Quadra 700 upgrade idea

[Phreakinus]

Okay so I noticed that my Quadra has a 25mhz CPU, and a 50mhz oscillator on the motherboard. So I figure the multiplier must be 0.5x. So what I thought of was taking a 40mhz 68040, and changing out the oscillator to an 80mhz, or maybe 100mhz, thus getting me either 40mhz or 50mhz.

Should work, right? I'm sure someone has tried this before.

 

[coius]

you could possible burn something out. I think something like a 66Mhz oscillator would be more realistic. Even though those CPUs overclock, 40 and 50Mhz will be really pushing it. Especially if it only has a 25Mhz CPU Beginning speed. That's essentiall the same thing as taking a 3.0Ghz XEON and pushing it to 12Ghz. Not going to happen...

 

[Cory5412]

Well, he said he was going to put a 40MHz 040 in there and run the whole thing at 40 or maybe 50MHz. So it's more like taking the 3.0GHz Xeon out and putting a 4.5GHz Xeon in. Not a bad upgrade for such a machine, I know it works out well in the LC475 models, I don't know how well it would work in a Q700, but I'm sure before long, somebody with more knowledge than I on those machines will reply confirming these suspicions.

 

[alk]

Read this page.

http://homepage.mac.com/schrier/faq.html

Peace,

Drew

 

[Phreakinus]

you could possible burn something out. I think something like a 66Mhz oscillator would be more realistic. Even though those CPUs overclock, 40 and 50Mhz will be really pushing it. Especially if it only has a 25Mhz CPU Beginning speed. That's essentiall the same thing as taking a 3.0Ghz XEON and pushing it to 12Ghz. Not going to happen...

I am not talking about overclocking the 25mhz... On old computers like these, to upgrade the CPU you need to change out the oscillator too. I would be running a 40mhz 040 at 40mhz, no overclocking.

I could try to overclock it to 50 though if I wanted to.

 

[coius]

Oh, i didn't see that you would be swapping out the CPU. My apologies. I thought you were going to O'C the 25Mhz to 40MHz or 50Mhz (Thereby doubling the intended frequency) and thereby, you would have killed it. I imagine you can put a 40 in it and OC it to 50Mhz. That would be more realistic. You never know till you try!!!

 

[Phreakinus]

Apparently there is some upgrade card with a 90mhz 68040 on it... Maybe I could find a supplier selling just the 90mhz 040s?

Does anyone know where to find those? I imagine I could overclock one of those very nicely

Edit: This is the upgrade card I'm talking about. http://www.micromac.com/products/90mhz_carrera040.html

 

[Unknown_K]

Apparently there is some upgrade card with a 90mhz 68040 on it... Maybe I could find a supplier selling just the 90mhz 040s?
Does anyone know where to find those? I imagine I could overclock one of those very nicely

Edit: This is the upgrade card I'm talking about. http://www.micromac.com/products/90mhz_carrera040.html

I have one of those but a 66/33Mhz one (IIci PDS version). The chip they are talking about is a 33 or 40 overclocked to 45Mhz.

 

[Phreakinus]

Why do they call it 90mhz?

 

[Unknown_K]

Mostly to make the chip seem faster then it is.

"This model is sometimes designated as having a 66 MHz processor,

since the clock input runs at 66 MHz. However, the processor itself

is not "clock doubled", so technically it is only a 33 MHz processor."

The above refers to the 33/66 designation of the Quadra 950

http://www.everymac.com/systems/apple/mac_quadra/stats/mac_quadra_950.html

 

[Phreakinus]

Hahaha they said it was a 66mhz because of the clock input? well I guess my quadra 700 is a 50mhz then because the clock chip says so.

 

[Quadraman]

You have to remember the other components on the board. They may not take an overclock to 40mhz or beyond.

That Micromac upgrade isn't 90mhz. THe CPU only runs at 45mhz. There is no such thing as a 90mhz 68040. 40mhz is as high as they went. Even 45mhz is overclocked. Also, Micromac has been out of business a long time. You'll never be able to get one of those upgrades unless you find it on ebay.

 

[bigD]

Instead of starting a new thread, I'm going to ask on this one:

Other than a PowerPC upgrade, did anything ever use the PDS slot on the 700?

 

[Unknown_K]

PDS SCSI card and cache card

 

[bigD]

Who made the cache card for the 700? I never knew anyone made such a thing.

 

[bigD]

You know, I just thought of something - the DOS card originally made for the Quadra 610 works in the 700. That's another use for the PDS slot.

 

[Quadraman]

If you are going to go to the trouble to hunt down a cache card then you might as well get a PowerPC upgrade. It will be faster and you can use later OS's and apps. It will also be easier to find and probably cheaper. You'll be bidding against me, though, because I collect them. [}] ]'>

 

[Unknown_K]

Cache cards speed up the 68k quite a bit, I wonder why Apple didn't make use of cache on all their towers.

Why do people push the PPC so much? The only reason I have PPC PDS cards is because I need a weird combination of 5 Nubus slots and a PPC chip for some hardware. Turning a 68K into a PPC is not the best bang for the buck, especially when people just want their 68K to be faster (and cache WILL speed things up quite a bit).

 

[bmacsys]

Putting a ppc card in an 040 Mac is blasphemy. One reason is why is anyone at this point using an 040 Mac as a main machine? Another reason is that a 6100, 7100 or 8100 can easily be had. As can a pci powermac. In fact biege and smurf G3's are about the cheapest Mac's that you can buy on eBay these days. 68k Mac's are just so much cooler than their ppc cousins.