Nvidia GTX Titan reference PCB

 

 

Pics of the card:

 

 

Mods:

Also, please be aware that the reference VRM design by Nvidia is really weak once you start overclocking. As Rbuass mentioned earlier, his card died at a mere 1.46V Vgpu! If you want to go extreme, you should look into your own zombie vrm.

 

These are the modifications that are on the pictures:

• GPU (NVVDD) Voltage Measurement
  
• GPU (NVVDD) OverCurrent Override
  
• GPU (NVVDD) OverVoltage
  
• GPU (NVVDD) Coldslow / shutdown
  
• GPU Core Clock Range Shift Up
  
• Memory (FBVDD/Q) Voltage Measurement
  
• Memory (FBVDD/Q) OverVoltage
  
• PLL Voltage Measurement
  

 

Front and back pics (click for high-res version):

 

 

Okay, here is the BIOS. It's the same like every other extreme overclocker is using but can't share. Basically:

 

- version 80.10.2C.00.00 = engineering bios

- version 80.10.2C.00.02 = retail bios

 

With this bios you will have power limit raised to +300%, also for air cooling. Beware ... this is an engineering BIOS for a reason!

 

Link: http://downloads.hwbot.org/downloads/VGABIOS/GK110XOC.rom

Tip: use LN2 cooling for PWM. This is how Vivi did it.