Gadgetory

today I'll be using a synthetic benchmark in this case 3dmark 11 to evaluate something that I have received a lot of questions about over the years so what you may or may not notice is that I have changed my test bench I have gone with an Intel X 58 platform for this particular test I'm using the gigabyte g1 gorilla motherboard you guys better look at that g1 gorilla motherboard with an Intel Core i7 960 so that is a quad core processor I've got that chip clocked at 4 gigahertz in order to reduce the any CPU bottlenecks that may occur in a my test and now ok no do not always ask before opening this file so what I'm going to be looking at today is the effect of PCI Express band width on SLI performance so you can see I have not used the top slot and there's a very good reason for that if I populate the top slot then it will run at 16x bandwidth and then if I populate the second slot I will have two cards running at 16x bandwidth if I populate these two slots I will have two cards running at here we are PCIe 16 at 8 X bandwidth so I'm just going to switch to the other card and show you guys here so there you are at 8 I expand with so that is what we're going to test I'm going to see what the 3 mark score is writing in these two slots versus these two slots so you guys can see how much of the difference there is in performance okay so for my first run-through we got X 3 3 8 6 3380 6 3d marks in 3d mark 11 so now let's run them at 16x and see what kind of performance boost we get from giving them the fall available bandwidth our two card configuration running the same test achieves 3389 3dmark so for comparison at 8 X + 8 X bandwidth we achieved 3300 and eighty-six 3d marks so we oh hold on hold on oh no we should put an ad on three three eight nine okay divided by three three eight six to find out the performance improvement point zero zero zero a one-mile rather that's a point zero one percent performance improvement by going from 68 X 8 X 2 16 X 16 X pcie 2.0 slots so to anyone who wants to run SLI or crossfire on the Intel P 67 platform I guess this means you're pretty safe from performance degradation even with high performance GPUs like the GTX 580 thank you for checking out this little episode of Linus tech tips don't forget to subscribe for more unboxings reviews and other computer videos