Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!valentin From: valentin@cbmvax.commodore.com (Valentin Pepelea) Newsgroups: comp.sys.amiga.hardware Subject: Re: Memory speed on the A3000 Message-ID: <11427@cbmvax.commodore.com> Date: 8 May 90 08:31:50 GMT References: <68@burken.bula.se> Reply-To: valentin@cbmvax (Valentin Pepelea) Distribution: comp Organization: Commodore, West Chester, PA Lines: 24 In article <68@burken.bula.se> Pekka Hedqvist writes: > > I've read in a Swedish BBS that the FastMem memory in the A3000 is > clocked at 16Mhz in the 25MHz A3000 too. If that's right the speed > increase between the 16Mhz & 25Mhz should be quite modest. > > Is this correct? Currently both the 16 and 25 MHz A3000 are filled with the same ram chips, 100ns I believe. This allows both of them to perform memory accesses within the same amount of cycles. In the future though, the 16 MHz model might have slower ram chips than the 25 MHz, since they don't need to be that fast. There's no such thing as ram chips 'clocked at 16MHz' or 'clocked at 25 MHz'. The useage of appropriately fast ram chips allows the CPU to fetch data without undue "wait states". A wait state is a wasted cycle during which the CPU must wait until the ram chips are ready to return the data needed. Valentin -- The Goddess of democracy? "The tyrants Name: Valentin Pepelea may distroy a statue, but they cannot Phone: (215) 431-9327 kill a god." UseNet: cbmvax!valentin@uunet.uu.net - Ancient Chinese Proverb Claimer: I not Commodore spokesman be