Well i have nvidia gt 440 gddr 5 1gb and i started overclocking it (using vtune) and i could max the memory clock without any problems , but i didnt have so much luck with the gpu/shader clock - stock is 810/1620 and i could rise it to 882/1764 only cause when i rise it more im starting to see some lights with different colors and some strange triangles around the screen when i start a game ; i readed in wikipedia that every color i see means a specific overheating problems ( and i see white, green and i think the last one was red) like gpu overheating , cards ram overheating and more .. when i rise the fan speed to 100% nothing changes (the gpu stays at 45 C ; without overclocking and rising the fan speed it was staying at 72-74 C when playing games) .. so my question is - should i buy a new fan in order to overclock further? http://www.palit.biz/palit/vgapro.php?id=1509 here is a picture of my video card (look at the fan! )