Vchipset/DDR + AGP VOLTAGE MOD
Updated 05/11/02 by Tim B @ OCWorkbench.com
All images courtesy of
Miikka Kolo here.
Gymyforte's AGP Mod+pic
Note: Increasing the chipset voltage increases the AGP and DDR voltages also.
Location for Resistors to
increase voltage to the Chipset(+vcore).
When chipsetvoltage is @default (1.78V), DDR and AGP voltages are @default also (2.5V and 1.5V).
When chipset gets 1.89V (1 kOhm), DDR voltage is 2.68V and AGP 1.57.
When chipset gets 2.19V (260 ohms), DDR voltage is 3.12V and AGP is 1.82V.
So be carefull when playing with chipsetvoltage when you have DDR and AGP mods installed.
See HERE for resistor values
Status of Mod.
!Caution!: haven't tested myself, so can't confirm.
-also noticed that chipsetvoltage is connected to LM358 noninverted inputs (A and B) through 3.3kOhm resistor. That is propably the reason why DDR and AGP-voltages rise among chipsetvoltage. Solution: disconnect chipsetvoltage and feed 3.3V through resistor with higher resistance. Will it work? Don't know, propably won't test too soon.
The VCore mod uses a 10k 18-turn pre-set plus a 10K safety resistor and adjusts up to 2V core.
The VAGP uses a 680 ohm safety resistor and a 5k preset, giving around 1.8V maximum.
The VDDR uses a 220 Ohm resistor and a 5k preset, giving around 2.75V maximum.
The VChipset uses a 220Ohm resister and a 5k preset, which should give a maximum of around 2.25V.
Of course, combinations of chipset and AGP and DDR will give higher voltages.
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