Instruction: Generate an answer to the question by utilizing the information contained in the document.

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Question: Which is better the PCI adapter or the PCI express adapter? Trying to decide which on to get.
Document: If you've got a desktop with a PCI Express slot, this is the way to go. Plus, it will support 5GHz if I ever decide to get that going. TP-Link sounds like a no-name brand, but they make some of the most stable Wi-Fi stuff out there these days.
I needed to add a wireless connection to my desktop and thought this PCI Express adapter would be better than the Linksys USB adapter I had been using. Installation was easy and as per many recommendations in these reviews, I skipped the company's supplied utilities, using Microsoft networking instead.
If you're convinced that PCI-Express wireless cards are better than USB, please THINK AGAIN!A note: My router is about 20 feet from my desktop computer, with no walls and two wooden doors. I've tried two different routers, both have a similar problem with this wireless adapter.I hope this was helpful for you.Thanks,Jon
The old Rosewill adapter is a USB adapter that can be repositioned because it's connected via a long USB cable, probably giving it much better reception than the TP-LINK, which is stuck behind the PC in a nest of cables.Overall, it's a decent wireless card that's hindered by a few limitations that affects most cards like this. However, if you want solid, no frills, 450Mbps, PCI-Express wireless N card, the TP-LINK is a pretty good choice.
I had to replace the 8 year old linksys PCI adapter in my wife's computer. This seemed to be the most reasonably priced replacement that satisfied my conditions:Used PCI Express 1xSupported Wireless NDidn't lose 75% of it's packets like the old one.It manages to do all three, was easy to get her computer up and running again and has been working for five months now.
What you get & basic specs:Network adapter card, mini cd driver installation disk & an optional low profile bracket for use in very small cases. Two small antennas that screw on the back via RP-SMA type connector. The card supports only 2.4ghz & speeds up to 300mbps. Please note this is a PCI adapter card, not to be confused with a PCI-E or PCI Express adapter.
I was trying to find a internal wireless adapter that would give me a better connection than the USB adapters but i was wrong with this choice
Granted I don't need much for net browsing but when I'm trying to transfer gigs of data to my network storage drives it would get annoying.Now that I'm running at nearly full bandwidth I'm good to go with rather fast transfers around the network now.Keep in mind that if you place the antennas as vertical as possible it will help to increase your range/increase signal strength. As with any antenna the more it is perpendicular to the ground the better the signal transmission will be.
Easy enough to install, drivers were a cinch. Only gave me two bars of connectivity unless I moved my tower way out of it's normal spot. This simply will not do, my dear! Poppycock!How does my laptop get a better connection than this doo-hickey?Returned it and got a Netis 300mbs Wireless N PCI-E Adapter. Works splendid, indeed!
I ended up swapping out the N900 PCI express wifi card from my other computer because this one had a PCI soundcard already installed, using up the single internal PCI slot. In the end this worked out better for me because the N900 is in my older computer which is mostly used for accessing media and printing.So, on the whole, I recommend both products.
Answer: Depends on a few things: number of slots you have for either PCI or PCI express, your personal appeal for the look of your internals, if you are going to need another slot for some other upgrade, and speed. My motherboard only had the PCI Express slot available, so that was my choice. The express generally grants you the higher speeds, but no guarantee if you have an older/slower router.