Bad vs Good Nvidia G86 Chip Info Posted

[eecon]

Here is the info off the top of the Nvidia GPU from my July 2007 Built T61 with the infamous defective Nividia GPU issue (MIGR-75087 1-Long and 2-Short Beeps). Also included for your viewing enjoyment is the info off the top of the Nvidia GPU from my Warranty replacement Nvidia GPU that came mounted on the replacement main board:

Old board FRU 42W7652 H5-5W with old Nvidia Chip marked on top with:

NVIDIA
23N3GH 0723A2 (23rd week of 2007)
A TAIWAN
NB9055.00W
G86-740-A2

New board FRU 43Y9047 H5-6W with new Nvidia Chip marked on top with:

NVIDIA
30N383 1030A2 (30th week of 2010)
A TAIWAN
N2R857.01R
G86-741-A2

Note the date codes and part number differences.

[DeDragonSlayer]

A 15.4 inch T61p with motherboard replaced in Austria in November 2010 has:

New board FRU 43Y9048

NVIDIA
U911B114 0945A2 (45th week of 2009)
S TAIWAN
PC 6081.M1W
G84-950-A2


Based on these data, could it be safe to assume that all board FRUs starting with "43" mean a fixed NVIDIA chip? These FRUs are not found on the lenovo site, it might be an internal designation for services only, to easily differentiate between "good" and "bad" boards.

[eecon]

Welcome to the Forum and thanks very much for sharing your T61p info ...... Please note however that my July and August 2008 built T61p units system mainboards both begin with 44C (from the factory) ..... they skipped the 43 series altoghther so you may be correct. I believe Lenovo began using the 44C board from the factory on the 15.4" T61p in early 2008.

However, it is the date code on the Nivida chip that is the most certain way to tell the status of the Nvidia GPU.