Nvidia Quadro K2000 4Gb

Seller Note “This card just displays a black screen on turning pc on sold for parts only”


  • Appears to be missing the VMem rail.
  • Resistances
    • VCore – 12.4
    • VMem – 104.8
    • PEX – 235
    • 5V –
    • 3.3V – 10.8K
    • 12V – 11K+

Investigation into Key Components

Quadro K2000 – VCore PWM & Drivers

I think this is a Richtek RT8809BZQW https://www.richtek.com/assets/product_file/RT8809A=RT8809B/DS8809AB-02.pdf

It appears to drive a pair of MOSFETS (TBC)

Quadro K2000 – VMem synchronous rectified PWM controller

Its EM5303A https://datasheetspdf.com/pdf-file/807405/CYStechElectronics/EM5303A/1

This also appears to drive a pair of MOSFETs (TBC). I need to check this in more detail since VMem is missing.

PIN 5 – VCC is 12v

PIN 7 – EN is 5v

Need to check further, but it seems the VMem rail may be getting shorted by some switching logic (TODO add pictures)

Quadro K2000 – Power Controller

Its APL3516C https://datasheetspdf.com/pdf-file/761940/ANPEC/APL3516/1