Seller Note “Card does not post and displays no output”
Summary
- Resistances:
- vcore – 2.6Ω
- vmem – 102Ω
- pex – 395Ω?
- Resistances seem ok, voltages too. Card loads to windows, but Error 43.
- Tested in mats, there is a failing memory chip (see below)
mats version 400.184. Testing GP107 with 20 MB of memory starting with 0 MB.
Read Error Count: 0
Write Error Count: 1310720
Unknown Error Count: 0
=== MEMORY ERRORS BY SUBPARTITION ===
SUBPART READ ERRORS WRITE ERRORS UNKNOWN ERRS
------- ----------- ------------ ------------
FBIOA0 0 0 0
FBIOA1 0 0 0
FBIOB0 0 1310720 0
FBIOB1 0 0 0
Failing Bits:
B001
=== MEMORY ERRORS BY BIT ===
P : Partition (FBIO)
READ 0 READ 1 READ ?
P BIT READ ERRORS WRITE ERRORS UNKNOWN ERRS EXP. 1 EXP. 0 EXP. ?
- --- ----------- ------------ ------------ ------ ------ ------
B 001 0 1310720 0 0 1310720 0
=== MEMORY ERRORS BY ADDRESS ===
ADDRESS : Failing memory address, or buffer offset if starting with 'X+'
T : Type of memory error: W = write, R = read
P : Partition (FBIO)
S : Subpartition
B : Bank
E : Beat
ADDRESS EXPECTED ACTUAL REREAD1 REREAD2 FAILBITS TPSBE ROW COL BIT(s)
------- -------- ------ ------- ------- -------- ----- --- --- ------
000135fcbc 55555555 55555557 55555557 55555557 00000002 WB017 009a 035 B001
000135fcb8 55555555 55555557 55555557 55555557 00000002 WB016 009a 035 B001
...
0000060db8 55555555 55555557 55555557 55555557 00000002 WB006 0003 005 B001
0000060db4 55555555 55555557 55555557 55555557 00000002 WB005 0003 005 B001
0000060db0 55555555 55555557 55555557 55555557 00000002 WB004 0003 005 B001
If you are getting failure for first MB of FB then try option -no_scan_out
Error Code = 00000001
####### #### ######## ###
####### ###### ######## ###
## ## ## ## ###
## ## ## ## ###
####### ######## ## ###
####### ######## ## ###
## ## ## ## ###
## ## ## ######## ########
## ## ## ######## ########
Steps
- Attempt initial reflow of chip B0 – Failed, in fact made the card inoperable, the chip is clearly too badly broken.
- Replace chip B0 with new Samsung K4G41325FE-HC28 using process Graphics Card Vram Chip Replacement Procedure
- Memory resistance now seems lower, but still good at 70 Ohms
- On the first attempt, I didn’t use enough heat and the chip appeared a bit higher in one corner (sure sign). So repeated to reflow (pass ‘nudge test’, hadn’t done this before) and success!
- MATs passes, Windows loads and drivers load! 🙂
mats version 400.184. Testing GP107 with 20 MB of memory starting with 0 MB.
Read Error Count: 0
Write Error Count: 0
Unknown Error Count: 0
=== MEMORY ERRORS BY SUBPARTITION ===
SUBPART READ ERRORS WRITE ERRORS UNKNOWN ERRS
------- ----------- ------------ ------------
FBIOA0 0 0 0
FBIOA1 0 0 0
FBIOB0 0 0 0
FBIOB1 0 0 0
Failing Bits:
None
Error Code = 00000000 (OK)
####### #### ###### ######
######## ###### ######## ########
## ## ## ## ## # ## #
## ## ## ## ### ###
######## ######## #### ####
####### ######## ### ###
## ## ## # ## # ##
## ## ## ######## ########
## ## ## ###### ###### Stress testing
- Kombuster HD – Pass
- Furmark HD – Pass
- Subnautica running well.