The GPU needs a 6-pin PCI-E connector. Also, as long as you have a flash drive, you can install Windows without a DVD/CD/Blu-ray drive. I haven't had an optical drive on my computer for years and haven't missed it.
Will this 1ST PC CORP. CB-6M-68F 8" 6-pin PCI-E to PCI-E 6+2pin cable - 8" - Sleeved from newegg work?