Overclocked GeForce 2 MX, is it safe?

I overclocked my GeForce 2 MX, after modifying it a little bit, I popped off the heatsink from the GPU, and placed a fan, and some silicon goo stuff, that absorbs heat... arctic silver or something like that.

I tried putting some heatsinks on the ram, but the ram chips are awkwardly placed, so I didn't put a heatsink on the ram.

Anyway, I set it to:

Core Clock Frequency: 200mhz
Memory Clock Frequency: 185mhz

I noticed a significant performance increase in Morrowind, in some places where the game was really slow before, such as in Balmora (for anyone who plays the game) I got a significant increase in performance there. Anyway, my question is are these settings good, two high, or two low? Can I afford to go higher, or should I tone it down a bit? Anyway, I am tired, it is late... (Like 3 am) so I am going to go to bed...

 

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