Online BTO options for PowerMacs have both options availble. What's the difference and why are there options here when the price is significantly different.
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ECC - Error Correction ram. - I'd use this if I was doing sensitive work. What it means is if there is a parity in the RAM then it'll fix it. Servers use this kind of RAM same with scientists and a lot of others.Mr. Anderson said:Online BTO options for PowerMacs have both options availble. What's the difference and why are there options here when the price is significantly different.
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ECC RAM (error correcting code) is normally used on a server motherboard for more reliability and costs more, the extra 8 Bits is used to correct the data passing through. Your motherboard probably cannot use ECC RAM and if it able to use ECC RAM it cannot be combined with NON ECC RAM. ECC is parity RAM, Non-ECC RAM is Non-parity RAM. Most types of RAM come in either NON ECC or ECC.
Well you won't really. If you've had a kernel crash or that, there could have been a parity in the RAM. On PC's they won't load up if there is a parity stuck in the RAM. So things just die basically. That's why some vendors RAM works better than others, because they have a fake parity checking mechanism on the RAM.ipacmm said:I ordered my Power Mac with non-ecc 1GB...I might switch to ECC ram later, my windows server takes ECC ram. I can't really tell any difference.
Mr. Anderson said:Hmmm, interesting - so this is basically so things don't crash?
To give a positive example, OSX's server monitor loggs errors that were caught and corrected by EEC RAM. I have an XServe with EEC RAM running at work, and in the past 6 months of 24X7 fileserver use, it has caught and fixed exactly one error.