XPS 8700 No Video & other surprises

Hi all.  I set out to replace the cpu to 4790K, and a new fan and video card, also two new fans.

Ok go to start no video. Fans,CD, power all work.

Prior to the disassembly I forgot to set the boot to CD.  I was told to run the sata from the cd to #0 sata port and the SSD  to #1. All other satas to be disconnected and wala your in.  Not today so I reversed the sequence. And I'll be darned, right where I started. I had 32MB ram reduced that to 16. This whole tim I was disconnecting the monitor only when I connect, disconnect do I get the message no signal. Bought a EVGA GT 630 same problem.  Outside of throwing it away what do I do now.