ProRes HQ on a Mac G5 Quad?

I've been trying to work on a project in 10 bit uncompressed 1920 x 1080 HD and the data transfer speed is not allowing me to view my work realtime. I see 2 options - get a big (6 maybe 12 TB) RAID or move to ProRes HQ.
My question - can I work in FCP with ProRes HQ on a Mac G5 Quad (4 x 2.5 GHz with 8.5 GB RAM) or do I need to have a Mac Pro?
I'm still on FCP 5.1.4 and should probably upgrade to 6, and I'm working with a professional post house so I'm getting my files from them on Hard Disk and delivering back to them in FCP and they transfer to HDCam.
Any insights are much appreciated, and if there are any cautionary tales about ProRes HQ I'd sure like to hear them in advance!
Thanks!
Mark

WORK WITH...yes. CAPTURE WITH...no. ProRes requires an INtel Mac to capture...or hardware with onboard encoders like the AJA I/O HD. And note...ProRes HQ is for 2K footage and higher...designed for RED. Regular ProRes is what you want to use. Both are 10-bit, and ProRes looks great, and is 2/3 the size of HQ.
IF you want work with ProRes, you need to upgrade to FCP 6. The codec does not come with, FCP 5. If you upgrade your QT to 7.5.5 or higher it has a built in decoder, but that allows playback only.
If you stick with FCP 5, you need to either infest in a big Raid to handle uncompressed, or capture to DVCPRO HD, which is a fine codec. Especially working with HDCAM...both are 8-bit formats.
Shane

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    Access Time : 11.8 ms
    Burst Rate : 112.9 MB/sec
    the 32MB cache did not make a real or noticeable difference in benchmarks
    http://www.barefeats.com/hard112.html

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