Upgrading processor to pentium D from pentium 4

gamer2321

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Aug 26, 2013
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I have an old HP Pavilion Media Center TV m7550kr Desktop PC.
My Specs are as Follows:
Pentium 4 524 3.06ghz
2gb system memory
8600gt ddr2 512mb
Asterope 2 motherboard
Windows 7(32- bit)
300w PSU
I want to upgrade the cpu to a pentium d 945 as it is the best my motherboard will support however i have the feeling that i will need a new psu (I AM NOT EXPECTING TO FURTHER UPGRADE THIS MACHINE AS I HAVE A CORE2 QUAD computer which i use for gaming) Will i be able to upgrade without a new PSU?
EXPERTS HELP WOULD BE REALLY APPRECIATED