nachtfalke Posted May 30, 2016 Share Posted May 30, 2016 (edited) hi all , today i made dual output powercard from a dead gtx580 DC2 , but with functional VRM. on GPU VRM we have 8 power phase and 32 mosfet transistors NXP 7030AL ( N-channel TrenchMOS logic level FET) witch can go up to 50A at 80-100 degree , pwm used are ASP0907( remarked) , output filter has 10x 820uF solid cap rated 3V , 4x470uF POS cap and 20x MLLC DDR VRM we have 2 phase and use as pwm uPI6205A and 8x NXP 2530AL up to 25A , output filter 4 x820uF solid cap and on back side the yellow tantalium cap! - cutt the PCB and make sure that are NO short in pcb layer!! - add +5v ( home made DC-DC converter with L7805 - TO220 package) - add +3.3v ( i use a AMS1117 DC-DC converter in SOT package) - add +12V to DDR rail - gpu vid mod to 1.4v by default( fluke DMM) - gpu ocp overall - gpu per phase ocp mod. - ddr ocp mod need only add a trim pot to FB pin on both pwm ( gpu /ddr) and is ready:D Edited June 4, 2016 by nachtfalke Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.