MSI GTX 770 2GB (2048 MB) Twin Frozr (B)

Seller Note “Gtx 770 2gb graphics card powers on but faulty.”

Bought as a sister card to MSI GTX 770 2GB (2048 MB) Twin Frozr (A). Nice looking card, also has artefacting issues like the sister card, but not quite as bad.

Pre Checks / Multimeter Only

Test / ChecksResultNotes
1. Visual Inspection Eye / Magnifying Glass
2. Visual Inspection Microscope
3. Check for shorts on 12v PCI, 12v PCI-E, 3.3vOKCouldn’t find any obvious shorts.
4a. Resistance VCore (~0.5)Ω
4b. Resistance VMem (~60Ω) Ω
4c. Resistance 3.3v Rail (~960Ω+) Ω
4d. Resistance 5v Rail (~5KΩ)
4e. Resistance 1v PEX Rail (~123Ω+)
4f. Resistance 12v BUS (14.7kΩ )
4g. Resistance 8.8v Rail (18.7KΩ )

Power On / Test Rig Checks

Tests / ChecksResultNotes
1. Observations (e.g. PCB heat noticed,
blank screen, power light on monitor,
bios screen, o/s loaded, artefacts, )
Loads to Windows.
Moderate artefacting (not green bars, light horizontal lines across whole screen).
Possible to navigate.
Both fans working.
2. Voltage VCore (~0.88v)
3. Voltage VMem (~1.4v)
4. Voltage PEX Rail (~1v)
5. Voltage 3.3 BUS
6. Voltage 12 Ext
6. Voltage 5v Rail
7. Voltage 8.8v Rail

Next Steps

With no obvious power issues / shorts, a Mats memory test could be good to see if the artefacting is memory related, although it may be the GPU.

Mats Test Result:

SUBPART RANK0 RD ERR RANK0 WR ERR UNKNOWN ERR
————- ————- ————- ————
FBIOA[ 31: 0] 0 0 0
FBIOA[ 63: 32] 0 514933 0
FBIOB[ 31: 0] 0 0 0
FBIOB[ 63: 32] 0 0 0
FBIOC[ 31: 0] 0 0 0
FBIOC[ 63: 32] 0 0 0
FBIOD[ 31: 0] 0 0 0
FBIOD[ 63: 32] 0 0 0

Rank 0 Failing bits:
A040 A041 A042 A043 A044 A045 A046 A047
Read Error Count: 0
Write Error Count: 514933
Unknown Error Count: 0

This is very similar to the mats failure on the other GTX770, part of first memory chip.