340 pins of fun, i myself checked theses too, unless someone design and an adapter board to fit more modern pci boards ... ??
I think the scope power pc interface do use the pci section of the nlx interface ...
I have an Intel Getway 3400 Nlx 815 motherboard that i tested on a 7404 loll no luck, must miss a voltage or something else, the scope power led become red
but will take all the space up to the front scope plate ... it is way bigger in size, i saw no other 815 Nlx boards ...
would need to poke ... but this scope is not mine