How is this any different from http://www.amazon.com/Intel-Network-7260-HMWG-Wireless-AC-Bluetooth/dp/B00DMCVKMU ?

Thanks for asking. The difference is the .R in the part #, which stands for revised/revision. Intel released the new revised model on September 1, 2014 in order to increase compatibility with existing systems.

WILL THIS WORK IN HP PAVILLION G7 1150US?

Yes it should. However, HP is notorious for having a whitelist built into their BIOS. BIOS is the basic in/out system, essentially the most basic simple foundation(firmware) that a computer operates with. HP sometimes builds this whitelist into their BIOS to detect and block aftermarket peripherals like WiFi cards that aren't sold by them. They claim all sorts of reasons like FCC certification and what not but the reason truly is that: If you want a laptop with a faster WiFi card, HP would like you to buy a whole new laptop! So, with that let's Google your model number and see what happens!So I do not know what type of Processor you have but your Laptop does indeed have a Whitelist for WiFi or WLAN cards. Here is a list of approved cards for your Laptop depending on your processor:WLAN moduleDescription - Spare part numberFor use on all computer models: Broadcom 4313 802.11b/g/n 1×1 WiFi and 2070 Bluetooth 2.1+EDR Combo adapter (BT3.0+HS ready) 600370-001 Ralink 5390GN 802.11b/g/n 1×1 WiFi Adapter 630703-001Ralink RT3090BC4 802.11b/g/n 1×1 WiFi and Bluetooth 2.1+EDR Combo Adapter (BT3.0+HS ready) 630705-001For use only with computer models equipped with an AMD processor: Atheros 9285G 802.11b/g/n 1×1 WiFi Adapter 605560-005Atheros AR8002WB-1NGB 802.11b/g/n 1×1 WiFi and Bluetooth 2.1+EDR Combo Adapter (BT3.0+HS ready) 593127-001 Broadcom 4313 802.11b/g/n 1×1 WiFi Adapter 593836-001Broadcom 4313GN 802.11b/g/n 1×1 WiFi and 20702 Bluetooth 4.0 Combo Adapter 657325-001Realtek RTL8191SE 802.11b/g/n 1×1 WiFi Adapter 640926-001Realtek 8188BC8 802.11a/b/g/n 2×2 WiFi and Bluetooth 3.0+HS Combo Adapter 602993-001For use only with computer models equipped with an Intel processor: Atheros 9285G 802.11b/g/n 1×1 WiFi Adapter 518436-001Intel Centrino Advanced-N 6230 631956-001:smileysad:Intel Centrino Wireless-N 1000 593530-001.As you can tell they are all crap. You request a Bios mod at a website/ forum called bios-mod. There you post all your info and backup of your BIOS someone will download, modify, and reupload a modded BIOS for you. They will give step by step instructions in the file they give back to you. I just did this last night for my wife's Lenovo laptop that had the same problem. After I flashed the modified BIOS, I popped in the new WiFi card and all was well!!!! Hope this helps...

Will this work in an hp envy all in one desktop? current part is hp 802.11 b-g-n wlan pcie hl mini card 573622-001

In theory, yes. However, at least on their laptops, HP has a nasty habit of locking out un-approved WiFi cards by putting a "white list" of allowed cards into the BIOS firmware. On boot-up, any card model not on that list is disabled. I'm not sure if they use this marketing strategy on their all-in-ones. Note that even if the card does work, you will likely have to uninstall the previous card's WiFi drivers and install both new WiFi and new Bluetooth drivers from Intel. Rather than using Windows Update, I suggest going directly to the Intel website for drivers at:http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/intel-wireless-products/intel-wireless-7200-series/intel-dual-band-wireless-ac-7260.html

Brand	Intel
Product Dimensions	1.27 x 1.27 x 1.27 cm; 9.07 g
Item model number	7260.HMW
Manufacturer	Intel
Color	multicolor
Form Factor	Intel
Wireless Type	802.11a/b/g/n/ac
Hardware Platform	PC
Operating System	Windows 7
Are Batteries Included	No
Item Weight	9.07 g

Intel 7260.HMW Dual Band Wireless-AC 7260 Network adapter PCI Express Half Mini Card 802.11 b/a/g/n/ac

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