Celemine...I have the same card in my AMD Box right now. I usually run the card at 190GPU and 205 Memory. Your real goal is to up the Memory as far as it will go without causing artifacts or freezups.
As a rule of thumb...you should try to keep the GPU clock at least 8-10MHz below the memory. The GPU's on most GeForce 2 Cards are awesome...but the 32meg SDR (single data rate) memory on most cards creates a performance bottleneck. The max I've seen for memory on these cards (which have better 5.5ns memory) is 210-220MHz stable. I can get up to 209 on the memory without problems but I keep it lower to try to conserve the chips.
I run a small fan attached to the GPU for extra cooling and I suggest you add one if you want to OC the GPU. I experimented with cooling the memory but I currently just have a "greenie" from a mobo chipset covering a portion of all 4 chips. Good luck...and take your time. Keep us posted on your results
On a few games I can run as high as 205 core and 203 memory, but for 3Dmark and most other 3D games, 200/200 is about my max. I am very picky about quality though and won't tolerate any artifacts or stay pixels popping up. You have to put a fan on that core to help cool that puppy down. Removing the sink, lapping and using thermal paste really helps. I got even better results with a Blue Orb. I also installed RAM sinks, but they really didn't help much, but it does sure looks cool.
I'll attach active cooling to GPU and RAM! One big thin fin 50x50x20mm cooler + 52x52x20mm fan for the GPU and the stock heatsink and a 50mm fan for the RAM. Both with the use of Arctic Silver Adesive. I hope this will work.