Originally Posted by Darylrese
Now I have a 120hz monitor, i'm thinking of buying a second Asus GTX 670 for my PC...SLI owners, is it worth it with this card? (NON TOP) In SLI I believe the slots run at x8...is this going to slow things down? Curently have a single Asus Direct CU ii GTX 670 NON TOP @ 1293mhz core running at x16 PCI-E 3.0.
The PCI-E slots are separated by a single PCI slot, hopefully there would be sufficient breathing room if I had 2 cards installed after moving my Asus D2X Sound card
Warning: Spoiler! (Click to show)
I once answered a very similar question (also about 670's) in the Sabertooth Z77 owners club. I'll quote myself here, as it answers your question as well:
Originally Posted by keesgelder
You have nothing to worry about.
You might be interested in this
article (they tested extensively how the GTX680 and 7970 performed with different lane configurations). Turns out, there's little difference between PCIe (3.0) x16 and x8 with the tested cards. For example, take one of their Battlefield 3 benchmarks
(results vary per game, but never anything serious). 0.7% difference between PCIe (3.0) x16 and x8 (for the GTX680). You'd even be fine with PCIe (3.0) x4; only a 1% difference compared to x16. I don't think results for the GTX670 will be very different.
Quote from a later article on GTX670 SLI
: "PCI-Express 3.0 x8 provides bandwidth that yields performance identical to that of PCI-Express 2.0 x16, and that PCI-Express 3.0 x16 makes these current-generation high-end GPUs no more than 1% faster" (regarding the 7970 and GTX680).
I'm probably going for a second GTX670 myself later this year as well. In my case, I'll be on PCIe 2.0 x8. Still, not much to worry about
. I'm more worried about temps, but I'm just assuming it'll be okay
I'm going to add my second Asus GTX670 (non-top as well) somewhere this week (more likely towards the end of the week, it still has to arrive and I have some exams to prepare). If you want, I can post results here in terms of temperatures and scaling. Can't wait for it that's for sure
I was most worried about temperatures myself, but I'm hearing stories that it should be fine. One of the main advantages of this card is that it is really quiet (even at 100% it's not that loud), so you can just ramp up the fan curve a bit if temps get uncomfortable.
In short, I don't think you have anything to worry about (and especially not in terms of scaling with x8 x8).
(PS: I'm also going SLI for 120Hz)