740s are a pain to find at good prices, or I'd have one in my 6500.I'm not sure if the OP hangs out here, but just spotted this over on one of the FB Apple groups...
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In tthe comments, he also got Tiger running! @max1zzz - this sounds like something up your street?
I was thinking G3-powered Takky CC!I'd have one in my 6500.
So not all 603s are swappable. I think it is just the 603es? Does the Takky have a PGA or a QFP processor?I was thinking G3-powered Takky CC!
Maybe, but those 740's are damn expensive! Cheapest I found in a quick sarch was about £50 before shippingIn the comments, he also got Tiger running! @max1zzz - this sounds like something up your street?
Hmm... still, cheaper than the L2 G3 cards tend to go for -- if you have the tools / skills to do the swap (which I don't!)Cheapest ... was about £50 before shipping
It will be like 30% slower or something than a G3 upgrade without a backside cache. Almost as bad as a pismo with a broken cache. Can you prod the person for a benchmark?Hmm... still, cheaper than the L2 G3 cards tend to go for -- if you have the tools / skills to do the swap (which I don't!)
That's a very interesting idea, though I would worry about the mechanical stability of placing a ZIF module on the BGA footprint. (Though I guess you could use the old heatsink mounting points to anchor the adapter in place)Another idea I had was to make a custom interposer PCB, to adapt the 603ev BGA footprint into one of the ZIF sockets found on G3 PowerMacs, allowing you to simply install one of those G3 ZIF CPU modules
Thank you for the test results. If it is running at 266MHz that gives an idea. Much appreciated. I need to pull out my 300MHz 603ev results to work out what the increase over a 603 is.Yep, it’s of course not going to be as fast as it would if it had backside cache, but is still somewhat of an improvement over the 603ev. Another idea I had was to make a custom interposer PCB, to adapt the 603ev BGA footprint into one of the ZIF sockets found on G3 PowerMacs, allowing you to simply install one of those G3 ZIF CPU modules (which of course have backside cache on them). But that’ll be sometime later. I did run a benchmark using MacBench, here are the results.
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This is running at 300 MHz, as shown. It originally had a 275 MHz 603ev, I set the PLL config to 300 MHz to match the rating of the PPC740 I installed.Thank you for the test results. If it is running at 266MHz that gives an idea. Much appreciated. I need to pull out my 300MHz 603ev results to work out what the increase over a 603 is.
Ah sorry, I was zoomed in on the scores.This is running at 300 MHz, as shown. It originally had a 275 MHz 603ev, I set the PLL config to 300 MHz to match the rating of the PPC740 I installed.
But I think I've heard of a G3 CC with an L2 Sonnet????
Show off!I have a Takky with a L2 sonnet G3.
So 'no cache' = 45% of "with cache" performance? Ouch. Have you tried it with a cache SIMM in the L2 slot?This is running at 300 MHz
Sorry, forgot to reply - it depends on which PM board you choose. The later ones require a mod to supply 3.3V. I'll see if I can find the Takky page and post it.Does the Takky have a PGA or a QFP processor?
This is with 512K of cache installed, but the cache slot is not the same as having backside L2 cache. So I suspect it'd be even worse with the cache module removed.So 'no cache' = 45% of "with cache" performance? Ouch. Have you tried it with a cache SIMM in the L2 slot?