I am having trouble diagnosing a 1070Ti that will get to the windows desktop, then reboot and not make it back to the desktop.
When checking power rails I have:
12V
5
3.3
1.80
occasionally 1.0V but this is intermittent and since this is the PEX rail I assume that dropout of this rail takes the GPU down and crashes the card.
No shorts on any of the other rails.
Resistance is 60 ohms on the 1.0 rail.
I am investigating the uP1728Q.
I have confirmed that it is getting 3.3V at Vin on Pin3, 5V from 5V Rail at VDD on Pin2.
I am seeing 0V on EN intermittently and concurrent with loss of the 1V output obviously from the UP1728Q .
In diode MODE:
PIN 9: 0.60V to ground
PIN 10 (EN): SHORT
In Resistance mode:
PIN 9: 2.6 kOhms
PIN 10 (EN): SHORT
Advice needed here:
Change the UP1728Q?
Trace the ENable signal: PS NVVDD PGOOD
PS NVVDD PGOOD seems to come from a buck converter: UP9511
I am puzzled as to whether to investigate the UP9511 or change out the UP1728Q.
Any help or advice would be appreciated.
When checking power rails I have:
12V
5
3.3
1.80
occasionally 1.0V but this is intermittent and since this is the PEX rail I assume that dropout of this rail takes the GPU down and crashes the card.
No shorts on any of the other rails.
Resistance is 60 ohms on the 1.0 rail.
I am investigating the uP1728Q.
I have confirmed that it is getting 3.3V at Vin on Pin3, 5V from 5V Rail at VDD on Pin2.
I am seeing 0V on EN intermittently and concurrent with loss of the 1V output obviously from the UP1728Q .
In diode MODE:
PIN 9: 0.60V to ground
PIN 10 (EN): SHORT
In Resistance mode:
PIN 9: 2.6 kOhms
PIN 10 (EN): SHORT
Advice needed here:
Change the UP1728Q?
Trace the ENable signal: PS NVVDD PGOOD
PS NVVDD PGOOD seems to come from a buck converter: UP9511
I am puzzled as to whether to investigate the UP9511 or change out the UP1728Q.
Any help or advice would be appreciated.
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