@Stubbies2003:
Completely wrong. I’ve been running my 670 GTXs in SLI with BMS since day 1 and I can run it in either windowed or full screen without having to “trick” anything. No crashes in either mode.
Firstly, you are talking to probably one of the most experienced users on the planet with regard to SLI and Crossfire. Secondly, are you referring to landscape or portrait Surround? All of my information is in regard to portrait only. Thirdly, whatever you think is happening in windowed mode surround SLI isn’t what is occurring. In windowed mode, you are only showing balanced GPU usage because the second GPU is only mirroring or “replicating” the first card. It simply has to transfer the data from card #1 to card #2 for the third monitor. Card #1 is actually doing all of the processing.
It isn’t actually giving you more performance. One easy way to confirm this, is enable the “show the SLI on-screen indicator” in NVIDIA Inspector. If the green SLI balance bar doesn’t appear like in my photo in post #1, you are not running in SLI. You will only get that in full-screen mode, in any split render mode of AFR1, AFR2, or SFR. You will also notice different GPU utilization numbers between full-screen and windowed mode in SLI. If SLI was working in BMS windowed mode, GPU usage between full-screen and windowed mode would be identical. Try it.