The rendered frames. I never mentioned anything how a single GPU presents a frame to the monitor... but it only takes 1 GPU in an SLI configuration to display something. If you've got a 2nd GPU, it needs to send it's display data to the primary GPU. Not a hard concept to grasp. Have you ever coded anything that is multi-threaded, networked, or communicates to another piece of hardware? Because if you did, you'd realize it doesn't matter how fast the data rate is, the act of communication alone takes up time. This could be for a number of reasons, such as but not limited to: sending acknowledgement packets, sending data on specific time intervals, filling up a buffer, or waiting for the receiving end to say it's ready (and no, I'm not saying all of these things apply to GPUs). Whether I deliver a single piece of paper or a 10kg package to you, if I use the same shipment method, the duration of the delivery won't change. The amount of data doesn't matter in this situation, because as you pointed out, it's very minimal. How about stop changing the goal post, eh? And yes, games don't rely on AFR. Back when I did multi-GPU many games, despite working with AFR, opted not to use it. Multi-GPU is optional. Anyway, you're driving this way too hard on opinion, because despite the fact that I personally prefer AFR, there are many who don't. SFR has inherent advantages, and I used it whenever it gave me an acceptable experience (which was pretty much any AAA game that wasn't a crappy console port). Sure, I'll admit it was weird, if not a bit wrong to assume SFR was being used. But ultimately that doesn't change my point; SFR is just simply a stronger example. I don't understand why you're so focused on SFR - the only relevance it has to this whole discussion was me bringing up Amdahl's Law, which at this point I regret bringing up. Uh... I never suggested anyone was behaving in any way, so what exactly is all in my head, and not yours? Clearly, if I knew nothing about this subject, you'd have given up like your post originally claimed. But you can't help handle the concept that maybe you're actually wrong or maybe you're blowing this whole situation way out of proportion for no good reason. Seriously, I didn't claim that I had the indisputable truth, it was just a thought. Mind explaining how consistency is achievable if the GPUs aren't identical and don't synchronize? Even if the GPUs were completely identical in every regard, the data they're processing isn't identical, so they can't depend purely on timing; they must communicate. I never said it was complex... Stop jumping to conclusions. Seriously, you don't have to act like this - you're choosing to see the worst in me. Regardless, refer back to my statement earlier about delivering letters and packages. I'm well aware... I don't see how that's relevant to this? You seem to be just mashing a bunch of words I said from separate unrelated points. That I am fine with admitting I was mistaken about. Likewise. And you still need to learn to calm down. You could've approached this politely.