On 2021-06-27 04:26, Greg V wrote: > On June 26, 2021 10:11:42 PM UTC, Robert Huff <roberthuff_at_rcn.com> wrote: >> >> Greg V <greg_at_unrelenting.technology>: >> >>> Robert Huff <roberthuff_at_rcn.com>: >>> >>> > (For anyone in my position: I _think_ the RX 460 and above >>> >support GCN 2.1, which is what I _think_ is the bottom-end >>> >specification. Cards matching this number seem to start at about >>> >US $50.) >>> >>> GCN is the name of the GPU architecture, not something a GPU >>> "supports".. >> >> Got that; the "support" is from the software. >> I have two conflicting desires: >> a) I want to run modern applications ... >> on the latest stable version of X ... >> using an actively maintained and >> improved version of amdgpu/drm ... >> working with reasonably high-performance hardware. > > Yes, all you need is a GCN GPU. Avoid the really old pre-GCN (TeraScale and > older) > architectures and you'll be fine. > >> b) I have a very limited budget, and would ideally like to be >> able to use this on older systems - say ones with a PCIe 2.0 >> expansion slot. > > No conflict here: PCI Express generations are all backward and forward > compatible. > You can run the newest gen4 cards in gen2 slots just fine (obviously at gen2 > bandwidth). > > Similarly it's all compatible between different lane counts, e.g. you can > shove an > x16 card into an x4 slot (if it's not an open ended slot.. it can be made > open-ended with a rotary tool :D) You can also paint contacts on the card to enable/disable "features" as required for a given scenario. :D. Had to do that to get a newer Nvidia card to work in an old Mac.
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