Clock Speeds

Date: Tue, 21 Sep 1993 09:30:29 -0500 From: pepper@rockvax.ROCKEFELLER.EDU (Chris Pepper) Subject: Macintosh Clock Speeds II >Date: Fri, 17 Sep 93 12:52:40 -0400 >From: barnett@amnh.org (Bill Barnett-Interdepartmental Laboratories) >Subject: AV clock speeds > >Hello: > Could someone who can keep megahertzes in their head a little >better than I lay out the clock speeds for the new AVs vis a vis their >middle-aged Quadra counterparts? I realize that clock speeds are not a >measure of the machines performance, but the data would be helpful. >Couldn't find it in MacWorld's report on these machines. Thanks. > >-Bill Barnett barnett@amnh.org American Museum of Natural History ------------------------------ Following are the clock speeds and processors of all the Macs I can remember. This is the second time I'm posting this, and includes the AV machines. Comments, suggestions, & criticisms welcomed. Lisa XL Macintosh (128) 512 (Fat Mac) Plus SE use 8Mhz 68000 Portable PB 100 use 16Mhz 68000 II + MC68881 FPU LC (I) use 16Mhz 68020: no PMMU IIcx + MC68882 FPU IIx + MC68882 FPU SE/30 + MC68882 FPU LC II IIvi (don't believe it includes an FPU) PB 140 use 16Mhz 68030 IIsi use 20Mhz 68030 IIci + MC68882 FPU LC III PB 145 PB 145B PB 170 + MC68882 FPU PB 160 PB Duo 210 uses 25Mhz 68030 IIvx PB 180 + MC68882 FPU PB 165c + MC68882 FPU PB 165 PB Duo 230 use 33Mhz 68030 IIfx + MC68882 FPU uses 40Mhz 68030 Centris 610 uses 20Mhz 68040 Centris 650 (68040 includes FPU functions) Centris 660AV (+ 55MHz AT&T DSP) (68040 includes FPU functions(?)) Quadra 700 (68040 includes FPU functions) Quadra 900 (68040 includes FPU functions) *LC IV *Quadra 605 *Quadra 610 use 25Mhz 68040 Quadra 800 (68040 includes FPU functions) Quadra 950 (68040 includes FPU functions) *Quadra 650 (68040 includes FPU functions) use 33Mhz 68040 Quadra 840AV (+ 66MHz AT&T DSP) uses 40Mhz 68040 All processors, coprocessors, and MMUs are Motorola (e.g. MC68040), but DSPs are AT&T. 668RC040 includes FPU functions on-chip; 68LC040 doesn't. There's a 68LC030, but I don't recall how it differs from the 68RC030 -- possibly FPU or MMU support. All included FPUs are clocked at the same speed as the CPU. All 68030s & 68040s include MC68851 PMMUs (Paged Memory Mangement Units -- necessary for virtual memory); Mac II can accept one in a built-in socket. * means projected for October release; these are speculation and rumor.