MSI afterburner GPU overclocking help & CPU as well

Hardware Hub GPU
1

need help as to how to overclock my GPU which is this http://www.newegg.com/Product/Product.aspx?Item=N82E16814161404

& i used this MOBO http://www.newegg.com/Product/Product.aspx?Item=N82E16813131873

CPU is http://www.newegg.com/Product/Product.aspx?Item=N82E16819103727 i use the turbo option & clocked it to 3.9Ghz im not sure if that was the issue with my Pc crashing while in game i think it was my GPU 

2

i have a feeling i may of overclocked my GPU wrong 

3

GPU clock speeds please?
 

4

You cant trust the built in "Auto tune/level up" features from motherboards to effectively OC your gear. If you used those mobo features in the BIOS then thats where I'd put my money on your crashes being caused from. Either way your GPU shouldnt be causing system crashes like that - just artifacting if you overclocked it too much. You can also set your CPU/system speeds back to stock then test your GPU's overclock to rule out the system or the GPU.

SCIENCE!

5

Ive gotten Driver crashes from bad overclocks on my card but never have a ran into artifacting, then again i dont over clock to high (Rarely do i do more the 125Mhz)