7750 won't output to 3rd screen

Hey guys. I've got a bit of a puzzle here.

I've been running two screens, awaiting a desk upgrade (which I finally found. Took long enough!) to put my 3rd screen into the loop.

Now I've got everything all connected, I can't seem to get my GPU to output to all of the screens at once. This shouldn't be -- I got the card because of everything within my price range, it was the nicest one to support at least 3 screens. Now, I can get the card to output to any two screens at once, but AMD CCC wants me to disable a screen to enable a third one. They all show up just fine, the GPU knows they're there.

I'm talking to Asus tech support but they send about one email every 24 hours so the pace is maddening. Maybe you guys will be faster.

To note, I'm not trying for Eyefinity. The card struggles sufficiently to output to just the main screen when in-game, I think it might combust if I tried to make it play a game in Eyefinity, so this is just for productivity. 

Relevant details follow:

GPU: Asus HD775-1GDR5-v2

Screen 1: HANNspree HF237 (HDMI)

Screen 2: NEC LCD1970GX (DP-DVI)

Screen 3: Acer AL1717 (DV-VGA) (the GPU thinks this is a CRT. It is not.)

Hard on the GPU and screens are too different screen ratios not same 16 9 or so

. use same monitors if u have.

 

thats all for now, just quick reply

Like I said, not Eyefinity, not for gaming, I only expect the HANNspree to handle gaming.

Great question. I don't know, it's this one. http://www.monoprice.com/Product?c_id=102&cp_id=10246&cs_id=1024608&p_id=6014&seq=1&format=2

So how expensive are "active" adapters and does this affect my DVI-to-VGA as well?

 

Also, why is that?

Mine was about 40$ and I dont think the cable you linked is active. As for why, this is what they say.

Unlike passive adapters, this DisplayPort-DVI converter offers an active conversion for use with any DisplayPort output - ideal for graphics cards that are not capable of outputting multi-mode DP++ signals (e.g. ATI Eyefinity). Supporting resolutions up to 1920x1200, this compact device provides a simple solution for converting DisplayPort output for compatibility with existing DVI monitors, televisions or projectors.

Something to do with Unicorn blood I think.lol

Clearly unicorn blood, AMD must have a shortage.