Pc G5 2GHz with 1.5Gb DDR SDRAM running OSx 10.4.11. Can I upgrade to OS 10.5

I have an imac G5 2Ghz power pc running tiger 10.4.11. My  i tunes 9  will not support the newer ipods and I can't download i tunes 10 due to my OS. Can I upgrade OS 10.5 on to my computer. I have checked the requirements on the apple software site, but not sure if my processor is compatible?
Any help would be appreciated.

2GHz should be fine. RAM is more important - specs say min. 512MB but 1GB or more is really needed for good performance.
Can be difficult to find the DVD though.
This info courtesy of TexasMacMan;
Mac OS X 10.5 Leopard installation system requirements
http://support.apple.com/kb/TA24950
Leopard is no longer available at the Apple Store but may be available by calling Apple Phone Sales @ 1-800-MY-APPLE (1-800-692-7753).
If you can't obtain a retail install DVD from Apple, look on eBay or Google the installer part numbers to possibly find at an on-line store. Here's what to look for:
MB427Z/A  Leopard 10.5.1 install DVD
MB576Z/A  Leopard 10.5.4 install DVD
MB021Z/A  Leopard 10.5.6 install DVD (single user)
MB022Z/A  Leopard 10.5.6 install DVD (5-user family pack)
Installing Mac OS X 10.5 Leopard
http://support.apple.com/kb/HT1544
Mac OS X 10.5 Leopard Installation and Setup Guide
http://manuals.info.apple.com/en/leopard_install-setup.pdf
After you install the base 10.5, download & install the 10.5.8 combo update at http://support.apple.com/downloads/Mac_OS_X_10_5_8_Combo_Update
P.S. You've posted in the Intel iMac forum; there's a separate forum for PPC iMacs

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