Overclocking a Graphic card

I have an HIS 4650 512MB Graphic card. I overclocked it from the Catalyst Control Center.

GPU Clock - Default=600 OCed @ = 700
Memory Clock - Default=500 Not Oced

When i play Battlefield 2 on default settings it runs fine. But when i overclock it even a little bit, it lags.

And i run 3DMark Vantage. Upto 700 on the GPU clock it runs fine. But when i increase more everything gets stuck. Why?

And this card doesnt have a fan. Instead it has a Zalman isilence4 heatsink. In Catalyst Control Center it shows that a fan is working. And it even shows the fan speed %. Why?
1 answer Last reply
More about overclocking graphic card
  1. Sorry ppl. Opened a new thread in the wrong section. Dont post replies here.
Ask a new question

Read More

CPUs Default Overclocking Graphics Cards