clutchc :
If the above link I posted was your machine, both the card and the PSU will fit fine.
Sorry to keep bothering you, but I am concerned about ordering this: EVGA 120-G1-0750-XR 80 PLUS GOLD 750 W 10 yr Warranty Fully Modular NVIDIA SLI Ready and Crossfire Support Continuous Power Supply.
and this: EVGA GeForce GTX 960 04G-P4-3967-KR 4GB SSC GAMING w/ACX 2.0+, Whisper Silent Cooling w/ Free Installed Backplate Graphics Card
and putting them into the Gateway FX6850-51. Will they fit into it? Will I need any adapters or extra pieces?, I am doing this myself and just don't want to order and find they don't fit or comply. I don't care about any warranties of course. I know how to replace things, I just am hoping someone knows for sure what my FX can hold. Thank you for your time.