HardOCP does another test to see how big the performance difference between Windows XP and Windows Vista is in various gaming titles. Additionally, they also check out the image quality.
To address the hardware concern, we’re using two different video cards: a 7600 GT and an 8800 GTS 320MB, graciously provided by AVADirect. These represent the mid-to-low range and upper range of current video cards. The rest of the system was supplied to us by Puget Custom Computers and represents a solid mid-range computer – the specifications are below. The idea behind using different video cards was two-fold. First, we get to test how different cards will play the same games under the two OS environments. Also, however, we’re testing two different drivers from NVIDIA. One of these cards is also a DX10 card, so we were interested to see how/if this made a difference. Below the specifications are the Vista system performance ratings for the 7600 GT and 8800 GTS configurations, respectively..
You can check it out over here. Overall they found that Windows XP gives much higher performance than Windows Vista. Only in one case Windows Vista scored better than XP - with a GeForce 8800 GTS in World of Warcraft.