i have small application where i need PCI express interface. and a have to chose between XC7A100T-2FGG676 board and XC7A35T-1FTG256C board.
can i use PCIe on XC7A35T-1FTG256C, and as you know this device haven't gigabyte transceivers?.
Unfortunately you do need the transceivers; see PG054 Table 4-6 (and note that the FTG256 package isn't listed and therefore isn't supported).
Could you use the CPG236 or CSG325 packages instead?