Compare Detail
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X299 Steel Legend
90-MXBBJ0-A0UAYZModelROG Crosshair VIII Hero (WI-FI) -
7.1 ChannelsAudio channels8 Channels
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Realtek ALC1220Audio chipsetROG SupremeFX High Definition Audio CODEC
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1 x PS/2 Mouse/Keyboard Port
1 x Optical SPDIF Out Port
4 x USB 2.0 Ports (Supports ESD Protection)
1 x USB 3.2 Gen2x2 Type-C Port (20Gb/s) (ASMedia ASM3242) (Supports ESD Protection)
3 x USB 3.2 Gen1 Ports (Supports ESD Protection)
2 x RJ-45 LAN Ports with LED (ACT/LINK LED and SPEED LED)
1 x Clear CMOS Button
HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks)Back io ports1 x Optical S/PDIF out
1 x Clear CMOS button(s)
1 x USB BIOS Flashback Button(s)
1 x ASUS Wi-Fi Module
1 x Anti-surge 2.5G LAN (RJ45) port
Anti-surge LAN (RJ45) port
5 x Gold-plated audio jacks
4 x USB 3.2 Gen 1 (up to 5Gbps) ports
8 x USB 3.2 Gen 2 (up to 10Gbps) ports -
Intel X299ChipsetAMD X570
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YesCrossfire supportYes
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NoEcc ram supportYes
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ATXForm factorATX
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Intel I219-VLan chipsetRealtek RTL8125-CG
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2242 / 2260 / 2280 / 22110 - M Key
2260 / 2280 - M Key
2230 - E KeyM2 devices support2242 / 2260 / 2280 - M Key
2242 / 2260 / 2280 / 22110 - M Key -
3M2 ports2
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Dual 10/100/1000MbpsMax lan speed10/100/1000/2500Mbps + 10/100/1000Mbps
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256 GBMaximum supported ram128 GB
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2Onboard usb 202
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1Onboard usb 32 gen 11
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1Onboard usb 32 gen 21
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4Pci express x16 slots3
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1Pci express x1 slots1
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YesRaid supportYes
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8Ram slots4
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January 2020Release dateJuly 2019
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8Sata 6 gbps ports8
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YesSli supportYes
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LGA2066SocketAM4
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2133Mhz
2400Mhz
2666Mhz
2800Mhz
2933Mhz
3200Mhz
3600Mhz
3733Mhz
3800Mhz
4000MhzSupported memory2133Mhz
2400Mhz
2666Mhz
2800Mhz
2933Mhz
3000Mhz
3200Mhz
3466Mhz
3600Mhz
3733Mhz
3866Mhz
4000Mhz
4133Mhz
4266Mhz
4400Mhz
4533Mhz
4600Mhz -
NoWireless lanYes
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