Hi,
Hope someone has a clue as to what's happening with my upgraded rig - hopefully something simple!
My 10 year-old base rig needed a new GPU, so I slapped in a w/c OC'd GTX 1080 Ti in there (see details below).
Ever since I've had the new gfx card in there, when playing graphics-hungry games on high or max settings, often the system will suddenly just completely shut down and power cycle... I don't think it's a thermal issue, as the temps on the GPU seem fairly solid at around 45 deg C (as is watercooled with a 120mm quad rad...). Although under-clocking the GPU seems to reduce the frequency/incidence of shutdowns (so could be a power issue).
The only things I can think of are:
- Perhaps the GTX 1080 Ti is pulling too much current from the mobo (over the PCI Express bus), and the mobo is shutting down as a safety measure? I couldn't find any settings in the BIOS that controls this - is it a default function?
- Surely the 1500W PSU isn't shutting down, with the gfx card pulling too much current from the two 6+2 pin PCI Express power cables??
- Having the 4 120mm fans being powered via the gfx card - is this increasing the demand of the gfx card from the mobo and/or PSU even further - causing the cut-outs?
- Is the Northbridge on the mobo struggling? I know the gfx card is quite limited with the older PCI-e bus being slow, but that has only seemed to increase the game loading times (as it slowly loads textures over the slow bus into gfx memory, etc.).
If it isn't one of the above, then I'm not sure what it could be... Any suggestions gratefully received...
Rig
-----
SilverStone ST1500 (1.5kW) Modular Silent PSU
ASUS Rampage III Extreme mobo
Intel Core i7-980X Extreme 3.33Ghz
Corsair 3GB 1600MHz DDR3 CL8 x 4 (12GB)
UPGRADED -> NVIDIA GTX 1080 Ti (ASUS ROG Strix OC, water cooled, with EK water blocks)
ASUS Soundcard
3 x SATA SSDs
2 x SATA HDDs
Other notes
----------------
- 2 separate water cooling loops (3x120 rad for CPU, 4x120 rad for GPU, split XSPC reservoir).
- In-line fluid temperature sensors on water cooling loops connected to temp sensors on mobo (but thermal cut-outs disabled in BIOS)
- I had to connect my 4 daisy-chained 4-pin 120mm fans on GPU loop quad rad to the fan port on the GTX 1080 Ti, as the Rampage III Extreme only has 3-pin fan connectors
Thanks in advance,
- bn


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