My computer cant even handle games on the lowest graphic settings, ive updated all of my drivers. My specs are
CPU - Intel Core i7 processor 4790, RAM - 12GB DDR3 Memory, HDD - 2TB Hard Drive,VIDEO - NVIDIA GeForce GTX745 4GB
Yeah, I'm pretty sure your thermal throttling. Go into your NVIDIA settings and change the fan speed to manual and crank it up until your temps stay around 75 - 80. Your really close to your GPU getting damaged with those temps. The max temperature for that card is 95C
Most Dell computers - I'm guessing it's a Dell - Do not have much for video cards - fine for MS office, web, etc. Is it a full size case? You may want to consider a psu/gpu upgrade.
-Bruce