Over-clocking an HD3870

I just purchased the Sapphire single slot version and I was wondering if anyone has had any experience with over-clocking this card. If so, what program is best to use.
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In my honest opinion.......
If anyone has just purchased a new Graphics Card and are thinking of over clocking it to increase its performance, to my mind, they have suddenly realised they have just purchased a Graphics Card which does not meet their present requirements!
They are now heading for....
a: Infringing their Warrantee.
b: Destroying the Card.
The reliability is now quickly going down the Toilet!
The same reasoning applies to Central Processors.....!
Paul....Get a faster Graphics Card/Processor to meet your requirements...and leave it Standard!......!
As long as you take your time.. learn what you're doing.. and use a little common sense.. overclocking is fine. If you're that concerened about performance, you'll outgrow the device before you wear it out.. Like if you overclock a $500 CPU and shorten it's life from 4 years down to 2 1/2 years; you'd be replacing it by then anyway. It's no different than puting a slightly larger carb, or better exhaust system on a motorcycle, to squeeze a few more RPM anf HP out of it. ;)