Hi, I Currently have my 465 gtx 1gb from stock gpu 607 mhz and memory 3206mhz to gpu core 850mhz and memory 4000mhz. also using msi afterburner I was able to change my stock voltage from 1.012v to 1.087volts, Im not getting any artifacts using evga oc scanner, my Main Question is seeing at the overclock im at now, If i raise both memory and GPU clocks Ill get Artifacts past 850, but If I raise just my gpu core clock I wont get artifacts, Im asking Whats more important now, GPU clock Or Memory clock to overclock, Thanks