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.