Seller Note “Powers on and displays but there are artifacts on the screen so being sold as spares or repair. missing some screws as seen in the photos.”
Summary
- Visual inspection seems like this board, although a nice sturdy unit, has a few scratches, the backplate is indeed loose and it’s a bit dirty.
- Resistances seem OK: Vcore 1.7, Vmem 71.7
- HDMI port quite loose, signs of corrosion around back plate.
- On test, both fans spin, but blank screen – not artefacts as described.
- Luckily card was cheap, it is in quite rough condition.
- Next steps would be to take apart and check voltages.
- Crashes windows if used as a secondary card.
- Had broken thermal pads on memory and VRM (!Remember to replace if fixed!)
- There is a fuse F1800 3.3v and 5v
- Can only find 3.3v, 5v and 12v – no minor rails.
Pre Checks / Multimeter Only
| Test / Checks | Result | Notes |
|---|---|---|
| 1. Visual Inspection Eye / Magnifying Glass | ||
| 2. Visual Inspection Microscope | ||
| 3. Check for shorts on 12v PCI, 12v PCI-E, 3.3v | ||
| 4a. Resistance VCore (~0.5) | Ω | |
| 4b. Resistance VMem (~60Ω) | Ω | |
| 4c. Resistance 3.3v Rail (~960Ω+) | ||
| 4d. Resistance 5v Rail (~5KΩ) | ||
| 4e. Resistance 1v PEX Rail (~123Ω+) | ||
| 4f. Resistance 12v BUS (14.7kΩ ) | ||
| 4g. Resistance 1.8v Rail | Ω |
Power On / Test Rig Checks
| Tests / Checks | Result | Notes |
|---|---|---|
| 1. Observations (e.g. PCB heat noticed, blank screen, power light on monitor, bios screen, o/s loaded, artefacts, ) | GPU cold, no minor rails. | |
| 2. Voltage VCore (~0.88v) | 0v | |
| 3. Voltage VMem (~1.4v) | 0v | |
| 4. Voltage PEX Rail (~1v) | – | |
| 5. Voltage 3.3 BUS | 3.3v | |
| 6. Voltage 12 Ext | 12v | |
| 6. Voltage 5v Rail | 5v | Back of card, |
| 7. Voltage 1.8v Rail | – | – |
Component Walkthrough
Fuses
- F400 (back, near PCI EXPRESS) –
- F1800 (back, near crossfire connecers) –
APW7165C Buck Controller:
- U701 (back) – Pin 1 BOOT, 5 VCC, 7 COMP
- U702 (front left, middle) – Pin 1 BOOT, 5 VCC, 7 COMP
- U901 (front left, top) – Pin 1 BOOT, 5 VCC, 7 COMP
U4059 (front, left middle) APL5930 LDR http://images.100y.com.tw/pdf_file/38-ANPEC-APL5930.pdf – Pins:
- 3,4 VOUT
- 5 VIN
- 6 VCTRL
- 7 POK
- 8 EN
U16 uP1608PK Multi-Phase Synchronous-Rectified Buck Controller (right, drives Vcore VRM)
Q801 PD1503YVS Dual N-Channel Enhancement MOSFET (back, near R47 inductor)