EVGA GTX 780 3Gb (Card B)

Summary

  • Resistances
    • VCore – 4.1Ω
    • VMem – 88.7Ω (Hynix H5GQ2H24AFR-R0C)
    • PEX – 316.5Ω
    • 5V – 3.3KΩ
    • 3.3V – 841Ω
    • 12V – 13.4KΩ
  • Has a failing VRAM chip F0, bad artefacts
  • Missing some PCI capacitors and some from the memory area.

Looking into failing MODS & MATS

MODS assertions failing, corrupted screen, MATs indicates F0 is completely failing (all bits):

mats version 367.38.  Testing GK110B with 10 MB of memory starting with 0 MB.
Errors found. Use -matsinfo for details.
This message will only appear once.
  SUBPART     RANK0 RD ERR  RANK0 WR ERR   UNKNOWN ERR
------------- ------------- -------------  ------------
FBIOA[ 31:  0]            0             0             0
FBIOA[ 63: 32]            0             0             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
FBIOE[ 31:  0]            0             0             0
FBIOE[ 63: 32]            0             0             0
FBIOF[ 31:  0]            0        442080             0
FBIOF[ 63: 32]            0             0             0

Rank 0 Failing bits:
   F000 F001 F002 F003 F004 F005 F006 F007 F008 F009 F010 F011 F012 F013 F014 F015 
   F016 F017 F018 F019 F020 F021 F022 F023 F024 F025 F026 F027 F028 F029 F030 F031 
   
Read    Error Count: 0
Write   Error Count: 442080
Unknown Error Count: 0

BIT  RANK0 WRITE  RANK0 READ     UNKNOWN
---  -----------  ----------     -------
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F000       27964           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F001       54592           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F002       27964           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F003       54592           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F004       27964           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F005       54592           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F006       27964           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F007       54592           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F008       27964           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F009       54592           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F010       27964           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F011       54592           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F012       27964           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F013       54592           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F014       27964           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F015       54592           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F016       27964           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F017       54592           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F018       27964           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F019       54592           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F020       27964           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F021       54592           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F022       27964           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F023       54592           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F024       27964           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F025       54592           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F026       27964           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F027       54592           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F028       27964           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F029       54592           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F030       27964           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0
F031       54592           0           0

ADDRESS    EXPECTED ACTUAL   REREAD1  REREAD2  FAILBITS TPSEIB ROW  COL
---------- -------- -------- -------- -------- -------- ------ ---- ---
00009a7e7c 00000000 ffffffff ffffffff ffffffff ffffffff WF0057 0019 1df
00009a7e78 00000000 ffffffff ffffffff ffffffff ffffffff WF0056 0019 1de
00009a7e74 00000000 ffffffff ffffffff ffffffff ffffffff WF0055 0019 1dd
00009a7e70 00000000 ffffffff ffffffff ffffffff ffffffff WF0054 0019 1dc
00009a7e6c 00000000 ffffffff ffffffff ffffffff ffffffff WF0053 0019 1db
00009a7e68 00000000 ffffffff ffffffff ffffffff ffffffff WF0052 0019 1da
00009a7e64 00000000 ffffffff ffffffff ffffffff ffffffff WF0051 0019 1d9
00009a7e60 00000000 ffffffff ffffffff ffffffff ffffffff WF0050 0019 1d8
00009a7e5c 00000000 ffffffff ffffffff ffffffff ffffffff WF0057 0019 1d7
00009a7e58 00000000 ffffffff ffffffff ffffffff ffffffff WF0056 0019 1d6
00009a7e54 00000000 ffffffff ffffffff ffffffff ffffffff WF0055 0019 1d5
00009a7e50 00000000 ffffffff ffffffff ffffffff ffffffff WF0054 0019 1d4
00009a7e4c 00000000 ffffffff ffffffff ffffffff ffffffff WF0053 0019 1d3
00009a7e48 00000000 ffffffff ffffffff ffffffff ffffffff WF0052 0019 1d2
00009a7e44 00000000 ffffffff ffffffff ffffffff ffffffff WF0051 0019 1d1
00009a7e40 00000000 ffffffff ffffffff ffffffff ffffffff WF0050 0019 1d0
00000a4b3c 00000000 ffffffff ffffffff ffffffff ffffffff WF0047 0001 1ef
00000a4b38 00000000 ffffffff ffffffff ffffffff ffffffff WF0046 0001 1ee
00000a4b34 00000000 ffffffff ffffffff ffffffff ffffffff WF0045 0001 1ed
00000a4b30 00000000 ffffffff ffffffff ffffffff ffffffff WF0044 0001 1ec
00000a4b2c 00000000 ffffffff ffffffff ffffffff ffffffff WF0043 0001 1eb
00000a4b28 00000000 ffffffff ffffffff ffffffff ffffffff WF0042 0001 1ea
00000a4b24 00000000 ffffffff ffffffff ffffffff ffffffff WF0041 0001 1e9
00000a4b20 00000000 ffffffff ffffffff ffffffff ffffffff WF0040 0001 1e8
00000a4b1c 00000000 ffffffff ffffffff ffffffff ffffffff WF0047 0001 1e7
00000a4b18 00000000 ffffffff ffffffff ffffffff ffffffff WF0046 0001 1e6
00000a4b14 00000000 ffffffff ffffffff ffffffff ffffffff WF0045 0001 1e5
00000a4b10 00000000 ffffffff ffffffff ffffffff ffffffff WF0044 0001 1e4
00000a4b0c 00000000 ffffffff ffffffff ffffffff ffffffff WF0043 0001 1e3
00000a4b08 00000000 ffffffff ffffffff ffffffff ffffffff WF0042 0001 1e2
00000a4b04 00000000 ffffffff ffffffff ffffffff ffffffff WF0041 0001 1e1
00000a4b00 00000000 ffffffff ffffffff ffffffff ffffffff WF0040 0001 1e0
.................
00004b1924 00000000 ffffffff ffffffff ffffffff ffffffff WF0021 000c 189
00004b1920 00000000 ffffffff ffffffff ffffffff ffffffff WF0020 000c 188
00004b191c 00000000 ffffffff ffffffff ffffffff ffffffff WF0027 000c 187
00004b1918 00000000 ffffffff ffffffff ffffffff ffffffff WF0026 000c 186
00004b1914 00000000 ffffffff ffffffff ffffffff ffffffff WF0025 000c 185
00004b1910 00000000 ffffffff ffffffff ffffffff ffffffff WF0024 000c 184
00004b190c 00000000 ffffffff ffffffff ffffffff ffffffff WF0023 000c 183
00004b1908 00000000 ffffffff ffffffff ffffffff ffffffff WF0022 000c 182
00004b1904 00000000 ffffffff ffffffff ffffffff ffffffff WF0021 000c 181
00004b1900 00000000 ffffffff ffffffff ffffffff ffffffff WF0020 000c 180
000030e37c 00000000 ffffffff ffffffff ffffffff ffffffff WF0057 0008 03f
000030e378 00000000 ffffffff ffffffff ffffffff ffffffff WF0056 0008 03e
000030e374 00000000 ffffffff ffffffff ffffffff ffffffff WF0055 0008 03d
000030e370 00000000 ffffffff ffffffff ffffffff ffffffff WF0054 0008 03c
if you are getting failure for first MBof FB then try option -no_scan_out
Error Code = 00000001 

                                        
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Next Steps

  • I have that VRAM chip in stock, will try replacing it as per this procedure Graphics Card VRAM Chip Replacement Procedure.
  • If testing is successful i.e. clear screen and MATS pass, then I will look to repair those missing capacitors.

Here we can see the pads thoroughly cleaned, the new chip ‘deliberately misaligned’ before heating and the perfectly in-place after re-flow (see the procedure linked above for more detail if needed)

Testing, thankfully leads to a clear picture and passing MATS tests! More stress testing is required, but replacement of those capacitors…