Compare Detail
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X299 Steel Legend
90-MXBBJ0-A0UAYZModelZ490 Steel Legend
90-MXBC10-A0UAYZ -
7.1 ChannelsAudio channels7.1 Channels
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Realtek ALC1220Audio chipsetRealtek ALC1200
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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 ports2 x Antenna Ports
1 x PS/2 Mouse/Keyboard Port
1 x HDMI Port
1 x DisplayPort 1.4
1 x Optical SPDIF Out Port
2 x USB 2.0 Ports (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-A Port (10Gb/s) (ReDriver) (Supports ESD Protection)
1 x USB 3.2 Gen2 Type-C Port (10Gb/s) (ReDriver) (Supports ESD Protection)
2 x USB 3.2 Gen1 Ports (Intel® Z490) (Supports ESD Protection)
* Ultra USB Power is supported on USB3_12 ports.
* ACPI wake-up function is not supported on USB3_12 ports.
1 x RJ-45 LAN Port with LED (ACT/LINK LED and SPEED LED)
HD Audio Jacks: Rear Speaker / Central / Bass / Line in / Front Speaker / Microphone (Gold Audio Jacks) -
Intel X299ChipsetIntel Z490
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YesCrossfire supportYes
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NoEcc ram supportNo
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ATXForm factorATX
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Intel I219-VLan chipsetDragon RTL8125BG
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2242 / 2260 / 2280 / 22110 - M Key
2260 / 2280 - M Key
2230 - E KeyM2 devices support2260 / 2280 - M Key
2260 / 2280 / 22110 - M Key
2230 - E Key -
3M2 ports3
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Dual 10/100/1000MbpsMax lan speed10/100/1000/2500Mbps
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256 GBMaximum supported ram128GB
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2Onboard usb 202
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1Onboard usb 32 gen 12
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1Onboard usb 32 gen 21
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4Pci express x16 slots2
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1Pci express x1 slots3
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YesRaid supportYes
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8Ram slots4
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January 2020Release dateMay 2020
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8Sata 6 gbps ports6
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YesSli supportNo
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LGA2066SocketLGA1200
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2133Mhz
2400Mhz
2666Mhz
2800Mhz
2933Mhz
3200Mhz
3600Mhz
3733Mhz
3800Mhz
4000MhzSupported memory2133Mhz
2400Mhz
2666Mhz
2800Mhz
2933Mhz
3200Mhz
3600Mhz
3733Mhz
3800Mhz
3866Mhz
4000Mhz
4133Mhz
4266Mhz -
NoWireless lanNo
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