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I just picked up this G4 and was wondering what the fastest processor is that I can replace the 450 with.

Thanks
 

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Well Sonnet sells anything up to a 1.4GHz G4 CPU upgrade for the PowerMac G4 AGP. I imagine PowerLogix would have similar upgrades. The higher the MHz, the costlier the upgrade will be. Giga Designs also makes CPU upgrades and they are supposed to be cheaper http://www.gigadesigns.com/products.html

Personally, I've never upgraded the CPU in a machine. By the time I'm thinking of upgrading, it usually makes more sense to buy a new machine and get the advantages of the new technology and bus speed.
 

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powerlogix released a dual 7457 1.4ghz upgrade recently, along with a dual 1.2
 

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> powerlogix released a dual 7457 1.4ghz upgrade recently, along with a dual 1.2

Yeah! that's AMAZING! PRICEY, but AMAZING
 

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Yeah, but does it make any sense spending that cash on a dual G4 upgrade for a machine with a 100Mhz bus and a 2x AGP (actually it's probably just a 1x AGP). If your considering a dual upgrade, you're probably best to put that cash towards a new G5 or G4 with a faster bus, 4x or 8x AGP and all the other new technologies that come with the new G5 or G4.
 

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Kosh, I agree with you mostly, except I should mention that you do get 2MB L3 cache with those babies, which should count for something
 

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and a 2x AGP (actually it's probably just a 1x AGP)
It's a 2X-AGP slot. A 1X-AGP slot is a PCI-66 MHz slot.
 

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Good questions, Kosh. Ones I'm unable to answer, fully.

There are certainly other issues to consider: Superdrive on G5, but possible incompatibility with PCI cards. Also, I have 1.5GB of ram in my G4/450. How much will that cost to equal that in a new G5?

Also, things got fuzzier and fuzier as to later G4 system's performance. Did the G4 REALLY take advantage of DDR RAM bandwidth?

Here are some reviews of processor upgrades:

http://xlr8yourmac.com/g4reviews.html

Duallies are great, from a single G4/450, if you r software is dual processor savvy:
http://www.barefeats.com/dualies.html
 

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I see the 1 + GHz upgrades useful for machines that have a 133 MHz bus/4X-AGP graphics, but for anything less, I wouldn't recommend getting an upgrade card beyond 800 MHz G4 w/1 MB (or 2 MB) L3 cache - which is still a pretty fast processor.
 
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