@gilban,
post #19
http://www.overclock.net/t/1445164/ultimate-mac-overclocking# radzę podrążyć temat. Procki były tylko chęci brak :)
I call the High-Res / Late-2005 PowerBooks G5s because they use the Freescale 7448 / 7458. A single Freescale 7458 has the performance of a single IBM 970, which is what Apple named the G5. Apple crippled the Late-2005 PowerBooks. They lowered the 200MHz FSB to 167MHz, shut down the GPU x16 PCIe bus, lowered CPU speed to 1.67GHz even though it was built for 2.0GHz and up, shut down the 2nd core on the die (I'm not sure about the second core, the CPU does have two PLLs, leading me to suspect that it is two CPUs in one package, but I cant prove it), disabled 85% of the cache, and closed half of the 64-Bit FSB.
Why would they do that?
I don't know. I speculate that when Freescale began shipping the 7458s, Apple had already finalized the deal with intell. Apple used the 7458 in the Late-2005 PowerBooks because: A. they wanted DDR2 RAM and/or B. Freescale had stopped fabricating 7447As. Off the top of my head, Dual unlocked 7458s should have GeekBenched somewhere between 3500 and 6500, that would have have destroyed all the intell MacBooks, all MacBook Pros until the 2010 models came out, and still be able to compete with today's MacBook Airs. Apple was not going to let its brand-new MacBook Pros be half the speed of an old PowerBook, so they cut the PowerBook's speed to 1/4 to 1/8 of what it could really do. They also covered up the fact that the High-Res PowerBook had a 7458, opting to call it a "7447B", a magical CPU that never existed in Freescale documentation.
Ostatnia aktualizacja: 16.09.2017 19:41:49 przez PrzemasIII