Hey, now i’m using ati 7850 with the same tearing problems on eyefinity mode.
I tried to read all forums in the universe, and it seems that there are two possible answers:
1-Problem Can’t be fixed, hardware limitation:
Basically what you have going on is, your middle and right monitor are connected to the true DVI outputs on your card. Your left monitor is connected to the internal DP->DVI (or HDMI) connection. This means your left monitor is actually on the DP channel so it can’t share v-sync with the other 2 monitors when you group them into a single monitor. "
2-Problem can be fixed changing the clock speed:
The second one didn’t work for me.
But I notice there’s a big difference Turning on or off The AERO mode in windows. With aero on, there’s a constant horizontal tearing. With aero off, there’s more like a flickering or irregulear tearing, but noticeable if you move a window fast.
This is really anoying, I could manage to get 8 outputs with 2 X 7850, and the performance with Eyefinity on is great (4x1 on each card) WITH tearing , but with individuals renderers on each output FPS slows down to 10 fps, WITHOUT tearing