Try 2
Try 4


Try 3: 

	Processor: Intel Xeon E5-1650 0 @ 3.80GHz (12 Cores), Motherboard: HP 1589, Chipset: Intel Xeon E5/Core, Memory: 16384MB, Disk: 500GB Seagate ST3500630SV, Graphics: NVIDIA Quadro 4000 2048MB (405/1404MHz), Audio: Realtek ALC262, Network: Intel 82579LM Gigabit Connection

	OS: Ubuntu 16.04, Kernel: 4.10.0-28-generic (x86_64), Desktop: KDE Frameworks 5, Display Driver: NVIDIA 387.26, Compiler: GCC 5.4.0 20160609 + CUDA 9.1, File-System: ext4, Screen Resolution: 2944x1080


Smallpt 1.0
Global Illumination Renderer; 100 Samples
Seconds < Lower Is Better
Try 3 . 73 |===================================================================