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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!malgudi.oar.net!ucbeh.san.uc.edu!temple
- From: temple@ucbeh.san.uc.edu
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: LC video RAM upgrade
- Message-ID: <1992Sep6.151253.1718@ucbeh.san.uc.edu>
- Date: 6 Sep 92 15:12:53 EST
- References: <61.2aaa7d3d@ivgate>
- Followup-To: comp.sys.mac.hardware
- Distribution: world
- Organization: Univ. of Cincinnati
- Lines: 43
-
- In article <61.2aaa7d3d@ivgate>, Leonard.Short@macrocosm.omahug.org (Leonard Short) writes:
- >
- > MJ> (From: Mark.J..Sisson@p842.f70.n109.z1.fidonet.org (Mark J. Sisson))
- > MJ>
- > MJ>
- > SH> I have an LC with "256k video RAM, upgradable to 512k" as quoted by
- > SH> the "Features" pamphlet that came with my LC. Do I needa special board
- > SH> or anything additional, or can I go out an buy the 512k RAM and plug
- > SH> it right in? Thanks. hue@pro-freedom.cts.com (scott hudziak)
- > SH>
- > LS>
- > LS> It is just a special SIMM. You just buy the 512k SIMM. Remove the 256k
- > LS> SIMM and snap in the 512k. The SIMMs cost about $50 from the Chip
- > LS> Merchant. It has been my experiance that the new video ram will slow
- > LS> down the computer somewhat. Also quite a few programs will display 256
- > LS> colors at most so unless you are doing something that needs 16 bit
- > LS> color, you will be giving up some speed and getting questionable
- > LS> benifits.
- > MJ> I do not think that the 512K VRAM SLOWS the computer down at ALL! The
- > MJ> whole idea behind a separate VRAM is that it does NOT intrude on the
- > MJ> RAM that you have installed to deal with applications! Unless you
- > MJ> haave some knowledge that no one else in the Mac world has....I think
- > MJ> you're coming up Short on the facts.
- >
- > I do not know why the extra Vram slows down my computer. I do know that before
- > I installed the Vram my LCII tested about 4.25 times as fast as a Classic using
- > Speedometer. I installed the Vram and since then the best test I've gotten
- > using the same program is about 3.35 times as fast as a Classic. It could be
- > something wrong with my using of the progarm or somthing wrong with the testing
- > program. I do know that I've run the test repetedly and gotten the same
- > results. It doesn't seem to matter weather I have the color set for 8 bit or 16
- > bit.
-
-
- Has anybody suggested the obvious yet? Namely, that the greater the
- number of colors you display (at a constant monitor resolution), the
- slower things get because there is more info. It has NOTHING to do
- with VRAM, but with the pixel depth.
- If you set the monitor at a lower pixel depth, this almost
- invariably explains the difference. (lower = faster; smaller screen =
- faster, too).
-
- Jon
-