Radeon RDNA3 support?

[Hasturtium]

Anybody stepped up to the plate and tried an RDNA3 card with Power yet? Wondering if the RX 7600 or higher would work with a recent kernel.

[power9mm]

also wondering.

[MPC7500]

Yesterday someone on the Talos IRC reported that he runs a RX 7600 successfully on Fedora 39.
I guess, the same kernel requirements as RDNA2 (Kernel 6.1+). Not sure though.

[MauryG5]

We need to understand what exactly is needed to make it work properly. In recent times they have made several AMD driver updates, to understand if very recent firmware is needed, which versions of Mesa drivers are necessary. I would like to mount a Radeon Pro 7700 rdna 3 for example...

[Borley]

I have read recently that newer AMD GPUs include a version of PSP. Can this be verified? It is everything dating back to Polaris?

[lepidotos]

I've heard the same too, that it's had it since Vega -- but that it needs PSP or ME on the CPU side too to be effective.
Would anyone happen to know the max length a card can be, and if a 2.25 slot card might fit without blocking the second PCIe slot? Seems like all the RX 7000s are over 2 slots tall besides some of the base 7600s and presumably the 7500s. I'm still unsure of whether or not to go for a 7600 (XT), 7700 XT, W6600, or maybe W6800.

[MauryG5]

I personally can tell you that if you have a Blackbird and you have to use both PCI express slots, you must necessarily use up to a maximum of 2 slots, otherwise you won't be able to use the second slot.  Unfortunately, the new Radeons are almost all 2.5 and therefore you can't use them.  That's why I was thinking that if there was a possibility, get a 7700 pro that uses 2 slots, even if it costs a lot more unfortunately being pro.  I use the 8 PIN slot for the sound card so I'm one of those who necessarily needs to use 2-slot graphics cards and no more.

[MPC7500]

Indeed. Unfortunately, only 7600s are currently available as dual slot cards. Starts at 280€ (Germany).
Then there are the Pro cards (W7500 - W7800) as single and dual slot. Start at approx. 450€.
However, these are not any faster than the consumer cards.

[Borley]

I've heard the same too, that it's had it since Vega -- but that it needs PSP or ME on the CPU side too to be effective.

Do you know where I might find literature on this? In what way does it attempt to link to the CPU PSP?

[lepidotos]

Whoops, meant to reply.

I went looking for it again, but couldn't find it -- it was just a Reddit post, so grains of salt anyway. I imagine it had some basis in fact, most of this kind of stuff is, but I certainly couldn't verify it myself.

[Woof]

If anyone near Basel wants to give it a try, we’ve a selection of W7x00 Pro cards at work, I just don’t have a full running P9 machine right now.

[power9mm]

so any updates to this? my next POWER system i'd like to use one of the new single slot pro w7600s

[MPC7500]

Yesterday someone on the Talos IRC reported that he runs a RX 7600 successfully on Fedora 39.

[Hasturtium]

General consensus I've seen is that the groundwork for RDNA3 support was laid alongside the RDNA2 fixes landing. I can say that the single slot Radeon Pro W6600 I snagged a while back has not given me a single burp or hitch since I installed it, and the single slot W5500 before that was also fine prior to a weird kernel regression around ~5.17, which I believe was sorted out a bit later.

[MPC7500]

Two RDNA3 cards are now also mentioned on the wiki as working. On kernel 6.7 and 6.11. I guess the baseline for RDNA3 is also kernel 6.1.