New Wifi card on 4101sl Pavilion DV3

Hi all!
I have a new router, with Cabinet WiFi frequency: 2.4 and 5 ghz...
My laptop supports only 2.4 ghz. It is possible to replace my wireless card with a new wifi card supporting 5 ghz?
BIOS restricts the types of cards to use, or can be used to any Mini PCI Express?

For example, I buy Intel® Wireless WiFi Link 4965AGN?

It is a useful update? There is a clear difference between 2.4 GHz and 5 GHz?

Thank you for attention

5 ghz provides wireless performance you are right to want to use it. You also reason ask if BIOS limits your choice in wireless for the laptop adapters, because there is a limit. The manual says it can use an Intel Ultimate-N 6300 which can operate in the 5 ghz band:

Manual

But the manual does not give the part number for this map. Here's a 6300 card that is known to work in HPs and should work in your:

http://www.eBay.com/ITM/Intel-Centrino-ultimate-N-6300-572511-001-HP-8440p-2540p-wifi-adapter-WLAN-card-/281203164493?PT=US_Internal_Network_Cards&hash=item417903c54d

And here's a Broadcom who IS in your manual of the card and works at the frequency of 5 GHz:

http://www.eBay.com/ITM/HP-Compaq-582564-002-582235-002-dual-band-Broadcom-BCM943224HMS-wireless-card-/301004750107?PT=US_Internal_Network_Cards&hash=item461547fd1b

You must use a HP card or BIOS allows you to block the computer from starting.

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