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  1. #1
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    Asus Maximus Extreme XII Z490 - PCI 4 Support with RocketLake-S

    Hi guys,

    i bought this very expensive Motherboard just 7 month ago and i like it, i really would like to keep it but i need to know if it will support PCIX4.0 and 20 Lanes with the RocketLake refresh which will happen shortly.

    I saw a post where Gigabyte statet that they will support PCIX4 on theyre Z490 Boards and as far as i could have read, the cpu mainly needs to support it and the PCIX 16 slot isnt any different so this is only a question of supporting it software (bios) side from Asus.

    Thanks for clearing.

  2. #2
    ROG Guru: Orange Belt Array Saltgrass PC Specs
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    MotherboardMaximus XIII Hero
    Processori9 11900K
    Graphics Card #1EVGA RTX 3090 FTW
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    Storage #1Samsung 980 Pro 2 TB
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    CaseCooler Master
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    Keyboard ASUS Strix Flare
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    I am in the same situation and do believe the PCIe 4 will work with the 11th gen processor.. I already have certain tests I plan to run both before and after the processor upgrade..

  3. #3
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    why is this Forum so badly moderated ... you never get any help from ROG staff or any clear answers. Anyway i got a confirmation from an employee that PCIX4 and 20 Lanes will be available on the Extreme XII with the release of RLS.

  4. #4
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    You will get 16 lines pcie4.

    The DIMM.2 maybe will get 4 lines for ssd nmve but not confirmed.

    Asus did the worst preparing for rocket lake 20 PCIe 4 lines from all brands.

  5. #5
    ROG Guru: Yellow Belt Array Zardoc PC Specs
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    MotherboardASUS ROG Strix Z590-A Gaming WiFi 6 Intel® Z590 LGA 1200 PCIe 4.0
    ProcessorIntel® Core™ i7-11700 Processor 16M Cache, up to 4.90 GHz
    Memory (part number)Corsair Vengeance LPX 32GB (2x8GB) DDR4 3200MHz CL16 Memory Kit - Black (CMK16GX4M2B3200C16)
    Graphics Card #1ASUS Dual GeForce RTX™ 2070 OC edition 8GB GDDR6 Clock 1410 MHz Memory Clock 1750 MHz
    Sound CardOnbard Realtek 4080
    MonitorLG 27UK850-W 27'' 4K UHD IPS
    Storage #1Samsung 980 pro M.2 256 GB Pcie Gen 4.0
    Storage #2Samsung 970 Evo M.2 2280 2tb Pcie Gen3. X4
    CPU CoolerCryorig H7 Tower Cooler For AMD/Intel CPU
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    Quote Originally Posted by mmolletit View Post
    why is this Forum so badly moderated ... you never get any help from ROG staff or any clear answers. Anyway i got a confirmation from an employee that PCIX4 and 20 Lanes will be available on the Extreme XII with the release of RLS.
    Forums are very rarely supported by company staff. Most often they are moderated by users that have lots of experience with the boards and other Asus enthusiasts.

    Help from staff is called a support ticket.

  6. #6
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    So, i got my hands on an 11700k early and testet a few things with the Z490 Extreme.

    1. Update both Bios on the Extreme to 2004 while having the a 10th Gen CPU inside. (it havent worked for me only doing it with one bios only, the mainboard didnt tun on anymore) also tried with flashback.
    2. Update Intel ME from withing a working Windows installation to the latest version mentioned in the forum here, else XMPII havent worked for me.
    3. PCIX4 16 is available for my 3090 when using the 11700k.
    4. Iam not able to use more then 16 Lanes from the CPU, as soon i plug another PCIX 1x Soundcard (STI2) in the second PCIX16 slot the GPU goes down to 8x.
    This could be that Z490 not supporting more then 16lanes from CPU or it havent been implemented from Bios side. Iam not using the DIMM.2 Module ! so these 4 extra lanes seems to be fogotten by the BIOS builder yet.

  7. #7
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    Quote Originally Posted by Zardoc View Post
    Forums are very rarely supported by company staff. Most often they are moderated by users that have lots of experience with the boards and other Asus enthusiasts.

    Help from staff is called a support ticket.
    i like your signature...

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