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5Ghz not working BCM94360CD and slow ping

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Apr 9, 2012
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Motherboard
Gigabyte GA-Z68X-UD3H-B3
CPU
Intel i7-2600K
Graphics
NVIDIA GTX 760
Mac
  1. iMac
  2. Mac Pro
Mobile Phone
  1. Android
  2. iOS
I have the BCM94360CD card installed. Under Sierra 10.12.4, 5Ghz ac networks do not work. Occasionally the 5Ghz wifi network will appear in System Preferences but the mac is unable to connect to it. I cannot seem to connect to the 5Ghz network in Windows either so I don't know if this is a hardware issue. But seeing as my Macbook Pro can connect to the 5Ghz network, this card should work for both OSes. Handoff and bluetooth work out of the box.

Under system Information, WiFi
Card Type: AirPort Extreme (0x14E4, 0x111)
Firmware Version: Broadcom BCM43xx 1.0 (7.21.171.124.1a2)
Locale: ETSI
Country Code: X3
Supported PHY Modes: 802.11 a/b/g/n/ac
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161
Wake On Wireless: Supported
AirDrop: Supported
AirDrop Channel: 44
Auto Unlock: Supported
Status: Connected

However, the card doesn't appear under PCI. Instead, Realtek Ethernet is listed as a PCI card even though it is part of the motherboard. Though I suspect this is not an issue?

Any help would be appreciated. Thank you.
 
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