In a message dated 10/30/01 9:50:27 PM, [EMAIL PROTECTED] writes:
>I suggested the FPU because the floating point performance of the 040 is not >as impressive as it's integer performance. It behaves more as if it were >running at 33MHz, not 66MHz. For example, a PowerMac 6100/60 can run MacAMP >and play MP3s in real time, but a Q840AV can't (80MHz effective 040). Real world apps see much greater difference in coding as opposed to processor differences. The PPC chip (RISC-reduced instruction set chip) and the CISC (complex instruction set chip) '040 are different animals. I had a Q840AV which ran circles around my 7100, with certain software. Also, most Duos are LC040, sans FPU. Getting back on topic, Jessica hit the nail on the head. The "output" of the chip runs at the slower speed, the internal processes run clock doubled. This allows faster CPU clocking without forcing expensive upgrades for the rest of the hardware. We used some Intel chips as internal controllers and swapped them for the clock doubled/tripled/quadrupled variants as we picked up 10 to 20% higher processing capability with the internal clock doubling. It is NOT 2X/3X/4X the thru-put by any means (even by Intel's fake numbers!) but every bit helps! One note....the Intel chips got QUITE toasty, the Motorola chips have a lesser problem (never looked at the chip level design, but M has designed low power chips for years, while Intel goes for the "V8" mentality, this may be one reason why M chips tend to run cooler). My little 280 (hey, MD, actually had it running at 46 mhz for a while!!) has been quite abused, but still ticks along as if it was new. Don't try the 46 mhz mod unless you have a Peltier cooler for it....I could have fried eggs on the CPU....current useage doubled, I shut it down before permanent damage occurred. Talk about one HOT machine! <<grin>> Andrew (back on the road again in the home of Tequila!) ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> NineWire | If they are cool enough to host this list... Digital Solutions | ...you should check them out! http://www.NineWire.com/ Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
