I'm fine with tying the 8400 and 8500 together if you assign it 128MB of memory for now. I think the desktop cards typically have 256MB or more but some boards (and I think mostly laptops) might have only 128MB.
Though the same issue would remain for the 8100/8200/m8300 regarding cuda, but those cards aren't used that much (well some cheap laptops/desktops might use them) but using them for CUDA might really not make sense just of performance reasons. Roderick > Separating the 85/8400 into it's own id is valid and easy enough to do. I > had tied them to the 8600GT because I thought it was simpler and created > less overhead for just two GPU's that probably don't represent a large > population. I think the 8400 should be tied to the 8500 or on it's own. If > you put the 8400 back with the 8300 then someone might run into the same > issue we are having now. > > > Thanks, > > Seth Shelnutt > > On Mon, Jul 12, 2010 at 2:51 PM, Roderick Colenbrander > <[email protected]> wrote: >> >> Hi Seth, >> >> It is not a good idea to advertise a 8400 and a 8500 as a 8600GT. All >> Geforce8 GPUs have the same features (except, some have different >> purevideo capabilities). As mentioned before even CUDA is allowed on >> all GPUs but only if they have 256MB or more. >> >> Likely the app you are using either disallows this GPU based on the >> wrong number of video memory Wine reports or it just disallows poor >> GPUs because it is not worth the effort to use them for CUDA >> computations because they don't have enough computation power. >> >> The Geforce 8600GT is (depending on the configuration) upto 4x faster >> (if you just look at shaders + clock speeds), so it is really not a >> good idea to mark the 8400/8500 as a 8600GT. This could really cause >> issues for games which use the PCI id to select a performance profile >> at startup. >> >> It would be better to add a separate 8500GT entry with 256MB. I'm not >> sure if we want to merge it with the 8400 though since the 8500 has >> 256-1024 (depending on the model) and the 8400 has 128-512MB. A lot of >> modern games like to have around 256MB. I guess it is best to keep the >> 8400 tied to the 8300. >> >> Roderick >> >> On Sun, Jul 11, 2010 at 7:04 PM, Seth Shelnutt <[email protected]> >> wrote: >> > Moves the Nvidia Geforce 8400 and 8500 to be reported as 8600GT as >> > they have >> > feature parity. This is needed for CUDA applications to support these >> > two >> > cards. They are currently reported as an 8300 which is not CUDA capable. >> > >> > Thanks, >> > >> > Seth Shelnutt >> > >> > >> > >> > > >
