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Sonnet pci cards for mac pro 2013 increase speed

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I have a 300GB Velociraptor in my tests, which is newer and bigger (-> dense platters).

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Oh, and since he uses a WD Raptor, which was built until 2006 or 2007 (most often sold as 74GB and 80GB version, some rare 150GB models), it must be slower anyway. So how come that two persons with the same Mac and same PCI-Cards and comparable SATA-Drives get a difference of 60MB/s? So in his example the Mac is the same and he uses even older/slower drives like the WD6400AAKS.

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JapaMac for example has a PowerMac G4 AGP or GigabitEthernet and he tested all ports once with AJA-Test and other benchmark tests, he got 100MB/s (even 114MB/s once) for SATA.

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4) under variety of drives transfer speeds do not much differ' And my first post: '1) it's about internal SATA-PCI, which should be a 'bit' faster than firewire, 2) different PCI-Cards tested 3) PowerMac is the same with every drive and Card, so no change there.