nvidia-gtx comparing gtx vs gt opengltestglx: Processor: Intel Core i7 860 @ 2.79GHz (8 Cores), Motherboard: Dell 0D441T, Chipset: Intel Core DMI, Memory: 12288MB, Disk: 1000GB Seagate ST31000524AS + 1000GB Western Digital WD10EALX-759 + 1000GB FreeAgent + 1000GB Seagate ST31000333AS, Graphics: NVIDIA GeForce GTX 645 1024MB (823/2000MHz), Audio: Realtek ALC269VB, Network: Intel 82578DM Gigabit Connection OS: Ubuntu 13.10, Kernel: 3.11.0-12-generic (x86_64), Desktop: Unity 7.1.2, Display Server: X Server 1.14.3, Display Driver: NVIDIA 331.17, OpenGL: 4.3.0, Compiler: GCC 4.8, File-System: ext4, Screen Resolution: 1680x1050 Unigine Heaven 4.0 1680 x 1050 Frames Per Second > Higher Is Better opengltestglx . 17.54 |======================================================== Unigine Sanctuary 2.3 1680 x 1050 Frames Per Second > Higher Is Better opengltestglx . 78.83 |======================================================== Unigine Tropics 1.3 1680 x 1050 Frames Per Second > Higher Is Better opengltestglx . 63.97 |========================================================