@Wolfshadw
Well I had the model number on it, don't call me an idiot but it doesn't look like the usual of its kind (Radeon HD 7770).
The model is apparently: "90 c1cs01 l0uay0bz" according to the sticker.
And trying that isn't an option, long story 😛
Curious, the cooler on it seems to be a take off of the one MSI used on their reference 7730 cards. The fan, and fan opening, is bigger on your card, and the heatsink behind is of a different design, so it's not exactly the same.
The '7770' you have is certainly one I haven't seen before, and while it may just be the camera angle, it appears to have a PCB smaller than on any other 7770 card I've seen (the back of the PCB is oddly sparse as well...), but I wonder if it could be a version that only gets sold in certain countries (there are a number of products that only get sold in China for instance)?
Either way, we won't know what's what until you get GPU-Z to have a look at it, as others suggest. You're really going to want/need to double check all the specs when you look at in GPU-Z though...
Hahaha, there is a first time for everything I guess - to see such a motherboard stripped down of every possible slot apart from RAM and CPU. And this is why I never recommend buying branded PCs.
Wow! No expansion slots at all. Best we can recommend now would be to ask a friend to try installing it into their system for you to identify the card.
That you most definitely were! Blimey, what an unusual motherboard; don't see many with an LGA socket and no expansion slots! Thanks for that, it's good to be reminded that these types of board exist, and that the presence of an x16 PCIe slot isn't always a given.
Good luck with your efforts to identify the card; hopefully you can find a friend who'll let you test it on their system, like Wolf suggests.