Wireless Bandwidth?

[ninja1eye]

I've just finished building my new gaming PC, only to discover after installing Windows 7; that my motherboard (an Asus P8Z77 V-LX)doesn't actually have a way to connect to wireless broadband (I REALLY should have checked the information I saw on a forum, I know ).
So now I'm having to buy a wireless adapter, and I'm wondering: how much of a difference is there between 150, 300 and 450 Gbps bandwidth?

150Gbps (£9)- http://www.amazon.co.uk/TP-Link-TL-WN781ND-150Mbps-Wireless-Express/dp/B0036AFAEW/ref=sr_1_1?ie=UTF8&qid=1356128151&sr=8-1

300Gbps (£14)- http://www.amazon.co.uk/TL-WN881ND-300Mbps-Wireless-Express-Adapter/dp/B006BSPTAQ/ref=sr_1_7?ie=UTF8&qid=1356120730&sr=8-7

450Gbps (£25)- http://www.amazon.co.uk/TL-WDN4800-450Mbps-Wireless-Express-Adapter/dp/B006PMX964/ref=sr_1_fkmr0_1?s=computers&ie=UTF8&qid=1356128300&sr=1-1-fkmr0

According to my service provider, I'm averaging at around 9.0Mb.
I'd rather buy one of the cheaper cards, but if there are big differences in speeds, then I'll definitely go for the better card. Also, if these aren't very good cards for their price, could you please recommend others? (preferably from Amazon.co.uk)
I really know nothing about the topic, so any help would be much appreciated

 

[noidea_77]

First you need to check your wireless router. If it only support 54Mbps (it's Mbps, not Gbps by the way) then you are limited to that anyway. The standard it supports is described like that: IEEE 802.11a/b/g/n.

 

[suteck]

The parts you linked to are actually speed in Mbps, so, If you are only using around 9 Mbps and don't plan on upgrading your internet plan as long as you are using that computer then you only need the TP-Link TL-WN781ND 150Mbps Wireless PCI Express Adapter. Do you know what speed the internet service actually provides to you? Like are you paying for a 10 Mbps speed? Or are you paying for a 50 Mbps and only using 9 with your current wireless router? The easy way to check even with a wire, is to use
Speed test - http://www.speedtest.net/ - just go there and see what speed you are getting and base your purchase on that. But, either way, unless you're paying for extremely fast speed the 150Mbps card should be fine. The only other consideration is if you have a home server that you use for storage or movies and you link your system wirelessly, then you will want the fastest you can get since then that card will be your limiting factor on your computer.

 

[ninja1eye]

Well according to the speed test, it gave me a download speed of only 4.35Mbps and an upload one of 0.87Mbps.
So, any of those should allow me to us the maximum speed by the looks of it. I'll probably try and get the 300Mbps as there's supposedly going to be a broadband upgrade in the future.
Thanks for the help everyone. XD