This weekend I was investigating the capabilities of the two NVIDIA graphics cards in my laptop and a password cracking application called oclHashcat. The oclHashcat application uses OpenCL, the Open Computing Language, to utilize the processing power of your graphics cards GPU’s to crack passwords. My laptop is a Dell Studio XPS 1340 which utilizes Hybrid SLI technology to offer a good amount of graphics power while using the least amount of battery life possible. The laptop accomplishes this by mostly using an NVIDIA graphics card, which is a NVIDIA 9400G M, that is installed on the motherboard and only calling the second graphics card, which is a NVIDIA G210M, when it needs to render something in say 3D or higher quality than the 9400G M is equipped to handle. One thing I happened upon during my research was an NVIDIA utility that will easily allow you to overclock your NVIDIA graphics cards which I describe in more detail below.
I have been using Hashcat and oclHashcat a lot in recent weeks but have been limited to primarily using it on Linux servers so I decided to give it a shot on a couple Windows machines. Below I describe how I got oclHashcat operational on Windows 7 Ultimate 32-Bit on a desktop computer with a NVIDIA 9600GT GPU as well as operational on a Windows 7 Ultimate 64-Bit laptop with NVIDIA 9400G M GPU and a NVIDIA G210M GPU. Below is information on what needs to be done to get oclHashcat working on Windows 7.
If you have read any of my other articles recently you know by now that I recently received my new laptop which is a Dell Studio XPS 1340 running Windows 7 Ultimate 64-Bit OS. So far I love it and have been learning a bunch of new features related to Windows 7 as well as the Dell laptop. The Dell XPS 1340 has two video card options which include the default Nvidia GeForce 9600M graphics card or the upgraded Nvidia GeForce G210M graphics card. There are a couple differences between them including Hybrid SLI technology which allows you too easily switch between a performance configuration or a battery saving configuration. Below I describe how to easily switch between the Hybrid SLI modes.