On Fri, 8 Nov 2002 02:42:31 +1100, Rob Weir <[EMAIL PROTECTED]>
wrote:

>On Thu, Nov 07, 2002 at 02:08:47AM +0000, Pigeon wrote:
>> From README.cirrus out of XF86 4.2:
>> >On older chips, the use of a higher dot clock frequencies has a negative
>> >effect on the performance of graphics operations.......
>> I guess the "natural" resolution & speed is that which gives the
>> "best" compromise between refresh rate and drawing performance. It's
>> probably that which Windoze calls the "optimal" rate.
>
>I'd say this is fairly moot once you're getting into AGP 2x video cards
>with hundreds of MIPS of on-board CPU with dozens of megabytes of
>extremely fast RAM :)
>
>-rob

Agree, but the concept is still around, as are slower video cards. On
my SiS6326, the latest X won't use 100Hz for 800x600 unless I tell it
to with a ModeLine; by default it uses 85Hz; if I try telling X that
my monitor won't accept anything lower than 100Hz (as a fudge to avoid
calculating a ModeLine), it won't start. AFAI can see it would use the
same "default rate" even if I had a faster card.

Pigeon


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