Mailinglist Archive: radeonhd (408 mails)

[Yang Zhao <yang@xxxxxxxxxx>]

2009/6/3 Matthias Hopf <mhopf@xxxxxxx>:
> On Jun 03, 09 09:05:07 -0700, Yang Zhao wrote:
> > 2009/6/3 Matthias Hopf <mhopf@xxxxxxx>:
> > > Ok, in that case your chipset allows for lower clock speeds,
> > > interesting. We'll discuss this with AMD shortly, maybe we get some more
> > > insights. Maybe we even find out what the lowest possible speed is.
> >
> > I've actually been running with memory clock of 250kHz and engine
> > clock of 150kHz on my RV770 for some time. Engine clock at 100kHz
> > seems to be fine as well.
>
> I assume you're talking about MHz ;-)

Um, indeed. ;)


> Memory clock settings might be interesting to set, but we have to
> blank the display when setting them, so this is nothing to set often.
> Unfortunately, because with DDR5 RAM this gives you the biggest savings
> according to my meassurements.

It also affects performance quite a bit, especially for Xv. Probably
only reasonable, by default, to downclock only when in a low DPMS
state.


-- 
Yang Zhao
http://yangman.ca
-- 
To unsubscribe, e-mail: radeonhd+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: radeonhd+help@xxxxxxxxxxxx