Chris, I can't don't know why your system would slow down with a cache card in your 7500. I haven't been watching this thred closely. but when I put a 1M cache card in with my stock601, its speed increased significantly. Anyway I now have a G4/400 OS9.1 and no problems. just my 2�.
Jim F Christopher D Helmkamp wrote: > >Is there something about the 604 family of processors that slows memory? > >I had a similar experience with my PM 9600/350, 604ev, which performed > >at 27MB/sec. until I interleaved identical 128MB DIMMs which brought it > >up to 37MB/sec. > > My experience has been similar to yours, so I would say that yes, > 604e upgrade cards play games with memory & cache. With a 512k cache > stick installed in my 7500, memory slowed to nearly 18MB/sec and > caused general system instability. I pulled the cache, and memory > performance jumped to around 37MB/sec with two identical 128MB sticks > in A4 & B4 (although it didn't interleave). > > The only solution as I see it is to stick with high-quality EDO DIMMs > of the same or very similar makeup, and if cache is your dig get a G3 > upgrade with on-board cache. The EDO DIMMs operate in Fast Page > Mode, and are engineered better than FPM sticks. The 7500 with stock > 601 doesn't like cache as it is; adding a 604e only complicates > matters. > -- > --Chris -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
