Some basic info could help ... such as computer specs, program versions, codecs involved.
Computer ... chip, OS, RAM, graphics card & vRAM, disc array ...
Programs ... which detailed specific versions of which programs (both PrPro & Sg)
Codec ... type of footage from which camera.
Also, any plug-ins or specialty output cards like Matrox, AJA, BMD, that sort of thing.
Neil