>At 23:36 -0700 05/26/2002, Howie S wrote: > > >>Heh, exactly... Dual G4 upgrade cards start at over $600.00 and go up from >>there. Whoa. > >Anyone else looked at the specs on the new PPC750FX from IBM? It's a >1 GHz G3 with up to 20X multiplier. Which means that on a 50 MHz bus >you could still get 1 GHz on the CPU. I'm not sure how much >performance you'd lose with such a high multiplier. Because our >S900s tend to go up to about 60 MHz bus speed most of the time, you >could probably do a 17X bus multiplier and something like a 59 MHz >bus speed and still get 1 GHz. > >Further, IBM has put the 512KB L2 cache on the chip, so there's no >need for separate cache chips (saves a little money in assembly) and >the L2 cache runs full speed at the same speed as the CPU. The >disadvantage is that it's only 512KB and not 1 MB as most mid to high >end upgrades are these days. > >I'm really drooling for an upgrade maker to stick this thing on a >ZIF. If I can figure out how to get my hands on a sample, I may >buy a used 233 or 266 Apple ZIF and see if I can rip off the old chip >and solder down one of these new ones. > >Mad Dog, you ever have any luck soldering on BGAs? Actually, I'm not >yet sure the thing is pin compatible with older CPUs. IBM doesn't >appear to have a data sheet on their site, only marketing type stuff >so far. Odd, since they claim it's sampling in early 2002.
SOrry, I never got past the theoretical stage. While I think I can get a BGA off, I dont know how I would put a BGA on....... Plus, I thought these new chips had enough electrical differences to prevent thier easy use on the upgrade market. >Jeff Walther Mad Dog -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
