Exporting video in PP and ME hard locks PC

[#1]

I just built a new PC and whenever I try to export any video it hard locks. Doesn't matter if it's in Media Encoder or Premiere Pro but non Adobe software like HandBrake works fine. I am not even doing heavy rendering, this is outputting some low end SD footage. 

Specs are:

i9 10900k

32 GB RAM

GTX 1070

Thanks!

[#2]

I just built a new PC and whenever I try to export any video it hard locks. Doesn't matter if it's in Media Encoder or Premiere Pro but non Adobe software like HandBrake works fine. I am not even doing heavy rendering, this is outputting some low end SD footage. 

Specs are:

i9 10900k

32 GB RAM

GTX 1070

Thanks!

[#3]

Just and update, after fiddling around some more I realize that it is specifically H264 causing the crashing. I output an AVI no problem.

[#4]

Hey Chris,

Are you using a preset, or is this H.264 export customized at all? Let us know if it is and what your settings are. Hopefully we can find out what's going on there.

Thanks,
Kevin

[#5]

The only thing I am changing is doing a constant bitrate of 1 MB/s. I thought I fixed it by turning off the hardware accelerated encoding and decoding and chaning the project file to Mercury Playback Engine Software Only and this worked for a few test exports and one 3.5 long 1080p video but now it is back to crashing on this 480p video I am exporting.