So, after an absence which life took priority, i be back!
OK, about 3 weeks ago i got a Athlon 64 board and processor, and a week afterwards i got a lucky break on 4chan and got 3GB of DDR 266 for free. Coupled with this is a nifty EVGA 7900GS 256MB PCI-E card, 3x 40GB IDE drives (the sata ports on the motherboard are shot, as well as the onboard video

) and a IDE DVD drive. The OS is windows 7 Ultimate.
The problem that i have in this system is that the core is slow as fuck. Even when i overclock it as much as i can (200mhz faster is about as far as i can push it, craptastic OEM motherboard), my Pentium M annihilates it. It bottlenecks my graphics card so bad it never sees 40% use (and its massively overclocked, stock is 450/625, im at 610/900), and some websites (like 4chan) are slow as hell in scrolling when the core is at full speed, and my laptops core at minimum speed doesnt strain at all (2.2Ghz vs 700mhz).
So what do i do to squeeze every last drop of performance out of this crap computer besides grabbing a dual core (its on my list of shit to buy, as well as a brand new motherboard and some real DDR 333/400) or overclocking it?