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  1. #1
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    Technical question about Crosshair VIII Hero and PCIE4

    Hi all,

    I have a technical question about how PCIE 4 works on this board, and the x570 chips in general.

    It is my understanding that the top M2 (M2-1) slot above the graphics card, and the slot the GPU goes into, share direct PCIE lanes to the CPU. While the bottom M2-2 slot has lanes going to the x570 chipset. At the moment, this is my configuration:

    CPU - Ryzen 5 5600x
    GPU - GTX 1070 (I just sold my 2080 ti for an obscene amount on eBay, and will be upgrading to a 6800XT OR 6900XT as soon as I can get one)
    M2-1 - WD Black SN750 1TB PCIE3 NVME Drive
    M2-2 - WD Black SN750 1TB PCIE3 NVME Drive

    I was planning on upgrading BOTH drives to the new WD Black SN850 PCIE4 drives. However, if I do that NOW, with the GTX 1070 in there, will it force the drive in the top M2 Slot to also run at PCIE3 only? Or, are they still independent as to what speed they run at, even though they share lanes.

    I did some searching and can't really find a clear answer, I'd love someone at ASUS to chime in and give me the CORRECT answer.

    Thanks

  2. #2
    ROG Guru: Blue Belt Array RedSector73 PC Specs
    RedSector73 PC Specs
    Laptop (Model)FA506IU-AL130T x 2
    MotherboardROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X 12-Core Processor
    Memory (part number)4 x G.SKILL F4-3800C14D-16GTZN 14-16-16-36 Samsung B-Die
    Graphics Card #1Gigabyte Aorus RTX 2080 Ti Xtreme WaterForce (GV-N208TAORUSX W-11GC)
    Sound CardArctis DAC
    MonitorAsus ROG Swift PG348Q
    Storage #1ADATA SX8200PNP 1TB
    Storage #22 x Samsung SSD 840 EVO 250GB
    CPU CoolerCoolermaster Liquid Pro Master 360
    CaseEVGA DG-87 Gunmetal Grey Gaming Case
    Power SupplyEVGA SuperNOVA G2 750W Gold Power
    Keyboard Corsair K95 RGB Platinum
    Mouse Corsair Gaming Sabre RGB Gaming Mouse
    Headset ARCTIS Pro Wireless
    Mouse Pad Cooler Master MP750 RGB Cloth Gaming Mouse Pad Extra Large
    OS Windows 10 64bit Pro
    Network RouterRT-AC87U

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    None drop down PCIE Gen 3.0 from Gen 4.0

    This is how the layout of Hero works
    https://www.techpowerup.com/img/x5IOE9hplxgQwNWM.jpg

    Might find this helpful as it appears you are getting B550 or A520 implementation confused with X570
    https://www.gamersnexus.net/news-pc/...mparison-specs
    Last edited by RedSector73; 11-12-2020 at 11:32 PM.

  3. #3
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    Quote Originally Posted by RedSector73 View Post
    None drop down PCIE Gen 3.0 from Gen 4.0

    This is how the layout of Hero works
    https://www.techpowerup.com/img/x5IOE9hplxgQwNWM.jpg

    Might find this helpful as it appears you are getting B550 or A520 implementation confused with X570
    https://www.gamersnexus.net/news-pc/...mparison-specs
    I have seen the chart you linked above, but this is directly from the Crosshair VIII Hero's spec page:


    1 x M.2_1 socket 3, with M Key, Type 2242/2260/2280 (PCIE 4.0 x4 and SATA modes) storage devices support
    1 x M.2_1 socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)

    AMD X570 chipset :
    1 x M.2_2 socket 3, with M Key, Type 2242/2260/2280/22110(PCIE 4.0 x4 and SATA modes) storage devices support
    8 x SATA 6Gb/s port(s),
    Support Raid 0, 1, 10
    AMD Ryzenâ„¢ 5000 Series/ 3000 Series Desktop Processors :
    AMD RyzenTM 4000 G-Series / 3000 G-Series / 2000 Series / 2000 G-Series Processors :

    It lists the M2.2 slot under the chipset section, aside from the label in the manual of M2_2 for the lower slot, it's also the only one supporting 22110.
    So, you're saying Asus's spec page is wrong?

  4. #4
    New ROGer Array vince77 PC Specs
    vince77 PC Specs
    Laptop (Model)Dell XPS 13 9360
    MotherboardASUS ROG X570 Crosshair VIII Hero (Wi-Fi)
    ProcessorAMD Ryzen 9 3900XT
    Memory (part number)G.SKILL Ripjaws V Series 128GB (4 x 32GB) DDR4 3600 CL16-22-22-42 1.45v
    Graphics Card #1ASUS Dual AMD Radeon RX 5600 XT EVO Top Edition DUAL-RX5600XT-T6G-EVO
    Storage #1Samsung 980 Pro 1 TB M.2-2280 NVME Solid State Drive
    CPU Coolerbe quiet! BW008 Pure Loop 360mm All-in-One Water Cooling System
    Casebe quiet! SILENT BASE 802 White Window
    Power Supplybe quiet! Dark Power Pro 12 1200W, BN646, 80 Plus Titanium Efficiency, Power Supply, ATX
    OS Window 10 Pro 64-bit
    Accessory #1 Asus TPM-M R2.0 14-1 Pin TPM Module

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    Not sure if this helps but page 1-8 of user manual shows that for 3rd Gen Ryzen processors with single GPU

    PCIe x16_1 GPU x16 (PCIe 4.0)
    M2_1 (PCIe mode) x4 (PCIe 4.0)
    M2_2 (PCIe mode) x4 (PCIe 4.0)

    As already posted "None drop down PCIE Gen 3.0 from Gen 4.0".

  5. #5
    ROG Guru: Blue Belt Array RedSector73 PC Specs
    RedSector73 PC Specs
    Laptop (Model)FA506IU-AL130T x 2
    MotherboardROG CROSSHAIR VIII HERO (WI-FI)
    ProcessorAMD Ryzen 9 3900X 12-Core Processor
    Memory (part number)4 x G.SKILL F4-3800C14D-16GTZN 14-16-16-36 Samsung B-Die
    Graphics Card #1Gigabyte Aorus RTX 2080 Ti Xtreme WaterForce (GV-N208TAORUSX W-11GC)
    Sound CardArctis DAC
    MonitorAsus ROG Swift PG348Q
    Storage #1ADATA SX8200PNP 1TB
    Storage #22 x Samsung SSD 840 EVO 250GB
    CPU CoolerCoolermaster Liquid Pro Master 360
    CaseEVGA DG-87 Gunmetal Grey Gaming Case
    Power SupplyEVGA SuperNOVA G2 750W Gold Power
    Keyboard Corsair K95 RGB Platinum
    Mouse Corsair Gaming Sabre RGB Gaming Mouse
    Headset ARCTIS Pro Wireless
    Mouse Pad Cooler Master MP750 RGB Cloth Gaming Mouse Pad Extra Large
    OS Windows 10 64bit Pro
    Network RouterRT-AC87U

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    Quote Originally Posted by njbongo View Post
    So, you're saying Asus's spec page is wrong?
    I'm not in conflict with Asus webpage you quoted. I am unsure of your question.

  6. #6
    New ROGer Array Ziggiesden PC Specs
    Ziggiesden PC Specs
    Laptop (Model)Alienware Area51-m i9 10900K 64GB 4TB (RAID 0)
    MotherboardASUS ROG Crosshair VIII Hero & Formula
    Processor2*AMD Ryzen 9 3950X Processor @4.315Ghz
    Memory (part number)Corsair Vengeance LPX 64@4000Mhz
    Graphics Card #1Asus TUF 3090 OC 24GB
    Graphics Card #2EVGA GeForce RTX 2080 Super XC Ultra (Overclocked)
    Graphics Card #3NITRO+ RADEON RX 5700 XT SP ED
    Graphics Card #4Sapphire Nitro+ Radeon RX 5700 XT 8G, 8192 MB
    Monitor2* 55 Inch Samsung Curved TV's 4K
    Storage #12*Sabrent 1TB Rocket Nvme PCIe 4.0 M.2 2280
    Storage #27*Samsung 860 QVO 1 TB SATA 2.5 Inch Internal Solid State Drive (SSD)
    CPU CoolerNZXT Kraken X62 280mm
    CaseFractal Design Meshify C
    Power SupplyCorsair AX1600i / BeQuiet 1000 W Dark Pro 11
    Keyboard Logitech K540
    Mouse Logitech M310
    Headset Sades
    Mouse Pad Gargoyles
    Headset/Speakers 2*Q60T
    OS Windows 10 Enterprise
    Network RouterZyxel
    Accessory #1 LSI MegaRAID SAS 9271-8i 1GB DDRIII 8 Port 6Gbps PCIe 3.0 SATA SAS RAID Controller Kit

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    Hero VIII & PCIE 4

    I'm running AMD Ryzen 9 3950X Processor @4.315Gh with two Sabrent PCIE4 drives they benchmark at full speed.

    I have the same setup running on a Formula Board too.

    Yes, I too am looking to upgrade to those drives - it will be interesting to see what they do in RAID 0. My benchmarks:

    ------------------------------------------------------------------------------
    CrystalDiskMark 7.0.0 x64 (C) 2007-2019 hiyohiyo
    Crystal Dew World: https://crystalmark.info/
    ------------------------------------------------------------------------------
    * MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
    * KB = 1000 bytes, KiB = 1024 bytes

    [Read]
    Sequential 1MiB (Q= 8, T= 1): 9349.954 MB/s [ 8916.8 IOPS] < 896.38 us>
    Sequential 1MiB (Q= 1, T= 1): 3219.985 MB/s [ 3070.8 IOPS] < 325.44 us>
    Random 4KiB (Q= 32, T=16): 1062.596 MB/s [ 259422.9 IOPS] < 1967.29 us>
    Random 4KiB (Q= 1, T= 1): 59.960 MB/s [ 14638.7 IOPS] < 68.20 us>

    [Write]
    Sequential 1MiB (Q= 8, T= 1): 8272.714 MB/s [ 7889.5 IOPS] < 1011.76 us>
    Sequential 1MiB (Q= 1, T= 1): 7281.084 MB/s [ 6943.8 IOPS] < 143.85 us>
    Random 4KiB (Q= 32, T=16): 854.580 MB/s [ 208637.7 IOPS] < 2438.50 us>
    Random 4KiB (Q= 1, T= 1): 266.757 MB/s [ 65126.2 IOPS] < 15.24 us>

    Profile: Default
    Test: 1 GiB (x5) [Interval: 5 sec] <DefaultAffinity=DISABLED>
    Date: 2020/07/16 19:48:11
    OS: Windows 10 Enterprise [10.0 Build 19041] (x64)




    QUOTE=njbongo;819502]Hi all,

    I have a technical question about how PCIE 4 works on this board, and the x570 chips in general.

    It is my understanding that the top M2 (M2-1) slot above the graphics card, and the slot the GPU goes into, share direct PCIE lanes to the CPU. While the bottom M2-2 slot has lanes going to the x570 chipset. At the moment, this is my configuration:

    CPU - Ryzen 5 5600x
    GPU - GTX 1070 (I just sold my 2080 ti for an obscene amount on eBay, and will be upgrading to a 6800XT OR 6900XT as soon as I can get one)
    M2-1 - WD Black SN750 1TB PCIE3 NVME Drive
    M2-2 - WD Black SN750 1TB PCIE3 NVME Drive

    I was planning on upgrading BOTH drives to the new WD Black SN850 PCIE4 drives. However, if I do that NOW, with the GTX 1070 in there, will it force the drive in the top M2 Slot to also run at PCIE3 only? Or, are they still independent as to what speed they run at, even though they share lanes.

    I did some searching and can't really find a clear answer, I'd love someone at ASUS to chime in and give me the CORRECT answer.

    Thanks[/QUOTE]

  7. #7
    ROG Guru: Brown Belt Array mdzcpa PC Specs
    mdzcpa PC Specs
    MotherboardCrosshair VIII Dark Hero
    Processor5900X 4.6ghz All core 1.3V, 5ghz single DOC
    Memory (part number)Gskill NEO 3600 CAS 14 32GB (4x8)
    Graphics Card #1ROG Strix RTX 3080
    Sound CardOn Board
    MonitorROG PG348Q
    Storage #1Samsung 980 Pro M.2 512GB for OS & APPS
    Storage #2Samsung 980 Pro M.2 1TB for GAMES
    CPU CoolerROG Ryujin 360
    CasePhanteks 500A Mesh
    Power SupplySeasonic Prime 1000W Titanium
    Keyboard Corsair K70 LUX RGB
    Mouse Corsair M65 RGB
    Headset Corsaur Virtuoso
    Mouse Pad Corsair MM300 Wide Desk Mat
    OS WIN 10 Pro
    Network RouterLinksys VELOP
    Accessory #1 ROG 751JY Laptop for Moobile Gaming
    Accessory #2 Koolance EXC-800 Chiller
    Accessory #3 25+ years of overclocking

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    NVME PCIE is independent. The PCIE 16_1 will run on GEN 3 with your 1070, and both NVME will run at GEN 4 if you put GEN 4 M.2 drives in there.

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