[mythtv-users] Video Memory -- How Much?
pat at flying-gecko.net
Thu Oct 19 15:35:54 UTC 2006
On Wed, Oct 18, 2006 at 02:12:34PM -0700, Jon Boehm wrote:
> Yes, one of the key differences between the 5200 and the 6200 is that the
> 6200 can do dual link DVI. But which mem size?
You can do the math yourself:
1920 x 1080 = 2073600 pixels
24 bits per pixel = 3 bytes per pixel
so 2073600 x 3 = 6220800 bytes per screen
You want to double buffer so you have 2 screens
6220800 x 2 = 12441600 bytes
12441600 / 1024 = 12150 kbytes
12150 / 1024 = 11.87 Mbytes
So pretty much any card with more than 12MB of memory could
theoretically support a double buffered 1080p display. What else the
driver uses memory for (scratch areas, other surface rendering,
viewports, whatever) isn't accounted for, but most any new card on
the market today should work since they pretty much all have more
than 12MB of memory.
Patrick Ouellette pat at flying-gecko.net
kb8pym at arrl.net Amateur Radio: KB8PYM
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