Well I found a store with "pulled from working systems" W4100 cards for $30USD a pop, tried to order 3, but they only had 2 on the shelf. So guess I'm getting 2. These have 4 mini display port holes on, nothing else. However, I looked in my stash, I have the miniDP to VGA I snagged the other day and two mini DP to maxi DP and a DP to VGA, so I should be okay until I wanna add monitors.
I was gonna try the bridgeless crossfire if I got three of them... Because I have one more immediate need for one of them, but the other system I could delay install or borrow it back, so could have played with #2 and #3 together in a C2Q system and see what they did for crossfire or under Vulkan how that distributed between Vulkan cores ( I think that's why crossfire and SLI got dropped, no need with Vulkan*) buuuut I don't think it will happen with only 2 arriving as the first one is spoken for and the system that would take two of them is "a ways" from being ready to do it.
* Am I weird if I kinda wanna put a Intel CPU with graphics together with both an AMD and Nvidia GPU in the same system and use all Vulkan cores on those to see if it works together? 🤣
edit: Note to self and anyone trying to read my mind, found random Newegg reviewer saying MSI Afterburner is the way to go for overclocking these, that was in 2015ish so versions/drivers from around then may be necessary.
Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.