Compare Detail
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Prime B450M-A II
90MB15Z0-M0AAY0ModelPRIME B550M-A/CSM -
7.1 ChannelsAudio channels7.1 Channels
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Realtek High Definition Audio CODECAudio chipsetRealtek ALC887
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1 x PS/2 keyboard/mouse combo port(s)
1 x DVI-D
1 x D-Sub
1 x HDMI
1 x LAN (RJ45) port(s)
2 x USB 3.2 Gen 2 (teal blue) (2 x Type-A)
4 x USB 3.2 Gen 1 (blue) Type-A
3 x Audio jack(s)
1 x BIOS FlashBack Button(s)Back io ports2 x USB 3.2 Gen 2 ports (2 x Type-A)
4 x USB 3.2 Gen 1 ports (4 x Type-A)
1 x D-Sub port
1 x DVI-D port
1 x HDMI port
1 x Realtek RTL8111H 1Gb Ethernet port
3 x Audio jacks
1 x PS/2 Keyboard/Mouse combo port -
AMD B450ChipsetAMD B550
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NoCrossfire supportNo
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NoEcc ram supportYes
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Micro ATXForm factorMicro ATX
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Realtek RTL8111HLan chipsetRealtek RTL8111H
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2242 / 2260 / 2280 / 22110 - M KeyM2 devices support2242 / 2260 / 2280 / 22110 - M Key
2242 / 2260 / 2280 - M Key -
1M2 ports2
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10/100/1000MbpsMax lan speed10/100/1000Mbps
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128 GBMaximum supported ram128 GB
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2Onboard usb 202
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1Onboard usb 32 gen 11
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1Pci express x16 slots1
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2Pci express x1 slots2
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YesRaid supportYes
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4Ram slots4
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October 2020Release dateJune 2020
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6Sata 6 gbps ports4
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NoSli supportNo
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AM4SocketAM4
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2133Mhz
2400Mhz
2666Mhz
2800Mhz
3000Mhz
3200Mhz
3300Mhz
3400Mhz
3466Mhz
3600Mhz
3733Mhz
3866Mhz
4000Mhz
4400MhzSupported memory2133Mhz
2400Mhz
2666Mhz
2800Mhz
3000Mhz
3200Mhz
3333Mhz
3466Mhz
3600Mhz
3733Mhz
3866Mhz
4000Mhz
4133Mhz
4266Mhz
4400Mhz
4600Mhz -
NoWireless lanNo
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