did u update directx?
update windows
update your video card drivers
go to motherboard's support page and wodnload ann latest drivers and bios updates
basically just download and install all the updates u can find for every piece of hardware and dont forget firmware
check all the logs on ur pc and check event viewer
even if ur room temp is freezing cold at high load the cpu can heat up pretty quickly and cool down as quickly so log your cpu temp while playin
maybe your video card is overheating did u check the fan on it?