basic overclocking Q

[Jcw188]

I have a few 6670's for BTC mining.  I have been using ATI Afterburner to slowly up their clock speeds to increase Mhash.  I don't use the computers for anything else graphics intensive.  Should I just slowly up the clock speeds until the graphics mess up, then lower the speed a little so it's stable?  I have read about raising speed slowly and then running a graphics test after each bump up, but I'm wondering if I can skip that step since I'm not using the comps for anything else really.  I'm also going to try lowering memory speed as I've read that helps.

Thanks

[1714792683]

1714792683

[1714792683]

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[1714792683]

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[hendo420]

Overclock while mining. Up clocks till the hash speed drops or till video card driver crashes. Reboot and set the clock speed 25mhz lower and run the miner and see if it crashes if it does lower it some more till its stable.

If your mining bitcoin only worry about the core clock and drop the mem clock as low as it will go.

If your mining litecoin or some other scrypt coin raise the mem along with the core. Try to keep a ratio of .7 for core/mem, take the mem clock and multiply by .7 and thats what you set your core clock at. It can be a little higher or a little lower but .7 seems to be a good starting spot.

[Jcw188]

thanks hendo!  good plan

[hendo420]

Also i find sapphire trixx works better than afterburner for multiple cards.

[tom_o]

I normally use furmark for stress testing cause that puts a similar if not higher strain on the card than even scrypt mining.