Caayn
Member
I last came across a benchmark that showed that having 40 lanes did have an impact on performance in games when running in 16x/16x compared to 16x/8x and 8x/8xFor example: A single GPU on PCIE will typically be allotted 16x pcie express lanes. On a 5820K moving to a dual GPU solution will result in each GPU being allotted 8x lanes each. On a 6850K, which has 40 PCIE lanes, a dual GPU solution will have 16x per GPU. This should in theory provide higher bandwidth but there has not been any real evidence to suggest one is faster than the other.
Will try to find the benchmark and post it when I found it.
Edit: Read this thread and most notably Blair's posts.
http://www.forum-3dcenter.org/vbulletin/archive/index.php/t-509912-p-9.html