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X299 Big Sur Support

Joined
Sep 30, 2020
Messages
210
Motherboard
Asus Prime X299-DELUXE
CPU
i9-7980XE
Graphics
RX 6900XT
Hey Everybody, I saw this in the BIOS Setup list:

5.) /Advanced/System Agent Configuration/
a.) Intel VT for Directed I/O (VT-d): Disabled/Enabled

So, am I supposed to pick Disabled or Enabled? I just left it on Enabled.

Any help would be appreciated. Thanks again, guys!
 
Last edited:
Joined
Dec 31, 2013
Messages
796
Motherboard
Huawei Matebook D
CPU
i5-8250U
Graphics
UHD 620
Mobile Phone
  1. iOS
Hi all,

I have a question about X299 motherboards.
As of today which is the best option as X299 motherboard?
Is the Gigabyte x299x Designare 10g rev 1 a viable option or not?

Thanks a lot.
 
Joined
Jan 29, 2011
Messages
94
Motherboard
Asus WS X299 Sage 10G
CPU
i9-7980XE
Graphics
RX 580
Mac
  1. Mac mini
Mobile Phone
  1. iOS
Hey Everybody, I saw this in the BIOS Setup list:

5.) /Advanced/System Agent Configuration/
a.) Intel VT for Directed I/O (VT-d): Disabled/Enabled

So, am I supposed to pick Disabled or Enabled? I just left it on Enabled.

Any help would be appreciated. Thanks again, guys!
Intel VT-d can be enabled in the bios if the OC quirk DisableIoMapper is set to True.
 
Joined
Jan 29, 2011
Messages
94
Motherboard
Asus WS X299 Sage 10G
CPU
i9-7980XE
Graphics
RX 580
Mac
  1. Mac mini
Mobile Phone
  1. iOS
Hi all,

I have a question about X299 motherboards.
As of today which is the best option as X299 motherboard?
Is the Gigabyte x299x Designare 10g rev 1 a viable option or not?

Thanks a lot.
I changed my board to a Asus Sage x299 10G because it had NVRAM support. I'd look for a board that has this ... just makes life so much easier.
 
Joined
Dec 31, 2013
Messages
796
Motherboard
Huawei Matebook D
CPU
i5-8250U
Graphics
UHD 620
Mobile Phone
  1. iOS
I changed my board to a Asus Sage x299 10G because it had NVRAM support. I'd look for a board that has this ... just makes life so much easier.
I did use once the Asus Sage x299 NON 10G model. Great board.
BUT it has one ridiculous flaw. No USB 2.0 internal header for the broadcom native bluetooth. I had to connect it through some funny internal hub or routing external USB 2.0 ports.
Does the 2 x 10G Ethernet works well?
It also doesn't have integrated Thunderbolt 3.

How about the PRIME X299-DELUXE II?
- Does Thunderbolt 3 work well?
- Does the Aquantia 5Gbps LAN work well?
- Does the integrated Intel WiFi work well replacing the broadcom?
 
Joined
Sep 30, 2020
Messages
210
Motherboard
Asus Prime X299-DELUXE
CPU
i9-7980XE
Graphics
RX 6900XT
Intel VT-d can be enabled in the bios if the OC quirk DisableIoMapper is set to True.
Thank you. Forgive my ignorance, where would I find the "OC quirk DisableIoMapper" to change it to "True?"
 
Last edited:
Joined
Sep 30, 2020
Messages
210
Motherboard
Asus Prime X299-DELUXE
CPU
i9-7980XE
Graphics
RX 6900XT
Well, After installing the 6900 XT, I'm experiencing issues with startup as it's constantly giving me:

CODE: 20 Detect Memory

Now I know I don't have any issues with my memory, as it's been working fine before. So does anybody know what the issue might be? Could it be a BIOS setting that isn't set correctly? I've tested out each stick of memory on my identical backup system and every stick of RAM is working just fine.

In the meantime, I have to force shut it down and restart and then exit BIOS without saving to get it to start up properly each and every time. I hope there is a way around this. Any help would be appreciated. Thanks
 
Last edited:

trs96

Moderator
Joined
Jul 30, 2012
Messages
23,310
Motherboard
GA-Z97X-UD3H-BK
CPU
i5-4690K
Graphics
HD4600 / RX 570
Mac
  1. MacBook Pro
  2. Mac mini
Mobile Phone
  1. Android
Thank you. Forgive my ignorance, where would I find the "OC quirk DisableIoMapper" to change it to "True?"
set: Kernel -> Quirks -> DisableIoMapper to True in your OpenCore config.plist.
 
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