Still running 1366 in both my main desktops. i7 970 Hex core in my main PC at home and the 950 in my LAN PC. Also my main VMWare server runs a pair of 1366 Xeons. 7 years old and still going strong. Scary as i have not logged in here for a long time and my system specs are still mostly valid.
I think it depends if you have scaler in the screen or not.
If the screen has HDMI/VGA ect then i think it will work but i can't be sure as i don't have one with those inputs.
When i tried with mine (only has the DVI) it would not work with a mainboard that only had single link DVI.
It's a Controller Card out of a old IBM DS6800 Fiber channel SAN.
Unfortunately the CF card that holds the firmware is dead so it does not work anymore.
I only have a standard subscription currently and if i was to upgrade to Pro do they still give you 5 license keys for each product or have they reduced that as well?
I have used the Catleap screens with both a 5850 and a 5870
I have had 3 running from a 5870 only issues i had is that i had no display in the bios
I was using a DP to Dual Link DVI Adapter for the 3rd screen
I haven't had any issues with my non reference 5850 even get display in the bios
I don't know what seller you got yours from but when mine was missing the power adapter the seller had a new one sent out in less then 24hours and arrived in 3 working days
Your situation is a little different as you have a faulty one so i don't know if they will expect it to be sent back
I have ordered 5 Catleaps from greensum and the only issue so far is one of them was missing the power adapter but the seller was very fast to send me a new adapter
Other then that i haven't even had a dead pixel yet
Now i just need to find a triple monitor stand that can hold 27" screens
I have 3 of these screens (And 2 more on the way for friends)
Non Reference 5850 post fine
Sapphire and XFX Reference 5870 Does not post with DVI but works fine using a Dispaly Port to Dual Link DVI Adapter