Gadgetory

so this is actually probably going to be a fairly interesting video here on my test bench today I have two things I have a GTX 580 from EVGA and I also have an 8600 GT ass so that's a bit of a mismatch you think what I will be looking at today is the performance impact of a high performance graphics card versus a low performance graphics card as a dedicated this X processor so this GTX 580 is going to be doing all of my graphics processing regardless and then I'm going to run two different scenarios I'm going to run with the 8600 GT s as my dedicated PhysX card and then I'm going to try running with another GTX 580 which is obviously ludicrously overkill as my dedicated PhysX card so if you guys check out up here I have my physics configuration set so I have selected the 8600 GT s as my dedicated PhysX card and I'm going to try with both scenarios and I'll let you guys know how it goes well I've already run into some interesting results so I'm running at 1920 by 1080 on mafia 2 I'm running with high details 8 x AF anti-aliasing is on and I've already run only 2 scenarios so I've run the GTX 580 with the 8600 GT s as a dedicated PhysX card and then I run the GTX 580 ignoring the 8600 GT s so using itself for physics you can force that in the driver as well and it actually scored those are the GTX 580 actually scored 66% higher by itself then it did by tying it down with this 8600 GT s to do the physics processing so let's see what else we can investigate here so at this point guys I've run quite a few more fascinating scenarios so here you can see my GTX 580 running a gtx 550 ti as a dedicated physics card but i've actually finished all of the run throughs that i am going to do and i just want to share with you my results so this is also going to be a sneak peek into what my next episode is going to be looking at PCIe bandwidth and the effects on gaming performance here I have my full results so the GTX 580 alone gets about 50 frames per second you throw in a physics card that's too slow and it goes all the way down to 30fps so what that means to me is that you're far better off to just let this card do both the graphics and the physics by itself then to give it something that's so slow that it bottlenecks it and that the physics calculations are going to be behind the rate at which this card can draw the frames okay so that is clearly a problem okay so then I tried a few cards of varying power as a dedicated PhysX card so I tried an additional GTX 580 I tried a GTX 560 Ti as well as a gtx 550 so I don't know where the threshold is but it looks like this is how it works for physics because these three are all within margin of error of each other regardless of how much physics power we're throwing at it I mean a GTX 580 is clearly overkill for physics processing but you can see that the 550 ti and the 560 T are also both just fine so the answer is I don't know exactly where that threshold is and it's going to depend from game to game how much physics processing is needed but what you need for physics is a card that is fast enough not too slow because that will bottleneck your entire setup and not so fast that you're spending way too much money on it so something like a 550 or even something a little bit lower end or maybe a last generation card that you can get your hands on on the cheap is probably the best bet if you have something like a GTX 580 as your main card so thanks for checking out this little physics episode of Linus tech tips don't forget to subscribe for my unboxings reviews computer videos and other good stuff like that