M6600 Dual Band AC 5Ghz wlan card upgrade?

I wish to upgrade my current wlan card with a new Intel 7260.HMWWBR - Dual Band Wireless-AC 7260 - Network adapter - PCI Express Half Mini Card - 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, Bluetooth 4.0 LE
I have upgraded several machines fine but my M6600 has a 3 pin card instead of a 2 pin. I assume the centre pin on the Dell card is an xtra antenna. I rang their suppot and they said I would have t replace it with a 3 pin. Problem is I cannot seem to source a 3 pin. Any ideas please.

 

If they told you you would have to buy a card with three antenna connectors they were wrong, if they told you you'd have to find an Intel 7260 with three antenna connectors they were just being stupid.
Intel 7260 is a two spatial stream card so it only needs two antennas, there is no 7260 with three antennas. I assume your M6600 had an Intel 6300 installed as default which was indeed a three spatial stream card (hence three antennas needed).

Your initial assumption was correct - you can install Intel 7260 and connect two antennas leaving out the one that was connected as the middle one to your Intel 6300.

 

Haha...thanks very much for that. Dell gave me a UK third party supplier that said "Yes" no problem. It will cost me £54.00 ukp and the part number is M4500. Well that sounds more like a Machine than a Wireless card. So your advice comes well received, I will fit my Intel 7260 (all £11.60s worth of it) and leave out the centre lead which I believe was numbered 3 (TR3). Is that correct. Thanks again..

 

Assuming Dell does not whitelist Wi-Fi cards (sorry, I can never remember if they do) that will work fine.

 

Dell doesn't whitelist wifi cards (at least on Precision). I upgraded my M6700 to an 802.11ac card with no hassle. (It's a Broadcom card, not Intel.) I left out one of the antenna lead connectors as mentioned here.

I will say that, my M6700 came with Bluetooth included as a standalone device, but Bluetooth was also included in the new WiFi card, so I ended up with two Bluetooth controllers. This caused some errors in the device manager, so I ended up just physically removing the one that originally came with the M6700.

 

Which Broadcom card did you install and what is your maximum 802.11ac bandwidth, if I may ask?

 

The card is a generic BCM4352 (got from eBay). Maximum reported connection bandwidth is 867 Mbps, actual throughput is quite a bit lower (as usual for wifi).

 

They don't whitelist, got a generic 6300 in my M6700. You can't use the Del drivers for the wireless card, but that in itself isn't an issue, just use the ones from the manufacturer.