Hi all.
Ive been playing for a few months now, and frankly the performance of my system is not what Id hoped. If ive got a grid of more than 10AI my FPS can drop to like single figures, and if i load an autocross setup with hundreds of objects, again were talking 6FPS which is just useless.
Where is the bottleneck in the following system, and with this system should I be expecting more?

processor: AMD Athlon 64 x2 Dual Core 3800+ (2Ghz)
RAM: 1 GB RAM (DDR2 667MHz)

Graphics: ASUS x1300 Series (256MB Ram)

Screen: 19inch screen running at 1440x900

One thing i have realised is that my system may be underpowered. My power supply has a max output of like 300 watts and I think I need more to run everything. Maybe answering my own question, but could this be the cause of my woes?

Any help much appreciated.
Cheers.

unless you get a warning from your GFX card or your PC restarts then your PSU is up to the job.

I'd blame the terrible GFX card there, but if you upgrade you'll need a new PSU :X

Cheers for that.
Am considering upgrading the whole system frankly. Built it myself and its always been a bit buggy. The system does randomly crash sometimes, which seems to be caused by the DVD drive of all things, and when I start it i get a message before windows load saying 'cant find any disk'...not sure which disk it cant find....but windows loads fine.
anyhoo. cheers for quick reply chap

If you lay down a budget and mention any parts you already have or any other notes i'm sure someone will give you an idea of what you could buy

I think you should be OK with that power supply. I remember I had an Athlon 3200+ and it was pre-tty darn slow with AI.

Cheers for the replies. Really appreciate it.
Was thinking of getting a custom built top spec system from pcspecialist.co.uk, like a quad core intel based system (i know lfs doesnt support multi cores (yet) but i use the system for video editing etc)
i know you pay more because they build it, but im a lazy lazy man, and i think they would build a stable system, and i think they are relatively cheap for what you get

anyway. i must control my envy of those who go on about how they get 15000FPS with 400AI on a screen the size of a small country whilst simaltaneously processing all the data from CERN etc etc...