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• #165 gyiku nagyúr

  Új Válasz 2009-10-13 08:23:00 #165

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  gyiku

  nagyúr

  Volt-mod ATI Radeon HD 5770

  
  nagy kép.

  vGPU
  Studying Technical sheet controller L6788A find pin FB (feedback) and look for the meter a few points to make alternative volt-Mod, then measure the resistance between FB pin and the table, multiply the value obtained with the 20x and find out the approximate resistance Map of VR (Variable Resistor) to be mounted. In our case resitenta was measured 2kohm, so VR's must have a value of about 40k, so choose 50k (standardized value).

  vMEM
  The process is exactly as if a vGPU, only here I hit a little problem. Memory controller consists of 1 phase 1 (Vdd and VDDQ) which provides voltage and voltage memories memory buffers. These voltages are independent and are each controlled by one whose face Volterra VT242 datasheet is not made public by the producing company, so we can not know for sure that Pine is FB. Doing some Internet research I managed to somehow find out which PIN FB but PCB is different (vmod site was done on HD 4890) and vmod's operation has not been confirmed. So, I prefer to not make public any plan until you are sure of its correctness.

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