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will 4 sticks of this ram work??

If I'm reading this correct this will not work. The speed is not the same and also it is non-ECC and it should be for your computer. Of course I could be wrong.
 
It should work, but it is not the correct type. It'll run slower. Probably better off selling it and buying another 2GB stick to match what you have.
 
it might work but do not have the heat sink's so I would personally not do it. Put it on eBay and buy the proper RAM because a Mac Pro is quite an investment so I would not risk it
 
Umbongo said:
It should work, but it is not the correct type. It'll run slower. Probably better off selling it and buying another 2GB stick to match what you have.
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It should, but Apple may have disabled the use of non ECC RAM, and it would default to 1066MHz. Also, it would likely have to be installed on it's own, not mixed with the stock memory, provided Apple didn't disallow its use in the firmware.
 
nanofrog said:
It should, but Apple may have disabled the use of non ECC RAM, and it would default to 1066MHz. Also, it would likely have to be installed on it's own, not mixed with the stock memory, provided Apple didn't disallow its use in the firmware.
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It's already been shown that non-ECC memory will work and down clock to 1066MHz if it is rated than that.
 
Umbongo said:
It's already been shown that non-ECC memory will work and down clock to 1066MHz if it is rated than that.
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I thought that was only with a system that had the stock W3520 swapped out for an i7-975. So I didn't mention it, as I'm not sure if it matters or not (though it shouldn't).

It's still technically possible to disable the non ECC functions if the CPU is ECC capable, though it would be so specialized, I'd think any such "memory tampering by Apple" would have been much simpler. 😉 On or Off. 😛
 
MythicFrost said:
I would buy some good RAM from otherworldcomputing.com

Kind Regards
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I second this. Sell the RAM on eBay and buy the real deal from OWC. OWC RAM is ECC, has nice sized heat spreaders, and also contains a thermal sensor specified by Apple. Although i don't believe the thermal sensor is absolutely required. Why not just put the RAM in your machine and see if it works? If it works without issues, then keep it! 🙂
 
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