Install Nvidia drivers and use coolbits to adjust the frequecy of the
Ram and the
GPU. Having said that I have
oc'd my 5200 and not really achived very mch (I can't remember the specific right now as performance didn't improve very much. Its a budget DirectX9 card so don't expect a huge amount from it.. I think most people here will agree its not the best .
Do a Google search on Coolbits and if I find it I put a link in this post to direct you to the instructions.
(PS you can use Rivatuner as well if you want)
EDIT: Sorry to answer your question you don't need to open your case to
OC it. If you intend on giving it a real run for its money then cut up an old P1 heat sink and get some thermal pad, then attach to the
Ram chiops on the card (either that or buy them), this will require opening the case.
Look through the Pimprig forum I'm sure there is a guide to using Coolbits here somewhere. or
http://oc3dmark.octeams.com/tip02.html
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2.4Ghz Mobile Celeron (Northwood 256) @ 3.4Ghz - $30 How can you argue at that?