My Mac Pro Shuts down during sleep

Well I have a variation on what others are experiencing with their machine.
1- I put the mac to sleep. Or it goes to sleep when i's supposed to.
2- I let it sleep at least a few minutes…
3- when I press the space bar, the following happens:
- the mac responds immediately (see below)
- the fans kick in just as when you start it from shut down with power button
- the startup screen appears and everything after this point is the same as a cold boot.
I'm puzzled, but this is more an info message than a call for help.
My setup:
2.8 GHz 8 core Jan 2008 mac pro.
4x2 GB RAM from OWC (667 Mhz)
2x1 GB RAM (factory) reseated to follow the RAM arrangements guideline.
8800 GT video Card.
4x 750 GB Seagate drives. formatted as two RAID 0 pairs. One of the two holds the OS and apps.
The only other thing present is the OWC/Newertech S-ATA adapter that essentially brings the 2 unused SATA ports to the back of the compouter. Nothing is plugged to this for now.
Software:
OS 10.5.2 ans all updates applied.
for the moment the only non-apple app installed is the temperature monitor suite.
Hope this tells something to others. Will send this info as "feedback" to apple.
maxpol

Ok so my g5 died...still complaining. Should have had apple replace it while still under apple care.
Had to buy an intel mac which has limited compatibility but is fast, durable.... i doubt it. I was sold on the g4s before i switched to apple. Never owned one bought a g5 to switch from pc for audio recording. Durability was my goal, didn't think i would ever need mac pro.
Mac pro reboots after it has been asleep. This is not a ram error. It is a design flaw. Their are many things that cause sleep issues which seem to be very complicated. This problem is sold with your mac.
The first thing i did before i even opened the box was read apple discussions on this issue and other bug reports. There are lots of reports on this particular issue as i was familiar with it the first time it happened to me which was maybe the second time i put the computer to sleep. To be honest why there hasn't been an immediate bug fix is disheartening. All i got to say is typical. I think i will be having some very stern words with apple tomorrow. Over all dissappointment in all departments regarding apple- durability, compatibility, backwards compatibility, customer support, and their inability to stand behind their flagship machines. I guess they're just a second rate circuit city brand. This is not only a rant.

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