Jeff...
Depending on which GF4200 you had (there's a wide range within that GPU),
the upgrade to a 9800 (non pro, non XT) might not been much of a jump in
video card features/speed or resources.
Also, motherboards, drivers, settings, power supplies, AGP port voltage and
CPU capability....all effect video card performance and the mobo/power
supply importance triples with the new video cards. Are you really sure you
are comparing FPS at "apples to apples" with regard to all of this?
My guess is, you have something set different than you had it with the
GF4200....but you are possibly not aware of it and that is accounting for
the performance drop you are experiencing.
You will need to provide all information as to settings and hardware, before
anyone here can be of much help to you. My suggestion is you find one of
the good video card "guru" sites (like Guru3D) and go read up on their
boards for a few hours and get you "basics" up to snuff.
Regarding drivers: The Radeon 9800 shipped with the 3.8's......they were
"rushed" out the door and way under performed. Everyone is using the 3.10's
on their Radeons. My 3dM03 score jumped from low 5,000's to low 9,000's
just with the driver change to the 3.10's (from the CD installed 3.8's on a
9800XT without "turbocharged" turned on).
Regarding power supply: This is an issue that has been taken lightly,
because it was not such a big deal....UP UNTIL NOW! Not all power supplies
are created equal. You need to check the rating on your PW300 and make sure
it is at least 12amps on the (+12) circuit. 15amps would be better....but
12amps is a must. If you must buy a new pw-supply.....get at least a
PW500......power consumption is going up....not down....on our computer
*** hardware!
Regarding Radeon 9800 power supply connection: You are supposed to make
sure your video card and hard drive (primary hard drive, the one that
contains your C drive if you have multiple hard drives in your computer)
share the same power connection! This is critical on a 9800XT, so much so
that they provided a "harness" just to use for making this connection. A
few people, with spare power connections bi-passed using this harness (think
it was more of a convenience item rather than a "requirement").....and end
up not only with a slow video card, but also with having to reinstall their
operating system! Seems the "shutdown" of the video card and HD need to be
coordinated or the ops-sys (WinXP has the biggest problem with this) can't
save the operating system files to the hard drive fast enough. After just a
few shutdowns....your registry is hosed and you have to reinstall because
the back ups are all hosed too!
Just some "food for thought." Hope it's helpful.
Regards,
Tom
PS: Antec makes the best power supplies, IMHO.