is 220 core/ 370 mem a safe overclock setting for geforce2 gts with just the standard fan it came with?

[RayEarth]

I've been play quake3 for awhile & didn't notice any problems, but I don't know really where to look for problems, I have overclocked a lot of computers but this is my 1st time overclocking a videocard. I'm not a mad scientist kinda overclocker when it comes to videocards, so is 220/370 safe setting with just the stock heatsink? I know many of you wiser overclockers say overclock memory as much as possible & leave the core alone, but I don't want to take a big chance killing my card, If you think 370 is too high with just the stock cooling, what's a good spot to stay at?

 

[Majr]

My gts is fine with stock cooling up to 245/410 at 250 or 255 core i get visual anomalies and lockups, if it runs with out locking up then go higher until it dies, then either add cooling of turn it down a little.