Wifi USB adapter vs Wireless Card PCIe (June,2015)

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MujtabaBaloch

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Jun 18, 2015
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Hi everyone i searched about this topic but can't find one ,, which i found are too old , so tell me which one is better and faster now a days! thanku
 
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There is no real clear answer to this. USB port speed is no longer a issue.

PCI cards can have better antenna and more antenna easier. They also tend to always transmit at maximum power level where some USB device do not because they are designed to conserve power on portable devices.

USB is much simpler to locate away from the machine, simple usb extension cable. The key problem with PCI cards is those nice antenna are located very close to a metal case that blocks a lot of signals. If you put the machine under a desk against a wall which is common location for desktops you block you antenna off in most directions. It is very expensive to extend the antenna away from the case without lots of signal loss.

There are USB devices...
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bill001g

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Aug 9, 2012
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There is no real clear answer to this. USB port speed is no longer a issue.

PCI cards can have better antenna and more antenna easier. They also tend to always transmit at maximum power level where some USB device do not because they are designed to conserve power on portable devices.

USB is much simpler to locate away from the machine, simple usb extension cable. The key problem with PCI cards is those nice antenna are located very close to a metal case that blocks a lot of signals. If you put the machine under a desk against a wall which is common location for desktops you block you antenna off in most directions. It is very expensive to extend the antenna away from the case without lots of signal loss.

There are USB devices that have multiple antenna and long cords to start with so you can't even say pci always has more antenna.

In locations where you can face the antenna toward the router the PCI card will likely be faster assuming you buy one with 3 or more antenna.

Which is better is mostly going to depend on your particular installation much more than the devices technical specs.
 
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BSOD BSTD

BSOD BSTD

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Nov 21, 2013
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agreed. I run 2 RP-SMA cables as an extension to get the antennas out of my room (I'm upstairs from the router). As you seem to know a lot about this stuff, do you know if long RP-SMA cables can weaken the signal? mine are 3m long.

ps. sorry OP for hijacking thread
 
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bill001g

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It will weaken it how much depends on many variables. Each connection also drops the signal a bit. You can look the loss up in the tables but the first challenge is to figure out which microwave cable they use. Many times they are using the very thin LMR-195 which has 30db of loss at 100ft on the 5g band. At 10ft you would get at least 3db of loss plus a little more. Many of the antenna you get with a router are only 3 db so in effect you have removed the antenna from the router. You need to get 3db more signal at the new location to make up for this loss.

More expensive cable like LMR-600 would only lose 7db at 100ft but it is more than 1/2 inch around and costs about $3.00/ft plus the cost of the ends.
 
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