VRay for Rhino not using 100% CPU

[brandonstone]

I'm not sure if this is the proper place to ask this but here goes nothing. I have just built a new PC and when rendering using V-Ray in Rhino it is significantly slower than my old PC... Which doesn't make sense since the new PC spec wise is better in every way.

 

Specs:

AMD (Old PC)

Processor: AMD FX-8150 Zambezi 8-Core 3.6GHz Socket AM3+

Memory: G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600

Video Card: EVGA GeForce GTX 560 Ti (Fermi) 2GB 256-Bit GDDR5

OS: Windows 7

 

Intel (New PC)

Processor: Intel Core i7-4790K Devil’s Canyon Quad-Core 4.0GHz LGA 1150 (Hyperthreaded)

Memory: G.SKILL TridentX Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400

Video Card: MSI GAMING GeForce GTX 750 Ti 2GB 128-Bit GDDR5

OS: Windows 8.1

 

The AMD processor will render using 100% of the cpu. My test rendering finished ~8 min. The Intel processor only uses ~20% of the CPU and finished in ~30 min. I've posted a link to an album with all of my V-Ray settings shown. Both PC's are running V-Ray Version 2.00.02. I have a feeling that my V-Ray settings are optimized for my AMD processor and not my new Intel. Could anyone help me tweak the settings in order to see a boost in performance from the Intel processor? Thanks!

 

Album: http://imgur.com/a/hmHO5#9

 

CPU Comparison: http://cpuboss.com/cpus/Intel-Core-i7-4790K-vs-AMD-FX-8150