6770 has DVI, D-sub, HDMI video outs, so I can connect only 2 monitors on this card.
I need f.e. 5770 DVI, D-sub, DP + active DP converter. It's about extra 180$ .
But I don't need another discrete card! I have simple passive discrete Pci-e card DVI/D-sub and I want to use it with iGPU together.
So it's better for me to buy motherboard, that will work width my discrete card.
Thx, but I don't want waste money for converters, I don't want to buy unnecessary cards, I don't need gaming, I don't need Eyefinity, I don't need extra noise (my dektop is working while I'am sleeping in the badroom).
I only need to know, on what motherboard iGPU and discrete will work together in a extended desktop mode.
I understand not wanting to drop money on a card when you won't be using the 3d stuff, but you're going to spend that money one way or another. I personally don't know of any cheap Z68 boards that have that many video outs. Either you pay extra for the mboard or you get a cheap mboard and cheap graphics card ( possibly even a new monitor to replace the older D-SUB only one. )
If you're upgrading to Z68, I suppose you could just use the integrated Sandy Brdige graphics, though I'm not sure if they will support three displays. I've got an ASRock Extreme4 Gen3 mboard that has a DVI, D-SUB, HDMI, and Display Port all on it ( the non-Gen3 model has the same. ) If Sandy Bridge supports three displays, you could use that board and a Display Port -> DVI adapter ( at least I think, I'd have to check if the mboard has some of the video outs linked or something, but I don't think they are. )
The igpu only supports 2 monitors and can work at the same time with a discrete card. Just have both enabled in the bios, it doesn't matter which is primary. Any z68 with video outputs will work. You could go with the cheaper extreme3 gen 3.
Off topic: Virtu is for using the igpu when nothing is plugged into it.
Yes, I've got the cheapest asrock pro3 and it works (built it when z68 first came out so had a small selection [and h61 and h67 also work]). The extreme3 is 8+4 phases, the p8z68-v is 12+4 so will probably OC higher but not by much. Both are "digi power." http://www.tomshardware.com/reviews/asrock-z68-extreme4... I know this article is different mobos but it's still 12 vs 16, asrock vs asus.