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Thread: 680i (eVGA, XFX, BFG...) A1 / D00 Rev. VCORE AND VDROP DONE!

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  1. #11
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    What I've said applies to high loads and hardcore benching, in 24/7 setups you might not notice any issues.

    The most simple mod is upgrading filtering capacity for the circuit's output with capacitors that have very low ESR and can work at very high frequencies; capacity is not very important. Since yesterday i've changed the extra caps with 5x 3300uF Rubycon MBZ, wich are very good electrolytic caps; there are of course Alu ones that have even better performance, but i didn't have enough of them at hand.

    But, the most important mod is the base frequency clock for the PWM, wich varies with the value of Rt accordingly to the attached table. Rt is the resistor from pin12 of the PWM controller (ADP3189) and the standard measured value is 118Kohm. I was using about 80Kohm when i finished tests today, and at 1.810V idle i got ~1.790V loaded (full, on all 4 cores) with pretty clean output. The mosfets are getting very hot in these conditions, so you will definetely need a strong fan over them to run a 3DM06 for example. This eliminated the shutdowns in high loads tho', so i'm happy .
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    Last edited by Micutzu; 08-30-2007 at 08:55 PM.

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