It was ironic.
Now AMD is moving to 870 mainboards in the consumer segment, will there also be new server/WS AM5 boards to replace the P650, or will they stay?
The SM has bifurcation, but only two M.2 slots and is matx. Its 450€.
https://www.newegg.com/p/pl?N=100007629%20601443020
https://www.supermicro.com/en/products/motherboard/h13sae-mf
Well, X870 only have a few advantages over X670 (and B650):
X870E compared to X670E:
- X870 has guaranteed minimum PCIe 4.0 lanes and guaranteed 24 5.0 lanes available
- Guaranteed USB 4.0 support
X870 vs B650:
- X870 has guaranteed minimum PCIe 4.0 lanes and guaranteed 24 5.0 lanes available
- Guaranteed USB 4.0 support
X870 vs X670:
- Like X870 vs B650, plus…
- 12 PCIe 4.0 lanes, as opposed to 20 on the X670
- Half the amount of USB ports and SATA ports
That’s it 
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Thx.
Er, pretty much 5x16+5x4 available of the CPU’s 5x28. An ASM4242 and Promontory 21 take the other eight in all mobos I’ve checked which are documented to that level of detail. A Promontory 21’s 4x8+3x4 available so PCIe 4.0’s not a guaranteed minimum.
X670’s the 4x12+3x8 available of dual Promontory 21 (4x24+3x8 total counting uplinks). Since X870’s single Promontory 21, yes, there’s a halving of potential chipset USB and PCIe 3.0/SATA. But there are noticeable variations in what boards choose to bring out. The overall USB change is usually less due to CPU attached USB.
It is if you want to call it an 870. Otherwise you are violating the brand rules.
AMD publishes no such requirement, if anything the topic’s avoided on their chipset page and feature table. All four major manufacturers offer X870(E) boards with user accessible 3.0 lanes:
- ASRock X870E Nova: 3x2 slot + 3x2 M.2
- ASRock X870 Pro RS: 3x4 M.2
- Asus Prime X870-P: 3x2 M.2
- Gigabyte X870E Aorus Master: 3x4 slot
- Gigabyte X870E Aorus Elite: 3x4 slot
- Gigabyte X870E Aorus Pro (Ice): 3x4 slot
- Gigabyte X870 Aorus Elite (Ice, WiFi 7): 3x2 slot
- Gigabyte X870 Gaming (WiFi 6+7): two 3x1 slots
- Gigabyte X870 Eagle: two 3x1 slots
- MSI X870 Tomahawk: 3x1 slot
Checking M.2 WiFi connections and looking at Biostar and others would probably turn up a few more.
More generally, it’d weird if AMD told their board partners they’d have to put B850 on boards using 3.0 lanes for SATA, NICs, USB gen 1, and WiFi 6 as such lower bandwidth connectivity’s mainly what the lanes are for. Same approach’s used with the Z890’s 3x8.
The issue, and I can see that is shared with others looking for an AM5 motherboard for a home server, is to find a reasonably priced motherboard with enough connectivity to keep it relevent for longer: 2 16/0 8/8 slots bifurcation, and 2 or more 4x 4.0 pcie, and say 2 5.0 x4 & 2 4.0 x4 m.2 slots that are reasonably priced. The lowest I have seen is 400€ and then 210€ for a 7700 or similar CPU. Had the motherboard been available at 300€ or lower, I would likely have pulled the trigger already. Now it is mostly meh.
Or is there someone I have missed?