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I have an Acer Aspire 5742z-4200, and it came with a draft 802.11n mini PCI-E card. I haven't needed much in the way of transfer speed out of the machine most of the time I've owned it, but now I suddenly do.
I've purchased two Inetl 802.11 b/g/n/ac cards, assuming that PCI-E was a standard slot, and one card would work just like the next, but with different capabilities. That seems not to bethe case. After installing each, the PC has booted phenomenally slowly, but was able to load drivers, connec tot networks and even transfer files at blazing speed, compared to my 802.11g connection. But overall the laptop is way too slow to use.
A little Googling introduced me to the term "hardware whitelist". I imagine it's also possible voltages, bus frequency or anything else involved could be incompatible. The PC works fine with the old card in it, so I don't think I've damaged anything. Does anybody know what I need to do to upgrade the WLAN card in my laptop? Am I relegated to getting a USB adapter?
Thanks for your help!