On 09/30/2018 11:14 AM, Matt B wrote:
Hi,
One thing I just noticed about the page: https://www.coreboot.org/Board:asus/kgpe-d16
Here "Crossfire XDMA" is listed as needing testing.
I added that table.
If nobody has been able to test this, and you (or someone else) has the opportunity this might be an interesting thing to test.
It is simply PCI-e P2P DMA nothing special so I see no reason why it shouldn't work.
I don't have the money/need for a second RX580 so I can't test it.
If you want to play games the G34 6328 is what you want, or if you get a KCMA-D8 the C32 4386 - the piledriver cpus are faster than the bulldozer ones.
After learning that this board can take a more modern CPU (family 15h) I'm now considering it more strongly for a future computer. My K10 box is *currently* mitigated against Spectre V2 (IBP disabled under CentOS via a chicken bit) but I don't think it's wise to expect further mitigations to be forthcoming from AMD should more bugs rear their ugly head. Moving up to a family 15h CPU means getting updated Spectre V2-mitigating microcode and a much more realistic expectation of support in the immediate future. I'll probably even move up to piledriver (like the G505s I'm currently working on), since a microcode patch will also fix the NMI issue (and I'll be applying one to the stock microcode anyway).
I'd be really interested to learn if Crossfire and other features of modern cards work on these older boards under coreboot, since they may come in REALLY handy when running any machine learning loads on these boards.
Like I said it works fine - you can have a total of 2 dual width cards or 4 single width PCI-e cards plus the PIKE HBA/RAID slot which is actually just a PCI-e x4 reversed slot on the data side (the longer side is the ports fan-out)
Of course I would suggest you instead purchase a TALOS 2 as it would be faster, less expensive and give you much more options. Obviously you can't play x86 games on one but folks have already ported a few foss indie games to POWER and unreal engine has a demo.
Note the lite version has only two pci-e slots and the recc'ed regular talos 2 must have dual cpus for all the slots to be used so dual 4 core is better than one 8 core.
Arguably the most impressive TALOS 2 home setup yet :D
https://wiki.raptorcs.com/wiki/User:JSharp#T2.2Fx86_FSC_Heterogeneous_Cluste...
As always if you require more PCI-e slots on a single board for whatever reason you can purchase a PCI-e expansion system from cyclone microsystems, of course one should consider their uplink requirements (and get at least pci-e 2.0 x16 uplink) although for P2P and VM assignment the onboard PCI-e switch supports ACS so there is no issue there. They appear on fleabay now and again and seem to be made in usa just like the talos 2!
On another note, does anyone have a favorite PSU for these boards?
I recommend something from seasonic they seem to make the best stuff these days.
Preferably something that will last a bit longer than crappy consumer gear? This thing already requires two 8-pin connectors for a dual CPU setup, and graphics cards demand them now too.
The PCI-e power connector is different and not compatible be careful when you hook up your stuff!
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