Thanking everyone for their help thus far, would love your settings tomorrow!
I just don't know what to do; I have the option to return this set but will give it another few days!
GOT IT! working. So don't give up hope. It was a few oversights on my part.
1. I had SwitchResX installed on my rmbp which was passed its trial period. Even though it explicitly stated that i could continue to use it but could only save 2 custom settings. This turned out to be false or my misunderstanding. Any how, purchased license ($17) and Bam.
2. I continued to have some misfires with saving setting with SwitchResX. The settings would save and would become active after reboot but would not show up on the selection screen. At one point I unplugged the Accell adapter and switched to my older Moshi adapter, the older 3840x2160 14Hz showed up, When I switched back to the Accell adapter the newer custom 3840x2160 30Hz was available to select and worked fine.
So while the Accell adapter did not work for me out of the box, it did work fine after properly registering SwitchResX. Curious if I would have had all these issues if I would have never installed it. I had also installed "Display Menu" app yesterday, which confused everything more. It shows me a completely different list of screen resolutions.
Here is my setup:
rmbp late 2011.
osx 10.8.2
SEIKI 50" 4k tv "SE50UY04"
SwitchResX 4.3.5
29.895Hz Settings:
---------------------------
Mode = 3840 x 2160 @ 29.895Hz
Pixel Clock............. 262.00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 5 lines
Back Porch.............. 80 pixels 23 lines
Blanking................ 160 pixels 31 lines
Total................... 4000 pixels 2191 lines
Scan Rate............... 65.500 kHz 29.895 Hz
(unchecked) Positive horizontal sync.
(checked) Positive Vertical sync
13.80Hz Settings:
---------------------------
Mode = 3840 x 2160 @ 13.799Hz
Pixel Clock............. 120.00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch............. 48 pixels 3 lines
Sync Width.............. 32 pixels 5 lines
Back Porch.............. 80 pixels 6 lines
Blanking................ 160 pixels 14 lines
Total................... 4000 pixels 2174 lines
Scan Rate............... 65.500 kHz 13.799 Hz
(unchecked) Positive horizontal sync.
(checked) Positive Vertical sync
And thanks to (omvs)
30.00Hz Settings:
---------------------------
Mode = 3840 x 2160 @ 30.00Hz
Pixel Clock............. 279.00 MHz Non-Interlaced
Horizontal Vertical
Active.................. 3840 pixels 2160 lines
Front Porch............. 176 pixels 8 lines
Sync Width.............. 88 pixels 10 lines
Back Porch.............. 296 pixels 72 lines
Blanking................ 560 pixels 90 lines
Total................... 4400 pixels 2250 lines
Scan Rate............... 67.500 kHz 30.000 Hz
(unchecked) Positive horizontal sync.
(checked) Positive Vertical sync
SIDE NOTE: A few week ago, I also started experimenting with command line tools to add new screen resolutions. Check out
http://mac.linux.be/content/setting-xorgconf-manually-xrandr. I know this is a linux how-to but osx has the same tools. Anyhow I was never able to successfully save new Modeline. Everything worked except I could never figure out the name of the external device to save to.