[SOLVED] PC locks up at 4k gaming. Where is my bottleneck?

[oldbutslow]

MY PC is 10 years old, but I have a Nvidia GTX1080ti GPU. Games are good at 1080P but PC crashes at 4k (sometimes requiring an unplug reboot). Where is my bottle neck?
ASUS p9p67 MB (bios; cpu set at performance, RAM set at XML) PCIe 3.0, sata 6
Intel I7 2600k cpu
Zalman 80+ 800 watt psu
Nvidia GTX 1080ti
16 GB RAM (4x4 ddr3)
samsung EVO SSD 1 TB
hard wired cable internet
GPU to pioneer prepro via HDMI
prepro to LG C7 OLED via HDMI

 

[NightHawkRMX]

I would put the blame on your PSU given age.

When you start to stress the GPU more at 4k it draws more power and the PSU cant keep up

 

[faalin]

do you have a link to the pioneer prepro. Is the computer crashing or are you loosing signal passing thru the pioneer

 

[oldbutslow]

do you have a link to the pioneer prepro. Is the computer crashing or are you loosing signal passing thru the pioneer

link is fine. PC crashes to the point where cntrl alt del is needed.

 

[oldbutslow]

I would put the blame on your PSU given age.

When you start to stress the GPU more at 4k it draws more power and the PSU cant keep up

maybe, but can a 850 watt psu lose 200 watts due to age? PC locks up. Is this due to a temperature auto SD switch.