-802-11abgn-2-4-ghz-and-5-0-ghz-spectra-450mbps-wifii/

Alfa Network APA-M25 dual band 2.4GHz/5GHz 8 / 10dBi high gain directional indo

http://www.ebay.com/itm/252833795001