I got help from the facebook Octane group.
Apparently there are issue with third party plugin compatibility when you use Octane max - 2.23.2-2.0 or higher.
I was suggested to downgrade to 2.23.2-1.9 and everything is good now.
So, Max 2016 + Octane max plugin - 2.23.2-1.9 + HDRI Light studio 5.2 ...

Hi,
Just trying out the new HDRI Light studio 5.2 with latest Octane plugin 2.23.2-28 for Max 2016.
Everything is working fine apart from the real time renderer. Is there something I am not doing ?

I remember in HDRI Light studio version 4 there was a temp HDRI file that you use sit on the slot ...

hahaha Smicha. dont jinx my new computer
I reinstalled the cards and tightened the screws a little bit more. They definitely seem more straight now.

But Ill stop worrying about it now....... Back to Octane

Looks like HDRI to me. There seems to be no parallax happening between objects like the pillars and the glass wall etc.
For merging the floor you can try assigning a diffuse material to the ground plane and checking the 'matte' option in the material.

In some of the tutorial I have seen, people ...

yes its sagging down towards the front of the case.
The case is standing vertical still. its not being transported or anything.

ill see if I can tie up the suspended sagging part with the top of the case, or something.

I was just worried that it might slowly damage the internal parts.

Ive just installed 2 ASUS GTX 970s and they clearly seem to be leaning downwards towards the front of case.
Is this normal ?

The more I look at it the more they seem to be bending downwards.

Simple setup. I am on max plugin. Haven't tried motion blur yet.
Did you model the car aswell? Thanks for the HDR link. They have a great collection.

Thank you so much for helping out guys.
I have finally built my rig. Just wanted to thank you all for your help.

Time to make those GPUs work

Thats a fantastic render.
The very sharp body side shoulder character line is a give away but thats the issue with the model quality.
Great render nonetheless.

Can you share some info on the HDRI and BG image ?
How'd you get the motion blur happening on the BG image ?

Just discovered this thread. Beautiful rig smicha. I am speechless