On Fri, Dec 13, 2002 at 12:17:10PM -0500, Murray J. Root wrote: > On Fri, Dec 13, 2002 at 05:56:23PM +0100, Bruno Thomsen wrote: > > > Somehow, I cannot use 1600x1200 with a color depth of 24 as before. It > > > says that the 32 megs of memory aren't enough. I had to lower the depth > > > to 16 to be able to use that resolution. > > > > > > It was working fine with the previous version. > > > > > > GeForce2 Integrated GPU > > > > Hey > > > > If you only have 32 megs of memory, you cant run in 1600x1200 24bit > > color, here is why: > > memreq = (1600 bit x 1200 bit x 24 bit) / (1024 x 1024) = 44 Megabyte. > > If you use 16 bit color: > > memreq = (1600 bit x 1200 bit x 16 bit) / (1024 x 1024) = 30 Megabyte. > > > > You have confused bytes and bits. Divide by 8. >
To followup myself - according to NVidia docs, 24bpp uses 32bpp, just the high order 8 bits are not used. So the correct calculation is 1600*1200 pixels * 32bpp/8bits_per_byte / (1024*1024 bytes_per_Meg) = 7.3M -- Murray J. Root ------------------------------------------------ DISCLAIMER: http://www.goldmark.org/jeff/stupid-disclaimers/ ------------------------------------------------ Mandrake on irc.freenode.net: #mandrake & #mandrake-linux = help for newbies #mdk-cooker = Mandrake Cooker
