I’m in the process of building a machine to do some parallel computing using the cuda toolkit. The specification of the machine is:
Motherboard: MSI-X79G45(8D) | Processor: Intel i7 3820 | 16Gb DDR3 Kingston Genesis 2400 | GPU1: Geforce GTX 660 (For compute only - not connected to a monitor) | GPU0: Geforce 210 (For Monitor) | OS: Scientific Linux 6.3 (64bit) - 2.6.32-279.22.1.el6.x86_64
The GTX 660 is installed in the second PCIe 3.0 slot on the motherboard which runs at x16 and the MSI BIOS has PCIe 3.0 enabled.
I have succesfully installed the latest GPU drivers: 313.18 (64bit) and have attempted to set the paramater [NVreg_EnablePCIeGen3=1] to enable PCIe 3.0 through the following process:
Set /etc/inittab to [id:3:initdefault] to disable X and restart the machine at the command prompt
Log in as [SU]
Unload the Kernel Module with [modprobe -r -v nvidia] (Linux confirms module)
Set the Kernel Parameter with [modprobe nvidia NVreg_EnablePCIeGen3=1] (No confirmation or error)
Load the Kernel Modlue with [modprobe -v nvidia] (No confirmation or error)
Reset /etc/inittab to [id:5:initdefault] and retsart the machine into X
When I open NVIDIA X Server Settings and examine the settings for GPU1 (GTX 660) I get the following:
Bus Type: PCI Express x16 Gen2
Bus ID: PCI:3:0:0
PCI Device ID: 0x11c0
PCI Vendor ID: 0x10de
PCIe Generation: Gen2
Maximum PCIe Link Width: x16
Maximum PCIe Link Speed: 5GT/s
I was expecting to see Maximum PCIe Link Speed as 8GT/s not 5GT/s?
Does anyone know where I am going wrong? I’m new to Linux so any advice would be a real help.
Thanks in advance.